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General Mach Discussion / Z-axis goes deeper dan indicated by G-code file

« on: December 28, 2014, 01:44:29 PM »

I have a strange problem with Z-axis controle.
When I load in the G-code file everything looks normal, Z-range is between +12 and -18.29 as expected.
When Mach runs the file, Z-axix goes deeper than -18.29, it goes down to -19.********* so I stopped the machine in order not to damage the fixture.
The indication on the Z dro is consistent withZ-axix positions, so it indicates -19.********* as well, so no calibrating problem.
All offsets are 0.
It's a fresh installation ( a few weeks) and the tool is a straight MDF one with square edges.
X and Y seems to be normal.
The same problem occurs with another G-file where it goes over 2mm deeper than it should, again I stopped the machine.
Again DRO indication and Z position are consistent. Retracts are too low so the tool hits allready milled areas on aproaching the end of the job.

2

General Mach Discussion / MACH3 pendant keyboard doesn' t work.

« on: September 25, 2014, 07:50:01 AM »

I have a USB pendant keyboard which I bought from a Chinese seller who claimed it would work for Mach3.
It emulates jog xyz, jog rate  and a few other functions.
Everything works except jog rate.
When I push "Jograte down" Jograte goes up, and when I push"Jograte up" nothing happens.
Clearly the transmitted codes are incorrect and I cannot find a way to change the MAch3 hotkey codes. Some programs I downloaded (screentweak, machscreen ) always seem to have the wrong version number to enable me to do what I have to do(change hotkeys in Mach3).
The pendant transmits code 221 for "jograte down" and 187 for "jograte up" and I think Mach3 expects code 221 for "jograte up" and 219 for "jograte down" whenI'm not mistaken.
So does anyone know a method to make this work?