Topics

1

General Mach Discussion / Spindle Speed Control Problem

« on: September 29, 2014, 04:46:35 PM »

Hi All,

I have been having a problem with my spindle control. Lets say I have some gcode with 4 jobs and 2 different tools.

Job 1 Profile with 1/4" bit, S14000 - Runs fine (machine stops, I change bit, and cycle restart for Job 2)
Job 2 - Pocket with 1/2" bit S9000 - Runs fine and moves on to Job 3
Job 3 - Pocket with same 1/2" bit S9000 - SPINDLE SPEED INCREASES TO 24000 (my max setting), the DRO reads 9000 like it is supposed to thou.
Job 4  - Profile with same 1/2" bit S9000 - SPINDLE CONTINUES TO RUN AT 24000

Also if I try to use the MDI and issue a S9000 command it does not bring the spindle speed down.
I also noticed if the spindle is running at any speed and I enter in a different RPM or Spindle Override % the spindle will increase to 24000.

So far as a work around I just run each job separately, which is a pain to load the new gcode each time.

Is there a Gcode I'm missing, a settting in my post processor, or a setting on the VFD???

I'm using BOBCad V27, Mach 3 (latest version), VFD for spindle control.

Thanks,

Chuck

2

General Mach Discussion / X and Y off by .080

« on: November 01, 2013, 09:43:20 PM »

Hi All,

I noticed a problem last night, I don't know that it is a Mach3 problem but thought I would start here. After setting the XYZ zero for a part I loaded my GCode and cut the part, milling some holes and a square in a piece of alum. The placement of the cuts looked off so I checked with a caliper and the X and Y were +.080. I tried reloading the Gcode and resetting the XYZ zero several times and the xy were still off. I was able to reload it one time and the xy were correct so I ran another test and it worked fine. Then I reloaded and reset again to test and the xy was off again.

Today I loaded a different GCode and noticed the same thing, the XY was off by +.080 (approx.)
I'm not sure where to start looking.

I'm using BobCAD V25, Gecko G540, Mach3. I was using an .125 end mill.

Suggestions? I can post the Gcode or anything else needed.

Thanks,

Chuck