Post Processing for tapping is strange.
Posted: Fri Nov 05, 2021 1:23 am
I'm having problems with setting up the post processor for applications that use an imperial mill but have to do metric tapping.
LinuxCNC uses G31.1. The stock post processor with VisualCAM has only EMC Inch
If we're using the inch post processor then a 6mmx1.0 tap should do a 20mm deep hole like this right?
N6 G31.1 X1.5748 Y0.3937 Z-0.7874 K0.0394
And if we're using a metric post processor then
N6 G31.1 X40. Y10. Z-20. K1.
Mixing metric taps with imperial post processor creates weird values where the 6x1mm tap has
N6 G31.1 X1.5748 Y0.3937 Z-0.787 K25.4001
I can see that the tap pitch in imperial has to be 0.0394" per rev. So what needs to be set into the config file so it creates the correct value?
LinuxCNC uses G31.1. The stock post processor with VisualCAM has only EMC Inch
If we're using the inch post processor then a 6mmx1.0 tap should do a 20mm deep hole like this right?
N6 G31.1 X1.5748 Y0.3937 Z-0.7874 K0.0394
And if we're using a metric post processor then
N6 G31.1 X40. Y10. Z-20. K1.
Mixing metric taps with imperial post processor creates weird values where the 6x1mm tap has
N6 G31.1 X1.5748 Y0.3937 Z-0.787 K25.4001
I can see that the tap pitch in imperial has to be 0.0394" per rev. So what needs to be set into the config file so it creates the correct value?