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The image below is where I'm getting the idea to use Stepgen to convert my fanuc encoder data to AB quadrature for outputting to the drives, but I could use some insight as to whether or not it will function or if I'm missing some important details.. Does anyone know?  



Within the HAL, is there a possibility of connecting the fanuc encoder data position output to the 'position in' port of Stepgen as it runs in quadrature output mode, to then output the quadrature pulses to my AB Ultra3000 drives to provide the position feedback to them? Or is there some major flaw in this concept.. 

Thanks

This machine had a Burny controller so unfortunately no hal scope What I had was my portable scope, that's it.

If you compare my plot to yours, you have 50V/div if I look at it correctly. You can see my capture tops at around 400-450V so that would be already out of your display range? Maybe it is roughly the same?

PCW wrote:

If you measure from the work to signal ground with a GHz capable scope at say 1ns/per division,
You will see fractional ns spikes of significant voltage on the work (or low end of divider)  
( arc starting is instantaneous an even if the current ramp is controlled, the plasma wiring
has significant capacitance)
 

Ok, yeah that can make sense. Its something I can't test so I will take you word for it. My original point was that I thought that having 500V OVP on the divided signal was an exaggeration.

yeah sorry about the typo in the title. should have been 2.10

checked that motion.is-all-homed is TRUE , then had one last prod of the buttons, and the axis does jog on the wheel.
Only if both my plus and minus buttons are pressed together.
With both pressed the scale is .0001

What I really want to do is with those buttons is to duplicate what the rapid plus and minus do on the Axis gui

my1987toyota wrote:

Take care rodw. that kind of weather is no joke. hopefully damage will be minor. Prep for the worst, hope for the best.

+1

Shit mate didn't know it was that bad up there.

We Gunna have to send truck & dogs and bobcats up again to help with the cleanup ?

You could always choose not to run them.
Or you could run them when not machining a part.
Why is it when I hear the word "maker" I envisage some hipster with soft hands, a man bun and a manicured beard ?

I know, cos I'm a cranky old bastard who's one step away from yelling at clouds, I've already got the yelling at tv and birds covered.

Thank you so much! I will certainly give it a try. I have been monitoring your github page for quite a while in anticipation of your great work, so this is big news!

As for Clear Linux, I believe they finally got it working on their distro, but made it part their maker-cnc bundle, which includes programs like inkscape and OpenSCAD, which are great apps but should not run on a machine controller. They do not seem to fully understand the LinuxCNC ecosystem, so I have already lowered my expectation (or should I say hopes?).

Take care rodw. that kind of weather is no joke. hopefully damage will be minor. Prep for the worst, hope for the best.