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Author Topic: How to get rid of the THUMP during E-Stopping a G-Code Cycle.  (Read 3372 times)

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How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« on: December 15, 2009, 09:13:04 AM »
I'm sure many of you have experience this, during a g-code cycle process, be it Plasma, Router, Laser, Mill, or anything, at one point of time the CNC may face into accidental danger, and you may need to E-Stop Mach3.

I'm using steppers for plasma cutting, and everytime I e-stop, a thump at all 3 axis immediately brakes, and when i want to perform a recut, most probably I will not be at the exact stop of where I would like to continue or restart the cutting at.

Any ideas to remove the sudden shock-stop at my motor? thanks.

Charles
Re: How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« Reply #1 on: December 15, 2009, 09:42:04 AM »
Try Feed Hold

You can then have a look and then hit CYCLE to continue

Phil
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable
Re: How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« Reply #2 on: December 15, 2009, 09:43:14 AM »
If you do not require an immediate stop, use the Feed Hold instead.
If it is an EMERGENCY !!!!!, then Mach will treat it as such and stop at all cost....loosing steps or possibly even doing damage to the machine if done repeatedly. After all, it IS an emergency...right ?
Re: How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« Reply #3 on: December 31, 2009, 10:52:08 PM »
Because feed hold cant stop instantly... What I mean is: When I press Feed Hold, it doesn't pause immediately, instead it will run abit more of the G-code before it stops 100%.

Offline ger21

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Re: How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« Reply #4 on: December 31, 2009, 11:21:58 PM »
In General Config, Change "No FRO on Queue".

Also, what version of mach3 do you use? I think this was changed in recent versions??
Gerry

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JointCAM Dovetail and Box Joint software
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Re: How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« Reply #5 on: January 05, 2010, 03:13:05 AM »
if i change No FRO on Queue, i can't control the feedrate overrides. Mach3.042.029

Offline ger21

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Re: How to get rid of the THUMP during E-Stopping a G-Code Cycle.
« Reply #6 on: January 05, 2010, 09:14:51 AM »
You should be able to, but there'll be a delay before it actually changes. I think if you lower the lookahead, it'll decrease the delay.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html