Receiving encoder signals but can get any rotation as a spindle

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2 years 4 months ago #303626 by Dave2024

I want to send you a gift or something about this if I could!
That is easy, just buy more Mesa boards ! :)
PCW is the owner of Mesa.
Really?  Thats awesome.  I will buy more of them too and promote them.  These are nice bords!

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2 years 4 months ago #303629 by Dave2024

The pncconf bug is just related to LinuxCNC version
but easily fixed by editing the hal file

The speed limit is likely because your 10000 steps/turn scale
would require very short step length and step space settings.

That is, to get to 5000 RPM at 10000 steps per turn, you need
833333 steps per second but your current step length and stepspace
settings (5 usec and 5 usec) only allow 100000 steps per second or
about 600 RPM.

Fixes: Reduce the drives steps/turn and or shorten the steplength
and stepspace parameters (noting the drives minimum timings
for these parameters and leaving adequate margins )
Holy crap I changed the steps/turn down from 10000 to 1k and omg!  The motor is dangerous!  How do I make it slowly ramp up and slowly slow down?   How do I get it to match speeds of M3 S500 = 500rpm and so forth perfectly matching this is incredible.  Wow 

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2 years 4 months ago #303640 by tommylight

How do I make it slowly ramp up and slowly slow down? 

Since this is a stepgen spindle, probably by setting stepgen acceleration in the ini file lower, in your case for stepgen 4.

 How do I get it to match speeds of M3 S500 = 500rpm and so forth perfectly matching

Again in the ini file, scaling, if no encoder feedback that would be step_scale, if with encoder feedback there are two values = step_scale and encoder_scale

this is incredible.  Wow 

Welcome to the dark side! :)

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