# Tolerance and accurate cuts

**URL:** <https://forums.maslowcnc.com/t/tolerance-and-accurate-cuts/14592>\
**Category:** No Judgement\
**Created:** [September 9, 2020, 3:10pm UTC](https://forums.maslowcnc.com/t/tolerance-and-accurate-cuts/14592 "2020-09-09T15:10:50Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![md8n](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/md8n/32/28197_2.png) [@md8n](https://forums.maslowcnc.com/u/md8n)\
**Post date:** [September 11, 2020, 11:46am UTC](https://forums.maslowcnc.com/t/tolerance-and-accurate-cuts/14592/23 "2020-09-11T11:46:57Z")

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> [@Orob](#):
>
> The only way to stop a runaway sled is to kill the power.

I made myself a proper emergency cut-off switch because of this:

> [@Emergency Cut-Off Switch + Power Board](https://forums.maslowcnc.com/t/emergency-cut-off-switch-power-board/11639):
>
> OK - So as per a comment of mine some time ago I finally made and fitted an Emergency Cut-Off switch, along with an integrated power board. Here it is after fitting the switches, but before wiring up. I had some ‘fun and games’ cutting this 5.2mm ply, not the least of which was a loss of calibration (home) midcut. So I had to start again after recalibration and line everything up by eye (about 2mm off). Plus my current router isn’t working out as well as I’d hoped. …

I’m not comfortable using industrial equipment without one. Although when I tested it I sometimes had to re-calibrate.

Also, please switch to webcontrol (and holey calibration) at least until the new-new stuff comes out. It’s definitely more ‘friendly’

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