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Climbing Z axis
« on: July 16, 2012, 04:50:28 PM »
 I'm having an issue with my Z axis slowly climbing out of my material as my relief file runs...it looks like it starts to climb around 50% of the file has run.
Question two I tried to run the file in reverse run to see if it happens in reverse but I can't seem to start the file in reverse. do I have to run the file all the way before I can reverse run? I attached the work after the scales of justice file ran
Thanks
Al

Offline ger21

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Re: Climbing Z axis
« Reply #1 on: July 16, 2012, 07:06:04 PM »
Reduce your Z axis acceleration by 50%.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Climbing Z axis
« Reply #2 on: July 17, 2012, 10:23:57 AM »
Thanks for the help Garry, cut it back from 30.6000 to 15.000 and it still started climbing 1/2 way through the file. it's almost seems after the motor heats up it begins to climb. do you think it could be a hot G540 controller?

Al

Offline Tweakie.CNC

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Re: Climbing Z axis
« Reply #3 on: July 17, 2012, 11:18:28 AM »
Hi Al,

Just out of curiosity, how hot is your motor getting ??

Tweakie.
KEEP SAFE !

Offline ger21

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Re: Climbing Z axis
« Reply #4 on: July 17, 2012, 11:40:00 AM »
The G540  must have a fan or heatsink on it. So yes, that could be the problem.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Climbing Z axis
« Reply #5 on: July 17, 2012, 12:36:11 PM »
motor gets to hot to hold on to. I put a set screw in the coupling Because I thought it was expanding and slipping a tad. I'll try the heat sink and fan.
 Al

Offline Tweakie.CNC

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Re: Climbing Z axis
« Reply #6 on: July 17, 2012, 12:40:30 PM »
Hi Al,

Reduce the current setting for that motor. It should be warm to the touch, during operation, but not as hot as you have described.

Tweakie.
KEEP SAFE !

Offline Tweakie.CNC

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Re: Climbing Z axis
« Reply #7 on: July 18, 2012, 01:35:46 AM »
Hi Al,

If it is any help a clip from the Gecko 540 manual.....

"If your motors are rated below 3.5A you must use a current set resistor across PIN 1 and PIN 5. The resistor is calculated by taking the current in amps and multiplying by 1000. If your motor is rated at 2.8A per phase you will have to use a 2.8K 5% 1/4W resistor. If your motor is rated at 3.5A or above you can safely not use a current set resistor; however, your G540 will not go into current standby mode which will result in increased motor heating".

Tweakie.
KEEP SAFE !
Re: Climbing Z axis
« Reply #8 on: July 19, 2012, 09:36:19 AM »
BAZINGA!!!!!! G540 to hot....mounted heat sink plus fan......back up and running.
Thanks Guys
Figula