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Home Forum Configuring LinuxCNC PnCConf Wizard 7i43 + 7i39

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TOPIC: 7i43 + 7i39

Re:7i43 + 7i39 21 Fév 2012 14:56 #17922

  • PKM
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Thank you, Chris, I tried the xml and got a config.
When I connect the motors I can try it.

I see that something important is missing in HAL for every axis:
# ---TPPWM Generator signals/setup---
# three output 3pwg
# TODO write some commands!

Should it be 3pwmgen here? Maybe something like

setp hm2_7i43.0.3pwmgen.00.scale [AXIS_0]OUTPUT_SCALE
setp hm2_7i43.0.3pwmgen.00.fault-invert 1
net pwm.00-a bldc.0.A-value => hm2_7i43.0.3pwmgen.00.A-value
net pwm.00-b bldc.0.B-value => hm2_7i43.0.3pwmgen.00.B-value
net pwm.00-c bldc.0.C-value => hm2_7i43.0.3pwmgen.00.C-value

I'm so confused with all these signals :unsure:

Is that correct with setp hm2_7i43.0.3pwmgen.00.fault-invert 1, Peter?
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Re:7i43 + 7i39 21 Fév 2012 15:00 #17923

  • PKM
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Maybe the generated config will be useful, to see what's missing
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(I have no Halls so I checked only Encoders and Index)
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Last Edit: 21 Fév 2012 15:06 by PKM.
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Re:7i43 + 7i39 21 Fév 2012 18:10 #17927

  • PCW
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Yes fault_invert should be set
(this is because the fault input is unused (unconnected to an I/O pin)
and by default all unused input pins are terminated at '0' inside the FPGA)
so you want the fault input to be active high.

Otherwise you will have a continuous fault and therefore no PWM out
Last Edit: 21 Fév 2012 18:15 by PCW. Reason: ommission
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Re:7i43 + 7i39 13 Avr 2012 15:44 #19180

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Hello again,
I already have my linear motors (with no Halls).
And I'm still worried by these lines in generated .hal file
# ---TPPWM Generator signals/setup---
# three output 3pwg
# TODO write some commands!
What should be here?
There's new bldc_sine component in 2.5.0, how can I use it?
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Re:7i43 + 7i39 14 Avr 2012 07:52 #19199

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Not sure about pncconf but AFAIK bldc_sine is obsolete, its function being taken over by the more capable bldc comp
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Re:7i43 + 7i39 14 Avr 2012 08:06 #19200

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Strange... From 2.5.0 changelog:
HAL: new component bldc_sine: commutation for BLDC with encoder feedback
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