# Left Motor test fails **URL:** \ **Category:** Troubleshooting\ **Created:** [August 15, 2018, 9:33am UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795 "2018-08-15T09:33:41Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 4, 2019, 2:46pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/21 "2019-04-04T14:46:58Z")
Ok, where would that be located in the Ground Control folder? Under settings? or somewhere else? ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [April 4, 2019, 2:48pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/22 "2019-04-04T14:48:28Z")
> [@Gero](#): > > c:/user/{your-user-name} 👆 on win$ on linux /home/{user-name}/ ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 4, 2019, 2:49pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/23 "2019-04-04T14:49:44Z")
Okay, I found it, Thank you! ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 4, 2019, 9:06pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/24 "2019-04-04T21:06:27Z")
Alright, so I wiped the EEPROM, deleted the GC.ini, and reinstalled both ground control v1.26 and firmware 1.26. I thought it was going well until I was getting the distance between motors and the motor did not stop and pulled my chain from the right motor. I then went back into the settings and the left motor is only spinning 3/4 of the full 360 in the CCW direction, and when I use the CCW 1 degree it goes about 5 degrees CW instead of 1 degree CCW. I am really not sure what to do now. I’m sorry to keep bugging you about this, but I would like to get it resolved. @Gero ---
**Author:** ![Jatt](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@Jatt](https://forums.maslowcnc.com/u/Jatt)\ **Post date:** [April 5, 2019, 9:31pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/25 "2019-04-05T21:31:12Z")
yes, if you wipe the eeprom, and delete the ini, you will need to start over and redo all of the calibration. ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 5, 2019, 10:32pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/26 "2019-04-05T22:32:37Z")
Yes, I know. If you read through the thread, you will see the problem, I know that if I do those things I need to re-calibrate. ---
**Author:** ![Jatt](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@Jatt](https://forums.maslowcnc.com/u/Jatt)\ **Post date:** [April 5, 2019, 11:08pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/27 "2019-04-05T23:08:00Z")
Hmm. I see. Try pushing down lightly on the heatsink that drives the left motor. I seem to recall that some of the boards had bad solder joints and eventually the driver fell off the maslow shield entirely. If your motor runs properly with the driver pressed down, then it’s probably a cold solder joint. This could be fixed it you have soldering skills, or you could get a new shield. I think there are a couple of people selling them currently. ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 6, 2019, 8:15pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/28 "2019-04-06T20:15:14Z")
Heat sink that drives the left motor? What exactly are you referring too? ---
**Author:** ![Jatt](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@Jatt](https://forums.maslowcnc.com/u/Jatt)\ **Post date:** [April 6, 2019, 9:01pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/29 "2019-04-06T21:01:10Z")
![](https://yyz1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/5/50e9501289a8ef573227f6e31ab81bea4fac0318.jpeg) Your shield and heatsinks may look slightly different, this is the original version, but you should have attached the included heat sinks to your drivers during the building of your kit. Whichever side is giving you troubles, try pressing down on it and then running your test. ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 6, 2019, 9:03pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/30 "2019-04-06T21:03:42Z")
Okay, I will give that a try ---
**Author:** ![Jatt](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@Jatt](https://forums.maslowcnc.com/u/Jatt)\ **Post date:** [April 6, 2019, 9:06pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/31 "2019-04-06T21:06:35Z")
[This](https://forums.maslowcnc.com/t/maslow-headshrink-and-chip-fell-off/3321) is the thread where people reported their chips falling off, possibly due to a bad solder joint, or overheating of the driver. ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 7, 2019, 3:59pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/32 "2019-04-07T15:59:36Z")
Thank you! ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 8, 2019, 9:23pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/33 "2019-04-08T21:23:49Z")
Alright, so I looked into that thread, I did buy my machine in the batch after the one with the chip falling off problem, but I still took a look at mine. The chip was still very secure. I did glue the heat-sinks onto the chip pretty soon after I got my machine because they kept falling off of the chip. could this be causing the problem? I would be surprised because of how long my machine ran with the glue I used, but I don’t know all that much about the board itself. Should I have used a different glue? Could the glue be interfering with something? @Jatt @Gero ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [April 8, 2019, 9:35pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/34 "2019-04-08T21:35:23Z")
I can’t diagnose remote, but have fried 3 shields. Where this post is now, i would not exclude the left chip to be burnt. Is there a history of a chain wrapped around the sprocket or are you using a heavy sled (what’s the weight)? Between the heat sink and the chip there are 2 kinds of ‘thermal paste’ you can apply. - ‘thermal paste’ - ‘thermal paste glue’ Using anything else will isolate the chip from giving it’s heat off to the heat sink. ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 8, 2019, 9:37pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/35 "2019-04-08T21:37:15Z")
My sled is of normal weight, no extras added, and the chain has not been wrapped around the sprocket. thank you for your quick response! I guess I probably need a new shield then? ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [April 8, 2019, 9:38pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/36 "2019-04-08T21:38:43Z")
You seem to have excluded everything else. What glue did you use? ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 8, 2019, 9:41pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/37 "2019-04-08T21:41:04Z")
A dab of superglue, it must have worked for a period of time because I used my Maslow a lot since I glued the heat-sink on. It must have been dispersing some heat, but not enough heat. ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [April 8, 2019, 9:44pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/38 "2019-04-08T21:44:24Z")
A new shield is worth a try if the budget allows and if it was not the issue, to have one spare is never a bad idea. ---
**Author:** ![Jdeboer1999](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/jdeboer1999/32/14250_2.png) [@Jdeboer1999](https://forums.maslowcnc.com/u/Jdeboer1999)\ **Post date:** [April 8, 2019, 9:45pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/39 "2019-04-08T21:45:52Z")
Yes, I was just looking and it seems that the Maslow Surplus Shields are out of stock, and MakerMadeCNC does not sell them separatly. ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [April 8, 2019, 9:50pm UTC](https://forums.maslowcnc.com/t/left-motor-test-fails/5795/40 "2019-04-08T21:50:52Z")
> [@Frustrating... Solid cuts until the end. THOUGHTS?](https://forums.maslowcnc.com/t/frustrating-solid-cuts-until-the-end-thoughts/9397/10): > > The power supply on Amaz or Ali. Make sure its 120V or 230V or switchable. [120W-12V-10A Power supply](https://www.aliexpress.com/item/120W-12V-10A-single-output-switching-power-supply/1405686536.html?spm=2114.search0104.3.75.436d2455iDU7yz&s=p&ws_ab_test=searchweb0_0,searchweb201602_9_10065_10068_319_10059_10884_317_10887_10696_321_322_10084_453_10083_454_10103_10618_10307_537_536,searchweb201603_54,ppcSwitch_0&algo_expid=5db771cf-15e7-48f4-a029-a9c90b57863f-10&algo_pvid=5db771cf-15e7-48f4-a029-a9c90b57863f) The TLE is back on sale here: [tle5206](https://www.eastbaysource.com/products/power-control-shield-based-on-the-tle5206-h-bridge-from-infineon-technologies) Price is :-/ but it survives more currents 😉 [Previous page](https://forums.maslowcnc.com/t/left-motor-test-fails/5795.md?page=1) [Next page](https://forums.maslowcnc.com/t/left-motor-test-fails/5795.md?page=3)