Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Sirsparksalot on December 03, 2018, 12:21:43 PM
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ok long story short I've been using mach 3 since July on a new cnc router without issue until a few weeks ago when it has started randomly plunging the Z axis through work piece into the table breaking bits and trashing the sheet . i have ran it for months 8-10 hrs a day without issue till just recently, running the same exact programs from before the issue started. i havent changed a single setting other than the rapid speeds between cuts . also if it makes a difference i am doing all my designing and g-code generation with V-carve9.0
any help would be greatly appreciated ......this is costing me a fortune in bits and wood!
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Hi,
I would guess that it is missing steps and/or being affected by electrical noise.
Electrical noise can and often does come and go, usually as a result of some very subtle change, maybe a wire shifting or similar.
Craig
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it has started randomly plunging the Z axis through work piece into the table breaking bits and trashing the sheet .
Another possibility is mechanical slippage in the Z axis drive components.
The slide mechanism can get gummy over time requiring more effort to raise the motor assembly. This along with an increase in rapid speed and/or acceleration can overpower the pulley or shaft coupling set-screws. Might pay to double check the mechanical aspects as well.
Russ
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Ok after a lengthy phone conversation with the company who sold me the machine and some switching of cables we have apparently rectified the situation and have ran two solid days without a glitch ! Thank you for the info