Spindle Control using Chinese BOB with blue relay (solved)

Clive S
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6 years 5 months ago #169145 by Clive S

Spindle Control using Chinese BOB with blue relay (solved) was created by Clive S

Using the standard Chinese BOB with the blue relay I have this working of sorts

Problem as the speed goes up the volts on the output 0-10v goes down .

How do I calibrate it for 2400 rpm spindle with vfd
What would be sane values for the scale, offset, pwm-freq etc.

I am imputing 22V + 5V with the ground connected

Code:

####  Spindle stuff  ###

net spindle-cmd-rpm     => pwmgen.0.value
net spindle-on     <= spindle.0.on =>     pwmgen.0.enable
net spindle-pwm       <= pwmgen.0.pwm
setp pwmgen.0.pwm-freq   100
setp pwmgen.0.scale    1000
setp pwmgen.0.offset     0.1

setp pwmgen.0.dither-pwm true

net spindle-cmd-rpm     <= spindle.0.speed-out
net spindle-cmd-rpm-abs <= spindle.0.speed-out-abs
net spindle-cmd-rps     <= spindle.0.speed-out-rps
net spindle-cmd-rps-abs <= spindle.0.speed-out-rps-abs
net spindle-at-speed    => spindle.0.at-speed
net spindle-cw <= spindle.0.forward

###  Parport Pins  ###

net spindle-pwm     => parport.0.pin-01-out
net spindle-cw        => parport.0.pin-14-out
net spindle-on         => parport.0.pin-17-out

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Mike_Eitel
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6 years 5 months ago #169149 by Mike_Eitel

Replied by Mike_Eitel on topic Spindle Control using Chinese BOB with blue relay

For your invertion:
I'm not sure but believe there is a way to invert the output. Try with negative scale

Second version is that you invert your output parport.0.pin-01-out via
See doc: parport.<p>.pin−<n>−out−invert (bit) Inverts an output pin.

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Clive S
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6 years 5 months ago #169151 by Clive S

Replied by Clive S on topic Spindle Control using Chinese BOB with blue relay

Thanks I have tried putting the scale -ve I will try changing the parport pin.

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Clive S
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6 years 5 months ago #169214 by Clive S

Replied by Clive S on topic Spindle Control using Chinese BOB with blue relay

Clive S wrote: Thanks I have tried putting the scale -ve I will try changing the parport pin.

Ok I have now tried net spindle-pwm => parport.0.pin-01-out-invert 1 that throws an error (it is shown in the 2.7 docs but not 2.8 that I can see)

Please see the first post for my problem

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tommylight
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6 years 5 months ago #169223 by tommylight

Replied by tommylight on topic Spindle Control using Chinese BOB with blue relay

parallel port outputs are inverted using setp
so
setp parport.0.pin-01-out-invert 1

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Clive S
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6 years 5 months ago #169232 by Clive S

Replied by Clive S on topic Spindle Control using Chinese BOB with blue relay

tommylight wrote: parallel port outputs are inverted using setp
so
setp parport.0.pin-01-out-invert 1

As above Tom that throws an error with pin does not exist it probably exists in 2.7 I am using 2.8

Edit My bad I was not using setp

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tommylight
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6 years 5 months ago #169233 by tommylight

Replied by tommylight on topic Spindle Control using Chinese BOB with blue relay

setp parport.0.pin-01-out-invert 1
Works for me on 2.9
It has to be above the pin 1 in hal
like so
setp parport.0.pin-02-out-invert 1
net xstep => parport.0.pin-02-out

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Clive S
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6 years 5 months ago #169235 by Clive S

Replied by Clive S on topic Spindle Control using Chinese BOB with blue relay

tommylight wrote: setp parport.0.pin-01-out-invert 1
Works for me on 2.9
It has to be above the pin 1 in hal
like so
setp parport.0.pin-02-out-invert 1
net xstep => parport.0.pin-02-out

sorry, sorry , sorry my bad I was trying spindle-pwm => parport.0.pin-01-out-invert 1
but I had to do setp parport.0.pin-01-out-invert 1 and missed it.

Now that get me the 0-10v going up as the speed change goes up

setp pwmgen.0.pwm-freq 100
setp pwmgen.0.scale 24000 setting this gets me the 24K on the vcp display

setp pwmgen.0.offset 0.1 What does this do

setp pwmgen.0.dither-pwm true

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tommylight
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6 years 5 months ago #169237 by tommylight

Replied by tommylight on topic Spindle Control using Chinese BOB with blue relay

Clive S wrote: setp pwmgen.0.offset 0.1 What does this do

It just sets the output a bit higher than 0 , so when you start the spindle it does not start at 0RPM.

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