# Belt loose / e-stopping / G0 maybe?

**URL:** <https://forums.maslowcnc.com/t/belt-loose-e-stopping-g0-maybe/24441>\
**Category:** Troubleshooting\
**Created:** [June 26, 2025, 7:23pm UTC](https://forums.maslowcnc.com/t/belt-loose-e-stopping-g0-maybe/24441 "2025-06-26T19:23:33Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![ian\_ab](https://avatars.discourse-cdn.com/v4/letter/i/a587f6/32.png) [@ian\_ab](https://forums.maslowcnc.com/u/ian_ab)\
**Post date:** [June 27, 2025, 10:07pm UTC](https://forums.maslowcnc.com/t/belt-loose-e-stopping-g0-maybe/24441/15 "2025-06-27T22:07:45Z")

</div>

This is similar to a problem I had earlier and confirms diagonal movements with G0 suspect:

> [@Emergency Stop-Initial G-Code run](https://forums.maslowcnc.com/t/emergency-stop-initial-g-code-run/24043/3):
>
> I then modified the code so M4 went left and then up instead of diagonally.  
> Code Segments around line 627 of  
> [2.nc](https://forums.maslowcnc.com/uploads/short-url/tl9XArva7qop2qhAhthdpvFyReL.nc) (62.0 KB)  
> [2b.nc](https://forums.maslowcnc.com/uploads/short-url/bSorYr7rBUHKsoqSjNPD3YfczvO.nc) (62.0 KB)
> 
> ; Relevant segment of before code 2.nc
> 
> g1 x1313.98640167 y18.75662029 f2000  
> g0 z5  
> g0 x154.04791319 y1190.01358752  
> g1 z-3 f400  
> g1 x159.30857818 y1183.6382884 f2000
> 
> ; Corresponding segment after modification (2b.nc)
> 
> g1 x1313.98640167 y18.75662029 f2000  
> g0 z5  
> g0 x154.04791319 y18.75662029 ; f2000 **This line added**  
> g0 x154.04791319 y1190.01358752  
> g1 z-3 f400  
> g1 x159.30857818 y1183.6382884 f2000
> 
> This did not cause an error, so I reset Z and redid the cut without the error occurring.

Sending the M4 sideways & then up fixed the problem for me. I think it must be related to the M4 belts not being able to keep up when processing G0 diagonals

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