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Simple spindle configuration (mill)

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5 years 3 weeks ago - 5 years 3 weeks ago #222836 by step4linux
Simple spindle configuration (mill) was created by step4linux
hello,
I built a pretty straight forward router with xyz steppers and a spindle driven by a VFD based on LinucCNC 2.8, gmoccapy and a MESA 7i76. I made the configuration by pncconf and It works well so far, but there is one remaining thing a could not completely finish:
I can switch on and off the spindle in both directions in manual mode and by gcode. But I do not understand how to scale the analog output of the MESA 7i76. Did I something miss in pncconf? Is there any useful documentation on that topic?

pncconf created the following lines in hal and ini:
Code:
net spindle-on hm2_7i76e.0.7i76.0.0.spinena net spindle-ccw hm2_7i76e.0.7i76.0.0.spindir net spindle-vel-cmd-rpm-abs hm2_7i76e.0.7i76.0.0.spinout net spindle-vel-cmd-rps <= spindle.0.speed-out-rps net spindle-vel-cmd-rps-abs <= spindle.0.speed-out-rps-abs net spindle-vel-cmd-rpm <= spindle.0.speed-out net spindle-vel-cmd-rpm-abs <= spindle.0.speed-out-abs net spindle-on <= spindle.0.on net spindle-cw <= spindle.0.forward net spindle-ccw <= spindle.0.reverse net spindle-brake <= spindle.0.brake net spindle-revs => spindle.0.revs net spindle-at-speed => spindle.0.at-speed net spindle-vel-fb-rps => spindle.0.speed-in net spindle-index-enable <=> spindle.0.index-enable [SPINDLE_9] P = 0.0 I = 0.0 D = 0.0 FF0 = 1.0 FF1 = 0.0 FF2 = 0.0 BIAS = 0.0 DEADBAND = 0.0 MAX_OUTPUT = 2000.0

thank you for any help, kind regards, Gerd
Last edit: 5 years 3 weeks ago by step4linux.

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5 years 2 weeks ago #222965 by tommylight
Replied by tommylight on topic Simple spindle configuration (mill)
This is just one of the examples from a machine i retrofited a while ago, first part .ini second part is from .hal.
Code:
DEADBAND = 0.0 MAX_OUTPUT = 6000.0 ENCODER_SCALE = -1024.0 OUTPUT_SCALE = 6000 OUTPUT_MIN_LIMIT = -6000 OUTPUT_MAX_LIMIT = 6000
Code:
setp   hm2_7i92.0.7i77.0.1.analogout5-scalemax  [SPINDLE_9]OUTPUT_SCALE setp   hm2_7i92.0.7i77.0.1.analogout5-minlim    [SPINDLE_9]OUTPUT_MIN_LIMIT setp   hm2_7i92.0.7i77.0.1.analogout5-maxlim    [SPINDLE_9]OUTPUT_MAX_LIMIT
www.youtube.com/@toma.cnc1
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www.youtube.com/@tomapc
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5 years 2 weeks ago - 5 years 2 weeks ago #222971 by 0x2102
Replied by 0x2102 on topic Simple spindle configuration (mill)
Just to add on to what "tommylight" wrote....

The 7i76e doesn't provide 0-10v output like a 7i77 for example. Not sure if that is clear. You will need to connect an isolated power supply (e.g. 12V to Spindle+ and GND to Spindle-).

The result is a potential "SPINDLE OUT" output of 0-12V. Most drives require 0-10V and you need to scale the output.

TB4 PIN:
1 SPINDLE-
2 SPINDLE OUT
3 SPINDLE+

Example:
Spindle has 24000rpm @10V, Output Scale will tell LCNC that 100% or 12V output equals 28800. We just need 10V for 24000 rpm.

MAX_OUTPUT = 24000
OUTPUT_SCALE = 28800
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 24000

PS: Forgot to mention, some VFD's provide 10V / GND for 7i76e - in this case OUTPUT_SCALE = MAX_OUTPUT
Last edit: 5 years 2 weeks ago by 0x2102.
The following user(s) said Thank You: step4linux, tommylight

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5 years 2 weeks ago #223062 by step4linux
Replied by step4linux on topic Simple spindle configuration (mill)
thank you guys, it appears now to work!
yes I understand the concept of the 7i76e hardware, this was the simple point :-). The VFD has a 5Vout and a 5Vin terminal to connect the "potentiometer" of the 7i76e.

I add the following to hal:
setp hm2_7i76e.0.7i76.0.0.spinout-scalemax 24000
setp hm2_7i76e.0.7i76.0.0.spinout-maxlim 24000
setp hm2_7i76e.0.7i76.0.0.spinout-minlim 0

Of course it would be possible to do it via INI, but still you need some lines like above in hal to get the values from INI. I am wondering why there is nothing like this from pncconf.

regards Gerd

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