which postprocessor for mach3 controlled machines

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GeneFC
Posts: 692
Joined: Sat Mar 19, 2016 3:36 pm
Location: Punta Gorda, FL

Re: which postprocessor for mach3 controlled machines

Postby GeneFC » Wed Oct 10, 2018 4:20 pm

outchips wrote:
Wed Oct 10, 2018 2:21 pm
These commands are not in the LinuxCNC files
For good reason. :roll:

Those commands are mutually exclusive. G90.1 calls for absolute mode in defining arc centers I, J, and K, while G91.1 calls for relative mode.

G91.1 is the default.

I have never added either, and I have processed a lot of circles and arcs.

If you call "G90.1 G91.1", as you have shown, you simply are re-selecting the default behavior.

Gene
chrisb
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Joined: Tue Mar 17, 2015 9:14 am

Re: which postprocessor for mach3 controlled machines

Postby chrisb » Wed Oct 10, 2018 7:58 pm

Perhaps there are machines that require the standard to be explicit?
GeneFC
Posts: 692
Joined: Sat Mar 19, 2016 3:36 pm
Location: Punta Gorda, FL

Re: which postprocessor for mach3 controlled machines

Postby GeneFC » Thu Oct 11, 2018 12:24 am

I am certain that Linuxcnc does not require anything explicit in that regard, and I believe Mach 3 also uses relative arc centers as a default.

In any case, using two opposite commands in a row is not necessary.

The "machine" is not important if we are talking about Linuxcnc and Mach 3. As for other controllers, I have no idea.

Gene