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General Mach Discussion / Re: Spindle no longer crashes Mach3, but doens't stay on...
« on: February 21, 2010, 11:06:31 AM »
Hi Glen,
Difficult to tell without looking at your installation.
The casing of my VFD (the heatsink) is bolted directly to my machine frame and is therefore grounded by this fixing so the incoming supply to it does not contain a ground connection. The output from the VFD is made with shielded cable, grounded at the VFD end but not at the motor end but the motor is itself grounded by being bolted to the machine frame. My machine frame and the computer casing are the only parts which are directly connected to earth protective ground and the screen of the LPT cable does not connect the two parts. So everything is ultimately connected to ground without loops and all works well.
Hope this helps,
Tweakie.
Difficult to tell without looking at your installation.
The casing of my VFD (the heatsink) is bolted directly to my machine frame and is therefore grounded by this fixing so the incoming supply to it does not contain a ground connection. The output from the VFD is made with shielded cable, grounded at the VFD end but not at the motor end but the motor is itself grounded by being bolted to the machine frame. My machine frame and the computer casing are the only parts which are directly connected to earth protective ground and the screen of the LPT cable does not connect the two parts. So everything is ultimately connected to ground without loops and all works well.
Hope this helps,
Tweakie.