6040 7i76 Conversion

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08 Aug 2023 00:00 - 08 Aug 2023 00:02 #277292 by PCW
Replied by PCW on topic 6040 7i76 Conversion
OK so when LinuxCNC is _not_ running (but VFD is powered)

What do you measure at:
TB4 PIN 3 (SPIN+)
and TB4 PIN 2 (SPINOUT)
relative to TB4 PIN 1 (SPIN-)?
Last edit: 08 Aug 2023 00:02 by PCW.

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08 Aug 2023 00:20 #277293 by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
TB4 PIN3(pin+) -> TB4 PIN2 = 4.98v
TB4 PIN2(spinout) -> TB4 PIN1 (SPIN-) = 0v
TB4 PIN3 -> TB4 PIN1 = 4.98 v

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08 Aug 2023 00:32 #277294 by PCW
Replied by PCW on topic 6040 7i76 Conversion
OK, that's the expected output
If you just start LinuxCNC do these change?

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08 Aug 2023 00:35 #277295 by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
no they do not

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08 Aug 2023 00:58 #277297 by PCW
Replied by PCW on topic 6040 7i76 Conversion
OK So if you enable the spindle forward (M3) a at say 1/2 of full speed,
what voltage do you get at TB4 pin 2 relative to TB4 pin 3?

With the same settings, what does

halcmd show all | grep spinout

report?

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08 Aug 2023 01:25 #277298 by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
so when G3 S10000 is enabled :

PIN1 -> PIN2 = 2.42
PIN1 -> PIN3 = 4.98
PIN2 -PIN 3 = 2.55


HALcmd

halcmd show all | grep spinout
    36  float IN              0  hm2_7i92.0.7i76.0.0.spinout <== spindle-output
                         ==> hm2_7i92.0.7i76.0.0.spinout
    36  float RW           3000  hm2_7i92.0.7i76.0.0.spinout-maxlim
    36  float RW              0  hm2_7i92.0.7i76.0.0.spinout-minlim
    36  float RW           6000  hm2_7i92.0.7i76.0.0.spinout-scalemax

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08 Aug 2023 01:29 #277299 by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
halcmd while running

halcmd show all | grep spinout
36 float IN 3000 hm2_7i92.0.7i76.0.0.spinout <== spindle-output
==> hm2_7i92.0.7i76.0.0.spinout
36 float RW 3000 hm2_7i92.0.7i76.0.0.spinout-maxlim
36 float RW 0 hm2_7i92.0.7i76.0.0.spinout-minlim
36 float RW 6000 hm2_7i92.0.7i76.0.0.spinout-scalemax

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08 Aug 2023 01:56 #277301 by PCW
Replied by PCW on topic 6040 7i76 Conversion
So that's about the expected output (1/2 of full scale)
(note that you can only get to 1/2 scale at 3000 with your current settings)

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08 Aug 2023 02:15 #277304 by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
ok but the spindle isn't actually moving. Is that intentional. Also these are the only three wires I have hooked up between TB4 and the VFD.

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08 Aug 2023 02:26 - 08 Aug 2023 02:26 #277305 by PCW
Replied by PCW on topic 6040 7i76 Conversion
It should be running if:

 FWD is asserted (pulled low)
and 5VIN has some voltage other than 0

(and the VFD is working and programmed correctly)
Last edit: 08 Aug 2023 02:26 by PCW.

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