Need firmware for Chinese BoB on Mesa 7i92

Alright, thanks so far. I rewired the BoB to match the 7i92_MX3660x2D.bit, except the 1pin encoder. I will remove the spindle-at-speed snippets and run it open loop until I get a second connector for the 7i92 or a firmware with a 1pin encoder.
Now on to the PWM output config for the spindle..

I noticed that I have to lower the probing speed to have the same accuracy as with a base thread. I guess I could lower the servo thread interval. Any other suggestions?

Shu wrote: I noticed that I have to lower the probing speed to have the same accuracy as with a base thread. I guess I could lower the servo thread interval. Any other suggestions?

The stepgens don't offer a latch-enable pin (though to do so would be plausible) so you are right that the probing speed needs to be lower to get the same accuracy.
A way to maintain probing speed might be to probe fast to contact then slowly away from contact.

Actually both the encoders and the stepgen have a latch on probe option but its not supported in the driver yet
(its tricky since it requires changes to the motion module to do right)

Are you sure there's any difference in probing accuracy?
motion is run in the servo thread and the AFAIK feedback position is sampled by motion at the servo thread rate
to get the probe position

I didn't verify it, was just a quick test and my thinking as I had the probe input in the base thread. Will try again when I have the spindle PWM set up.

You can sample the probe input in the base thread but motion only looks at it (and latches the position) at the servo thread rate

PCW wrote:

I'll try to get to this sometime this week
 

So, did you create firmware for this setup? I am using this BoB´s in several machines, I would like to switch to driving them by 7i92, but cant find proper pinout in 7i92 firmwares file downloaded from your pages. Or whats the name of file with this pin setup?

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ParPortPin Function
1 Enable
2 xstep
3 ydir
4 (-I dont need-) SpindlePWMout (creating a 0-5V signal for the VFD with a buffer and low pass filter from this pin)
5 adir
6 astep
7 zstep
8 zdir
9 (-I dont need-)
10 max-home-z
11 min-home-x-and-y
12 (-I dont need-) SpindleSensorIn (RPM sensor, 4 pulse per revolution)
13 probe-in
14 xdir
16 ystep
17 CoolantEnable