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Configuring LinuxCNC
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Configuration Tools
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Mesa Configuration Tool
Mesa Configuration Tool
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11 Oct 2024 20:43 #311833
by flyingbrick
What a great tool!!
I'm kinda stuck with the spindle on my machine too. 7i97. I just want one of the analogue outputs configured to output to the spindle.
Any help or direction appreciated
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11 Oct 2024 21:29 #311834
by PCW
Not directly MesaCT related but its best to use analog outs 4 or 5 for spindle control
because these channels have separate enables
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28 Nov 2024 08:28 #315441
by tommy
I have 7i95T + 7i78 as I need 7 axis to control (closed loop) + 1 pwm for spindle.
Which firmware is preferred in this case? Should I use the one that configures joint 5 on 7i95T as a pwm output and then use 2 axis on 7i78?
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28 Nov 2024 15:50 - 28 Nov 2024 17:54 #315473
by PCW
Do you need PWM or analog for the spindle?
If analog then using the 7I78s analog output would be best.
Here is 7I95T firmware for a 7I95T +7I78: (10 stepgens, 7 encoders, 3 sserial channels, analog spindle out on 7I78)
Last edit: 28 Nov 2024 17:54 by PCW.
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28 Nov 2024 18:58 #315484
by tommy
VFD only works with 0-10V so I planned to use PWM signal to voltage converter.
Does 7i78 output 0-10V analog directly?
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28 Nov 2024 23:05 #315494
by PCW
The 7I78 has a PWM to isolated analog output circuit.
It does require an external 10V source. Normally the VFD
supplies this. (its commonly used for the potentiometer)
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29 Nov 2024 07:30 #315516
by tommy
This are terminal connections on VFD:
So proper solution would be to take +10V Reference output on VFD, connect it to SPINDLE+ on 7i78 and Local voltage speed reference input (A1) on VFD and connect it with SPINDLE- on 7i78?
Any need to connect also 0V COMMON from VFD?
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29 Nov 2024 10:41 #315523
by tommylight
A1 goes to AOUT (or spindle out) on Mesa.
0V common goes to spindle-.
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Configuring LinuxCNC
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Configuration Tools
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Mesa Configuration Tool
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