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Author Topic: Mach3 Axis Calibration Mystery  (Read 10146 times)

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Offline Tweakie.CNC

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Re: Mach3 Axis Calibration Mystery
« Reply #30 on: April 15, 2017, 01:42:28 AM »
Hi Anders,

I think you have demonstrated that this is not a Mach3 problem.

I am not certain that you are using CanBam correctly, because there are many users here and there has not been another identical reported problem.

The latest Gcode that you have posted has some of the arcs drawn in Absolute and some of the arcs drawn in Incremental - basically your Gcode contains a mixture of standards which cannot be processed by Mach3 without the appropriate G90.1 / G91.1 being added throughout the code (almost from line to line in some places).

What is it, I wonder, that you are doing with CamBam that is different to everyone else. ??

« Last Edit: April 15, 2017, 02:49:47 AM by Tweakie.CNC »
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline RICH

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Re: Mach3 Axis Calibration Mystery
« Reply #31 on: April 15, 2017, 11:18:50 AM »
I agree it's not a Mach problem.

Did a quick try of the posted WOODWAVY SECTION 1A.dxf and generated
a profile code for the complete dxf from Cambam and no arc problems here.
See attached screen shot QUICK TRY RICH.


Suggest you try generating code for just a small part of dxf
in Cambam.That makes it easier to look into what the problem may be.
ie; see SMALL PART OF DXF pic attached as an example.

The code for that pic is attached....TEST3 RICH.
It is just the a small part of your original nc file and
just added line numbers and commented out the problematic lines
280, 290, 310, 320.Note that there is no problem with most of the code.

If the g2 or g3 coding is not correct you can get crop circles etc.
and that can be due to number of things.

You can compare how it's drawn and how Cambam interprets each arc or line
if you have the time and want to investiagte. Cambam provides info on each
arc and line of the drawing. 

Suggest you  quickly generate code for a profile (with and with out offsets) and engrave and see how it goes.

Take Care,