<p>I think I fixed the problem.</p>
<p>Marlin was configured in hybrid mode with stealth chop mode at low speed then spread cycle when the stepper goes faster.</p>
<p>I removed stealth chop and set spread cycle at any speed and it seems to be OK.</p>
<p>I could let the machine work for hours with no issue</p>

CC BY-SA 4.0
2022-12-22T19:47:42.787Z
Nice to post your own answer, please don't forget to accept the answer! Thanks!
0scar
CC BY-SA 4.0
2022-12-22T18:28:07.900Z
2022-12-22T18:28:07.900Z
Bernard de Terwangne
<p>I'm using:</p>
<ul>
<li>Workbee CNC</li>
<li>SKR1.4 Turbo with TMC5160</li>
<li>Marlin 2.0</li>
</ul>
<p>Steppers suddenly disabled during job. But, they get back working as soon as you restart the machine.</p>
<p>I've had the problem twice with this setup. Once with the Z-axis and once with the Y-axis (that uses two steppers, one keeps on working while the other was disabled).</p>
<p>When I had the problem in Z-axis, I decided to lower current on that axis from 2 A to 1.9 A. It's already 1.5 A for both steppers on the Y-axis.</p>
<p>Just switching off and on the machine is enough to let steppers work again say it seems not to be a wiring problem.</p>
<p>Any clue? Any advice is welcome.</p>

CC BY-SA 4.0
2022-11-26T23:12:11.430Z
What steppers do you use? NEMA 17 or 23? A current of 1.9-2 A means you need to actively cool the stepper drivers!
0scar
CC BY-SA 4.0
2022-11-27T12:24:35.127Z
did you check the G-code? Does the board feel overly hot?
Trish
CC BY-SA 4.0
2022-11-28T07:19:22.017Z
Hi,

I'm using Nema 23. The one configured with 2A are bigger ones. Steppers are warm but not hot. I can hold them in my hand indefenitly so I assume it's not too much current for them.

G-code is as generated by fusion 360. It includes long movements on the Y axis as I'm making a guitar neck. Its quite intensive on the CNC. Much wood to be removed.

Heat sinks tend to be quite hot. I can keep a finger on the top for around 3 s. This says noting on ship temperature that might well have exceded a limit.

My guess is overheating of drivers. I'll add a big fan and I hope this will fix it.
Bernard de Terwangne
CC BY-SA 4.0
2022-11-29T06:42:55.820Z
Check if your stepper drivers are overheating. Driving a nema23 motor is no joke, and at a 2A current, the drivers could be getting a little toasty, tripping the temperature limit and disabling the drivers.
CryptoAlgorithm
CC BY-SA 4.0
2022-12-07T15:38:59.003Z
Quick update : I've added a 120mm fan on top to the BTT card. Everything sems cold now.

First I thought it was OK but I had it twice again with Z axis. I had it 5 times now. Only comes on long jobs (after at least 1 hour of precessing). Any clue is welcome...

Bernard
Bernard de Terwangne
<marlin><stepper-driver><print-failure><bigtreetech>
Steppers suddenly disabled during job
Bernard de Terwangne
# Steppers suddenly disabled during job

(Asked by: username_0 on 2022-11-26)

I'm using:

* Workbee CNC
* SKR1.4 Turbo with TMC5160
* Marlin 2.0

Steppers suddenly disabled during job. But, they get back working as soon as you restart the machine.

I've had the problem twice with this setup. Once with the Z-axis and once with the Y-axis (that uses two steppers, one keeps on working while the other was disabled).

When I had the problem in Z-axis, I decided to lower current on that axis from 2 A to 1.9 A. It's already 1.5 A for both steppers on the Y-axis.

Just switching off and on the machine is enough to let steppers work again say it seems not to be a wiring problem.

Any clue? Any advice is welcome.

**Tags:** marlin, stepper-driver, print-failure, bigtreetech

> **Comments:**
> **username_1**: What steppers do you use? NEMA 17 or 23? A current of 1.9-2 A means you need to actively cool the stepper drivers!  
> **username_2**: did you check the G-code? Does the board feel overly hot?  
> **username_0**: Hi,  I'm using Nema 23. The one configured with 2A are bigger ones. Steppers are warm but not hot. I can hold them in my hand indefenitly so I assume it's not too much current for them.  G-code is as generated by fusion 360. It includes long movements on the Y axis as I'm making a guitar neck. Its quite intensive on the CNC. Much wood to be removed.  Heat sinks tend to be quite hot. I can keep a finger on the top for around 3 s. This says noting on ship temperature that might well have exceded a limit.  My guess is overheating of drivers. I'll add a big fan and I hope this will fix it.  
> **username_3**: Check if your stepper drivers are overheating. Driving a nema23 motor is no joke, and at a 2A current, the drivers could be getting a little toasty, tripping the temperature limit and disabling the drivers.  
> **username_0**: Quick update : I've added a 120mm fan on top to the BTT card. Everything sems cold now.  First I thought it was OK but I had it twice again with Z axis. I had it 5 times now. Only comes on long jobs (after at least 1 hour of precessing). Any clue is welcome...  username_0  

---

## 1 answers

### Answer by username_0 on 2022-12-22. Score: 3

I think I fixed the problem.

Marlin was configured in hybrid mode with stealth chop mode at low speed then spread cycle when the stepper goes faster.

I removed stealth chop and set spread cycle at any speed and it seems to be OK.

I could let the machine work for hours with no issue

> **Comments:**
> **username_1**: Nice to post your own answer, please don't forget to accept the answer! Thanks!  

---

