6040 7i76 Conversion
- spacestate1
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08 Aug 2023 02:43 #277306
by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
ok interestingly enough if I wire it like this
VFD FWD -> PIN2
VFD 5vin -> PIN2
VFD GND -> PIN1
VFD 5vout -> PIN3
I can control the spindle speed from Linuxcnc
M3 S10000 gets it to about half speed (According the the VFD LDC)
Is this expected/ Safe ?
VFD FWD -> PIN2
VFD 5vin -> PIN2
VFD GND -> PIN1
VFD 5vout -> PIN3
I can control the spindle speed from Linuxcnc
M3 S10000 gets it to about half speed (According the the VFD LDC)
Is this expected/ Safe ?
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08 Aug 2023 02:48 - 08 Aug 2023 02:52 #277307
by PCW
Replied by PCW on topic 6040 7i76 Conversion
No, you should not connect a digital input (FWD for example)
to the analog output (TB4 pin 2)
FWD should connect to ENA+ and ENA- should connect
to VFD GND.
This is necessary so LinuxCNC can enable/disable the
drive
to the analog output (TB4 pin 2)
FWD should connect to ENA+ and ENA- should connect
to VFD GND.
This is necessary so LinuxCNC can enable/disable the
drive
Last edit: 08 Aug 2023 02:52 by PCW.
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08 Aug 2023 03:10 #277309
by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
I'm kind of at a loss at this point, maybe the VFS is mislabeled for a setting on it is not correct.
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08 Aug 2023 03:16 - 08 Aug 2023 03:17 #277310
by PCW
Replied by PCW on topic 6040 7i76 Conversion
With VFD FWD connected to
ENA+ and and VFD GND connected to ENA-,
what voltage do you read on VFD FWD
(relative to VFD GND)
when the spindle is enabled in LinuxCNC?
ENA+ and and VFD GND connected to ENA-,
what voltage do you read on VFD FWD
(relative to VFD GND)
when the spindle is enabled in LinuxCNC?
Last edit: 08 Aug 2023 03:17 by PCW.
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08 Aug 2023 11:54 #277324
by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
when enabled and spinning .614 v
when off and still 11.57v
when off and still 11.57v
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09 Aug 2023 01:00 #277385
by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
ALso does anyone know of a cheaper VFD for a 1.5kw spindle that might work better with the 7i76 card/Linuxcnc ?
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13 Aug 2023 12:36 #277820
by spacestate1
Replied by spacestate1 on topic 6040 7i76 Conversion
Just to complete this discussion, I bought a Huanyang VFD hooked it up with a guide here.
www.diycncdesign.com/linuxcnc-2.8-huanyang-vfd.html
Works, but not sure what was wrong with the old VFD, it works in manual mode fine. But the Huanyang is higher quality for sure.
www.diycncdesign.com/linuxcnc-2.8-huanyang-vfd.html
Works, but not sure what was wrong with the old VFD, it works in manual mode fine. But the Huanyang is higher quality for sure.
The following user(s) said Thank You: tommylight
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