Violent jerking upon turning power off

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accurateeps

accurateeps
Hi everyone,



Lots of great info on here. Been reading for a week now. lol.

We are retrofitting a CNC EPS hot wire cutting machine. We have a Masso G3 controller with two DMM Dyn2 drivers with two DMM DHT57 motors. Just finished install and wiring. Power up is smooth and everything seems to be working. Powering off unfortunately isn't so smooth. As soon as we disconnect power the motors lurch the machine forward a bit. It does sound goos for the machine. When I disconnect the signal cables that connect to the DYN2 drivers to the Masso, then cycle power, it does not do the jerking thing.

Any help is appreciated.

Thank you.
 

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masso-support

masso-support

MASSO Support
Staff member
it sounds like some wiring issue that is causing floating signals being fed to the motor drives. can you please share a wiring diagram on how you have wired the axis signals from MASSO to your motor drives?
 
G

gmarsh1

gmarsh1
Perhaps it's just a labeling error, but you are showing the + and - of the 24v power supply going to wrong terminals on the Masso?
 
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accurateeps

accurateeps
lol. I noticed the positive and negative error just after posting the diagram. Working with little sleep as this machine and its our only source of income currently. E stop is wired correctly but shown incorrect on the diagram. sorry.
 
testyourdesign

testyourdesign

testyourdesign
@accurateeps

I believe you are the first person to post a question about that adapter board. Not sure if @arturoduncan has any input to offer here but I would be interested to hear what he says. It appears to be a new product for him so he might still be sorting it out. I was thinking of ordering one to use on my G3 controller as well since the RJ45 connections are a clean interface.

Cheers, Stephen Brown
 
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accurateeps

accurateeps
FYI, I am working with Arturo also to resolve this. I will definitely post the solution once this issue is located and resolved. Figured utilizing both resources at once will result in more knowledge shared.
 
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arturoduncan

arturoduncan
It seems you are powering off the system while the system is active. Try disabling the system, e-stop before disabling the system. Set the connector boards to SOFT enable, so that when the system is disabled, the motors are disabled.

Arturo Duncan

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