Mesa 5i25 direct to BOB questions

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6 years 4 months ago #173210 by currinh
GOT IT!

I remembered I needed to invert some signals to get LinuxCNC working with my parport version. So I started inverting pins in this Mesa install. I found that if the dir signals are inverted I get axis motion (and no motion if not inverted). There are options for each axis to make the motor motions reversed. I used this to get the axes going the right directions again.

It must be in the timing of direction changes. If anyone wants me to figure out why it's doing this please send some parameters to try. Although I question if testing with this very old BOB makes sense. I'm happy though, I think it's working. I'll have to test it for scale and do some tuning. It does feel more solid and the max speeds are improved already.

Thank you both for your insight and tips. Very helpful.

Stay well.

Hugh

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6 years 4 months ago #173215 by currinh
PCW:

The timing was set by selection Gecko G202 drives so I hadn't yet started to mess with them. pncconf gave this for the G202:
step time = 500
step space = 4500
dir setup = 1000
dir hold = 10000

I tried your suggested settings (5000,5000,20000,20000), although it only let me increase the 20000 to 10000. These worked without having to invert the dir signal. So that's the main problem.

I did use the readmid command to view pinouts. Also found the information in the hostmot2 files.

Thank you.

Hugh

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