Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Jeff K on September 15, 2010, 12:17:51 PM
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This is my first post, so please excuse any errors I might be making. My problem is in the use of CamBam's Gcode in Mach 3. The Gcode is running, but the toolpath window does not show the toolpath itself. Loading the famous Roadrunner or any other .tap file, there seems to be no problem. Incidentally, loading a new .tap Gcode overwrites the old, but this is not so with the .nc files. Only exiting the software and reexecuting will allow loading of new Gcode. As a newbie, I would appreciate any help and comments. Thanks, Jeff
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Sounds like there may be an error in the code so Mach is not loading it as it found that error.
Have a look at the message bar down near the bottom of the Mach screen and see if there is a message there telling you of the error.
Hood
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Actually forget that, have just read again and see you say the code is running.
Could it be that it is way off view on the screen, ie the coords are way to the side? What happens if you press the Regen button?
Can you attach the code so someone can load it and maybe find the problem.
Hood
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Next to Status, it reads "Radius to end of arc differs from radius to startLine 52".
Pressing Regen does nothing.
The file is from CamBam site as a download @ http://www.cambam.co.uk/docs/gettingstarted/stepper-mount.html
Finally the code is attached. Again, I hope I've posted this correctly. Sorry if I haven't
Thanks for your help. Regards, Jeff
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Ok it is throwing an error, try changing the IJ mode on General Config page and then regenerating and see if that cures it..
Hood
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Cure it, it did, and I thank you. I checked IJ in the documentation, and frankly, I haven't a clue what the description means. If you have the time, could you put it in simple terms for me? I'm not one to just leave things alone until I've at least tried to understand them (sometimes ending in failure, but at least I've tried). If you don't have the time, I understand, and again I thank you for all your help. Best regards, Jeff
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I am probably not the best to describe exactly what it does as I dont really know myself ;D
Basically though it is either Absolute or Incremental, for example if you were at X50 and commanded a move of X2 when in absolute it would move to X2, if you were in incremental mode it would move to X52 as it is incrementing by the value you commanded. The IJ mode is for arcs so it would be the same idea with Absolute or Incremental but just on an arc.
Hood
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Perhaps not the best, but good enough for me. I appreciate your time and effort. Thanks again. Jeff
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No probs :)
Hood
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Have a look at the ARC MOTION write up in Members DOCS, page 1 &2, relevant, even though it's for the lathe.
Figure 9 on page 6 shows influences which can have an affect.
RICH
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Also make sure you select the 'mach 3' post processor in CamBam. The generic one works 99% of the time, but the Mach one is fine tuned to play well with Mach's defaults.
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I and J are the XY coordinates of the arc center. Absolute mode uses the exact coordinates. Incremental specifies the center relative to the start of the arc.
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Thanks to all who responded. I still have a lot to learn, but I'm getting there. I appreciate all your help.
Best regards to all.
Jeff