# Purpose of holes in motor\_driver\_case? **URL:** \ **Category:** Contributions\ **Created:** [6 June 2020 14:55 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46 "2020-06-06T14:55:04Z")\ **Posts on this page:** 16\ **Page:** 2
**Author:** ![r.w.bowman](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/r.w.bowman/32/15_2.png) [@r.w.bowman](https://openflexure.discourse.group/u/r.w.bowman)\ **Post date:** [12 August 2020 08:57 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/21 "2020-08-12T08:57:57Z")
Sorry, that’s my fault - it’s currently sitting in a merge request, but I have asked it to rebuild the STLs for said merge request here: > **[Wall thickness (!162) · Merge Requests · OpenFlexure / openflexure-microscope](https://gitlab.com/openflexure/openflexure-microscope/-/merge_requests/162/pipelines)** > > This is both @orgemd and @rwb27 changes that should be done in an hour or so. Once they’ve built, I will try to remember to tell gitlab not to throw away the STLs. Feel free to remind me of this! ---
**Author:** ![r.w.bowman](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/r.w.bowman/32/15_2.png) [@r.w.bowman](https://openflexure.discourse.group/u/r.w.bowman)\ **Post date:** [12 August 2020 10:17 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/22 "2020-08-12T10:17:52Z")
STLs are here: > **[build (#682295235) · Jobs · OpenFlexure / openflexure-microscope](https://gitlab.com/openflexure/openflexure-microscope/-/jobs/682295235)** > > A 3D printable microscope and translation stage They should stick around for a while. However, I’m not sure the thick walls version is built automatically yet - so you may need to clone the repository, check out that branch, and build it yourself with OpenSCAD if you are happy doing that. ---
**Author:** ![r.w.bowman](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/r.w.bowman/32/15_2.png) [@r.w.bowman](https://openflexure.discourse.group/u/r.w.bowman)\ **Post date:** [12 August 2020 10:18 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/23 "2020-08-12T10:18:31Z")
the Arduino nano motor driver case is built automatically though - so you can get that one. ---
**Author:** ![Gris74](https://avatars.discourse-cdn.com/v4/letter/g/838e76/32.png) [@Gris74](https://openflexure.discourse.group/u/Gris74)\ **Post date:** [12 August 2020 11:06 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/24 "2020-08-12T11:06:09Z")
Thanks Richard, I download it already and the print is running. By the way I will test it on a new assembly with microscope\_stand\_45-BS + optics\_picamera\_2\_rms\_infinity\_f50d13\_beamsplitter with 4x lens ---
**Author:** ![r.w.bowman](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/r.w.bowman/32/15_2.png) [@r.w.bowman](https://openflexure.discourse.group/u/r.w.bowman)\ **Post date:** [12 August 2020 17:19 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/25 "2020-08-12T17:19:03Z")
Excellent - do let us know how it works 🙂 This is now merged, by the way, so it will be in the next release. ---
**Author:** ![Gris74](https://avatars.discourse-cdn.com/v4/letter/g/838e76/32.png) [@Gris74](https://openflexure.discourse.group/u/Gris74)\ **Post date:** [12 August 2020 17:43 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/26 "2020-08-12T17:43:26Z")
Here is the Motor case printed and every thing feet well in it, even without cable optimisation (yet). The microscope stand 45 feet well, I am wainting for the BS version to finish to print now. Keep you inform and great integration. ![IMG_20200812_193651_resized_20200812_074204348](https://global.discourse-cdn.com/free1/uploads/openflexure/original/1X/5089bf8dc67832dfcbea9a36f7992296dfe2936b.jpeg) ![IMG_20200812_193724_resized_20200812_073750299](https://global.discourse-cdn.com/free1/uploads/openflexure/original/1X/19b46b7e2af11455da71963c6855f071ab78da72.jpeg) ! ---
**Author:** ![Dleung](https://avatars.discourse-cdn.com/v4/letter/d/a183cd/32.png) [@Dleung](https://openflexure.discourse.group/u/Dleung)\ **Post date:** [12 August 2020 21:18 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/27 "2020-08-12T21:18:55Z")
This looks great. @Gris74 what length of jumper wire did you use? ---
**Author:** ![Gris74](https://avatars.discourse-cdn.com/v4/letter/g/838e76/32.png) [@Gris74](https://openflexure.discourse.group/u/Gris74)\ **Post date:** [12 August 2020 21:25 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/28 "2020-08-12T21:25:47Z")
@Dleung, I use this one from [Amazon](https://www.amazon.fr/gp/product/B01JD5WCG2/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1) it say 20 cm but in fact from end to end it’s 21cm And Welcome here by the way 😄 ---
**Author:** ![Dleung](https://avatars.discourse-cdn.com/v4/letter/d/a183cd/32.png) [@Dleung](https://openflexure.discourse.group/u/Dleung)\ **Post date:** [12 August 2020 21:44 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/29 "2020-08-12T21:44:12Z")
Thanks for the warm welcome; I’m learning lots, although admittedly it’s taken more time than expected. Sorry if this is getting off-topic. What was your solution for power? Based on the second photo, it looks like you soldered a 4 to 1 junction (3 to 1 for power) with thicker wires. I was planning to do something like this and then breakout to micro USB female or USB male. ---
**Author:** ![Gris74](https://avatars.discourse-cdn.com/v4/letter/g/838e76/32.png) [@Gris74](https://openflexure.discourse.group/u/Gris74)\ **Post date:** [12 August 2020 21:59 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/30 "2020-08-12T21:59:41Z")
> [@Dleung](#): > > Sorry if this is getting off-topic. What was your solution for power? Based on the second photo, it looks like you soldered a 4 to 1 junction (3 to 1 for power) with thicker wires. I was planning to do something like this and then breakout to micro USB female or USB male. I do not, I didnt work on this part yet, I still running 2 differents PSU, a classic one for the PI and modify ATX PSU for the motor 5v. But sure it will come a time I will do a single power plug for it. ---
**Author:** ![vthyng](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/vthyng/32/160_2.png) [@vthyng](https://openflexure.discourse.group/u/vthyng)\ **Post date:** [21 August 2020 05:34 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/31 "2020-08-21T05:34:15Z")
@Gris74 I am unclear where to go for the stl where the motor driver case has the nano on its side. ---
**Author:** ![Gris74](https://avatars.discourse-cdn.com/v4/letter/g/838e76/32.png) [@Gris74](https://openflexure.discourse.group/u/Gris74)\ **Post date:** [24 August 2020 09:12 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/32 "2020-08-24T09:12:38Z")
@vthyng just go to [this link](https://gitlab.com/openflexure/openflexure-microscope/-/jobs/682295235) share by Richard. Clic on the Job artifacts donwload bouton on the right side bare. Inside the build zip file you will find the _motor\_driver\_case\_arduino\_nano.stl_ ---
**Author:** ![vthyng](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/vthyng/32/160_2.png) [@vthyng](https://openflexure.discourse.group/u/vthyng)\ **Post date:** [26 August 2020 05:14 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/33 "2020-08-26T05:14:48Z")
Thank you, I am getting that printing now! Vince ---
**Author:** ![hiphouser](https://avatars.discourse-cdn.com/v4/letter/h/7ba0ec/32.png) [@hiphouser](https://openflexure.discourse.group/u/hiphouser)\ **Post date:** [12 December 2020 22:25 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/34 "2020-12-12T22:25:34Z")
Nice! Thank U! ---
**Author:** ![jenovauh](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@jenovauh](https://openflexure.discourse.group/u/jenovauh)\ **Post date:** [26 August 2021 16:38 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/35 "2021-08-26T16:38:26Z")
Not sure if anyone using similar ULN2003 motor driver board like me, I found out that _motor\_driver\_case\_arduino\_nano.stl_ could not fit mine so I modified the model to suit mine. If anyone need that I can send it to you. ![image](https://global.discourse-cdn.com/free1/uploads/openflexure/original/1X/1fe1565e3d4718c774d0d800d0dfe7d5a28f9e33.jpeg) ---
**Author:** ![r.w.bowman](https://yyz2.discourse-cdn.com/free1/user_avatar/openflexure.discourse.group/r.w.bowman/32/15_2.png) [@r.w.bowman](https://openflexure.discourse.group/u/r.w.bowman)\ **Post date:** [20 September 2021 07:18 UTC](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46/36 "2021-09-20T07:18:51Z")
That looks neat - I think your boards are smaller than most I have seen, and your Nano is bigger because of the screw terminals. I think the forum should let you post STL and SCAD files, so by all means do upload them here for posterity! [Previous page](https://openflexure.discourse.group/t/purpose-of-holes-in-motor-driver-case/46.md?page=1)