{"id":180,"date":"2021-09-20T22:27:50","date_gmt":"2021-09-20T21:27:50","guid":{"rendered":"http:\/\/knowhere.myqnapcloud.com\/WordPress\/?p=180"},"modified":"2023-11-16T00:13:22","modified_gmt":"2023-11-16T00:13:22","slug":"bullseye-diy-focuser-assembly","status":"publish","type":"post","link":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/","title":{"rendered":"BullsEye DIY Focuser Assembly"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#Introduction\" >Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#Stepper_Driver\" >Stepper Driver<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#Arduino\" >Arduino<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#Preparing_The_Enclosure\" >Preparing The Enclosure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#Putting_It_Together\" >Putting It Together<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#The_Temperature_Sensor\" >The Temperature Sensor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/#Final_Installation\" >Final Installation<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introduction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In this post I will describe how I assembled together the BullsEye DIY Focusers introduced <a href=\"..\/..\/..\/WordPress\/2021\/09\/04\/bullseye-diy-focuser\/\">here<\/a>. The procedure for putting together both the NEMA17 and the NEMA11 variations is just about the same. There isn&#8217;t much extra space inside either of the enclosures so order of assembly and wire lengths do matter. You&#8217;ll find links to the products I&#8217;ve used in the text below.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Stepper_Driver\"><\/span>Stepper Driver<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>I started the assembly with the <a href=\"https:\/\/learn.watterott.com\/silentstepstick\/\">TMC2209 SilentStepStick<\/a> driver. First thing to do is to solder a jumper\/bridge between UART and Pin 6. I soldered a small piece of wire onto the jumper pads to do this.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"846\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_225907__01-1.jpg\" alt=\"\" class=\"wp-image-182\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_225907__01-1.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_225907__01-1-284x300.jpg 284w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_225907__01-1-768x812.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>You&#8217;ll definitely want to add a heasink onto the stepper driver as it can get hot especially with higher motor currents. I used a <a href=\"https:\/\/www.amazon.co.uk\/gp\/product\/B08HMDFJ1V\/\">9x9mm 5mm thick aluminium self adhesive heatsink<\/a> and put it on the other side of the PCB. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"856\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_230045__01.jpg\" alt=\"\" class=\"wp-image-183\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_230045__01.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_230045__01-280x300.jpg 280w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210729_230045__01-768x822.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Then I soldered the capacitor C3 (100uF 16V) and all the wires coming in and out from the stepper driver. Care must be taken to ensure correct polarity of the C3. I&#8217;ve put some guidance on the wire colours in the <a href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/BullsEyeFocuser.pdf\" data-type=\"attachment\" data-id=\"121\">schematic<\/a> but it&#8217;s up to you whether you want to follow them. I used <a href=\"https:\/\/www.ebay.co.uk\/itm\/332824219660\">these wires<\/a> from ebay. There&#8217;s basically four groups of wires:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Wire within the board. There&#8217;s only one ground wire running from pin 9 to pin 15.<\/li>\n\n\n\n<li>Input motor voltage wires. These should be about 12cm long.<\/li>\n\n\n\n<li>Wires to and from Arduino. These should be about 18cm long.<\/li>\n\n\n\n<li>Wires to the stepper motor. These should be about 10cm long.<\/li>\n<\/ol>\n\n\n\n<p>I used small pieces of heat shrink tubing to group the wires together which helps both the assembly further down the line and also to identify the wires from each other.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"905\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000839__01.jpg\" alt=\"\" class=\"wp-image-184\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000839__01.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000839__01-265x300.jpg 265w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000839__01-768x869.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"540\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000622__01.jpg\" alt=\"\" class=\"wp-image-191\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000622__01.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000622__01-300x203.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_000622__01-768x518.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Arduino\"><\/span>Arduino<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Before soldering the Arduino wires to and from the stepper driver it&#8217;s best to solder the odd few passive components directly in the Arduino pins together with any wires that should go in the same pins. Here&#8217;s how I soldered R3, R4, C2 together with VIN and GND wires (10 cm) that go to the 12V connector in the front panel. Be aware of the C2 polarity if you&#8217;re using a tantalum capacitor like I am!<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"754\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_123110-754x1024.jpg\" alt=\"\" class=\"wp-image-185\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_123110-754x1024.jpg 754w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_123110-221x300.jpg 221w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_123110-768x1043.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_123110.jpg 800w\" sizes=\"auto, (max-width: 754px) 100vw, 754px\" \/><\/figure>\n\n\n\n<p>Next I soldered capacitor C1 (10uF) together with the GND wire followed by the red wire (+5V \/ pin 27) and brown wire (D12 \/ pin 15). Be sure to put the C1 the right way around. Also be sure to read the design notes regarding C1 <a href=\"..\/..\/..\/WordPress\/2021\/09\/04\/bullseye-diy-focuser\/#Design_Notes\">here<\/a>.  These three wires (about 12cm) go to the 3.5mm stereo jack used for the temperature sensor. After this I soldered the brown and orange wires (about 12cm)  from D10 and D11 to the dual red\/green LED cathodes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"359\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_132830.jpg\" alt=\"\" class=\"wp-image-190\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_132830.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_132830-300x135.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_132830-768x345.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Before soldering the rest of the wires to and from the stepper driver I soldered R2 in place together with the orange wire on pin 8 (D5). This orange UART wire goes to pin 6 of the stepper driver. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"392\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_154853.jpg\" alt=\"\" class=\"wp-image-193\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_154853.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_154853-300x147.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210809_154853-768x376.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Now is a good time to solder the wires on the legs of the reset switch SW1 which is a 6mm x 6mm x 4.3mm miniature tactile switch. I cut off the unused legs of the switch so they don&#8217;t get in the way when placing the switch inside the enclosure. The other end of the green wire I soldered to the reset pin on the Arduino (pin 3). The black GND wire I soldered onto one of the connectors in the front panel.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"614\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210811_220544.jpg\" alt=\"\" class=\"wp-image-197\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210811_220544.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210811_220544-300x230.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210811_220544-768x589.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Next you can solder the rest of the wires to the Arduino Nano following the schematic. It looks a little messy at this stage but there should be enough space for the wires inside the enclosure if you guide them carefully. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"443\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173908__01.jpg\" alt=\"\" class=\"wp-image-200\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173908__01.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173908__01-300x166.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173908__01-768x425.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"462\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173932__01.jpg\" alt=\"\" class=\"wp-image-201\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173932__01.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173932__01-300x173.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173932__01-768x444.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"771\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_125258-771x1024.jpg\" alt=\"\" class=\"wp-image-198\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_125258-771x1024.jpg 771w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_125258-226x300.jpg 226w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_125258-768x1020.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_125258.jpg 800w\" sizes=\"auto, (max-width: 771px) 100vw, 771px\" \/><\/figure>\n\n\n\n<p>After this you can install the <a href=\"https:\/\/www.amazon.co.uk\/gp\/product\/B07K54ZTHJ\">DC jack<\/a> (J1), the 3mm dual common anode <a href=\"https:\/\/www.ebay.co.uk\/itm\/231756471674\">LED<\/a> (D1) with a <a href=\"https:\/\/www.ebay.co.uk\/itm\/Plastic-Clip-Holder-for-LED-Light-Diode-Display-Case-Bezels-Panel-3mm-\/265213615009\">collar<\/a> and the <a href=\"https:\/\/www.ebay.co.uk\/itm\/351607508978\">3.5mm stereo jack<\/a> for the temperature sensor (U1) onto the enclosure lid. I soldered the resistors R1 and R5 to the legs of these components along with the wires to and from the stepper driver and Arduino.  <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"710\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173742__01.jpg\" alt=\"\" class=\"wp-image-209\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173742__01.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173742__01-300x266.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210730_173742__01-768x682.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Preparing_The_Enclosure\"><\/span>Preparing The Enclosure<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>I used M3x10 machine screws to secure the lid onto the enclosure. While you could screw them directly to the plastic, I found it&#8217;s better to use v-coil thread inserts for durability. You can get a <a href=\"https:\/\/www.amazon.co.uk\/gp\/product\/B005HFHG28\/\">kit<\/a> that includes everything you need to do the task. The procedure is fairly simple. First you drill the screw holes to the correct size using the drill bit included in the kit.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"806\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130417.jpg\" alt=\"\" class=\"wp-image-203\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130417.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130417-298x300.jpg 298w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130417-150x150.jpg 150w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130417-768x774.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Then you tap the holes with the threading tap in the kit. I used a drill to do this but you have to be careful and go very slow. It&#8217;s very easy to strip the threads if you go too far. You can also melt the plastic if you go to fast! I suggest to do this with hand tools if you haven&#8217;t done anything like this before.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"666\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130633.jpg\" alt=\"\" class=\"wp-image-204\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130633.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130633-300x250.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_130633-768x639.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Then you use the installation tool to put the thread inserts at correct depth into the tapped holes. Just below the surface of the plastic is good.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"731\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131444.jpg\" alt=\"\" class=\"wp-image-205\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131444.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131444-300x274.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131444-768x702.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"839\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131700.jpg\" alt=\"\" class=\"wp-image-206\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131700.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131700-286x300.jpg 286w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131700-768x805.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Finally you use the break tool to break off the little tang used for installation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"771\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131726-771x1024.jpg\" alt=\"\" class=\"wp-image-207\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131726-771x1024.jpg 771w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131726-226x300.jpg 226w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131726-768x1020.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210808_131726.jpg 800w\" sizes=\"auto, (max-width: 771px) 100vw, 771px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Putting_It_Together\"><\/span>Putting It Together<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Unfortunately I don&#8217;t have many photos of how I put all the bits together but the procedure is basically this:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Place the reset switch SW1 in it&#8217;s holder inside the enclosure.<\/li>\n\n\n\n<li>Place the stepper driver into it&#8217;s slot with the heatsink up.<\/li>\n\n\n\n<li>Connect the stepper motor wires and temporarily secure the motor in it&#8217;s place using a couple of screws.<\/li>\n\n\n\n<li>Slide the Arduino in it&#8217;s slot carefully guiding the wires so that they don&#8217;t get squashed.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"755\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_113152__01-755x1024.jpg\" alt=\"\" class=\"wp-image-212\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_113152__01-755x1024.jpg 755w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_113152__01-221x300.jpg 221w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_113152__01-768x1042.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_113152__01.jpg 800w\" sizes=\"auto, (max-width: 755px) 100vw, 755px\" \/><figcaption class=\"wp-element-caption\">Please note this is an old photo before I added the reset switch into the design. The switch should be installed first.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Temperature_Sensor\"><\/span>The Temperature Sensor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>I wanted to be able to screw the temperature sensor onto the existing M4 threads on my focuser so I designed a 3D printable enclosure for it that houses the <a href=\"https:\/\/www.amazon.co.uk\/gp\/product\/B01LZCZOJJ\">sensor<\/a> and a short M4 bolt directly in contact with the sensor. For the cable I used an <a href=\"https:\/\/www.ebay.co.uk\/itm\/351901104864\">audio cable<\/a> with 3.5mm stereo plugs which I cut in half so I could make two sensors for both of my focusers.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"729\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185251-729x1024.jpg\" alt=\"\" class=\"wp-image-215\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185251-729x1024.jpg 729w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185251-214x300.jpg 214w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185251-768x1079.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185251.jpg 800w\" sizes=\"auto, (max-width: 729px) 100vw, 729px\" \/><\/figure>\n\n\n\n<p>The photo above shows the wires soldered onto the sensor and insulated with some heat shrink tubing. The red wire is +5V and goes to the tip of the plug at the other end. Black wire is GND and goes to the sleeve of the plug. The white wire is the data from the sensor and goes to the ring of the plug.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"703\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185424-703x1024.jpg\" alt=\"\" class=\"wp-image-216\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185424-703x1024.jpg 703w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185424-206x300.jpg 206w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185424-768x1119.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185424.jpg 800w\" sizes=\"auto, (max-width: 703px) 100vw, 703px\" \/><\/figure>\n\n\n\n<p>The blue sleeve screws onto the sensor housing over strain relief piece which locks the cable in place. For this to work properly the cable needs to be about 3.5mm in outside diameter. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"642\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185544.jpg\" alt=\"\" class=\"wp-image-217\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185544.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185544-300x241.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185544-768x616.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Final_Installation\"><\/span>Final Installation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Obviously every telescope is different and I can&#8217;t possibly cater for all of them. In the design files I&#8217;ve included an L-Bracket that fits a <a href=\"https:\/\/williamoptics.com\/fluorostar-91\">William Optics Fluorostar FLT-91<\/a> which uses the NEMA17 version of the focuser. There is also a bracket to fit the NEMA11 version onto a <a href=\"https:\/\/www.baader-planetarium.com\/en\/2%22-bds-nt-baader-diamond-steeltrack.html\">Baader Diamond Steeltrack NT<\/a> focuser.<\/p>\n\n\n\n<p>Please do let me know if you are designing brackets for other telescopes and I can link them here.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"692\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185739-1-692x1024.jpg\" alt=\"\" class=\"wp-image-219\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185739-1-692x1024.jpg 692w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185739-1-203x300.jpg 203w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185739-1-768x1137.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210731_185739-1.jpg 800w\" sizes=\"auto, (max-width: 692px) 100vw, 692px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"788\" height=\"1024\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210623_123832-1-788x1024.jpg\" alt=\"\" class=\"wp-image-221\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210623_123832-1-788x1024.jpg 788w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210623_123832-1-231x300.jpg 231w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210623_123832-1-768x997.jpg 768w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/09\/IMG_20210623_123832-1.jpg 800w\" sizes=\"auto, (max-width: 788px) 100vw, 788px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"724\" src=\"..\/..\/..\/WordPress\/wp-content\/uploads\/2021\/10\/IMG_20211004_161353.jpg\" alt=\"\" class=\"wp-image-237\" srcset=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/10\/IMG_20211004_161353.jpg 800w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/10\/IMG_20211004_161353-300x272.jpg 300w, https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-content\/uploads\/2021\/10\/IMG_20211004_161353-768x695.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Do let me know in the comments below if you&#8217;re struggling with anything and I will amend this post accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction In this post I will describe how I assembled together the BullsEye DIY Focusers introduced here. The procedure for<\/p>\n<p><a href=\"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/2021\/09\/20\/bullseye-diy-focuser-assembly\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\">BullsEye DIY Focuser Assembly<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":212,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"no","ngg_post_thumbnail":0,"footnotes":""},"categories":[7],"tags":[10,11,9,6,12],"class_list":["post-180","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diy-astonomy","tag-arduino","tag-bullseye","tag-diy","tag-focuser","tag-indi"],"modified_by":"nightowl","_links":{"self":[{"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/posts\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/comments?post=180"}],"version-history":[{"count":30,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/posts\/180\/revisions"}],"predecessor-version":[{"id":546,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/posts\/180\/revisions\/546"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/media\/212"}],"wp:attachment":[{"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/media?parent=180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/categories?post=180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ironmountain.halley-arctic.ts.net\/WordPress\/wp-json\/wp\/v2\/tags?post=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}