7C80
02 Feb 2019 01:32 - 02 Feb 2019 02:52 #125514
by blazini36
Last edit: 02 Feb 2019 02:52 by blazini36.
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11 Feb 2020 22:42 #157105
by alkabal
Hi
I'm thinking about ordering RPI4 + Mesa 7c80 for retrofit a mini mill
Did you know if this is possible to output PWM for control spindle with DAC using regular output or step output ?
i know this board include a digital dedicated circuit but i like to know if i can use other output.
Br
I'm thinking about ordering RPI4 + Mesa 7c80 for retrofit a mini mill
Did you know if this is possible to output PWM for control spindle with DAC using regular output or step output ?
i know this board include a digital dedicated circuit but i like to know if i can use other output.
Br
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11 Feb 2020 23:13 #157108
by PCW
The 7C80 has a built-in isolated analog spindle control circuit
so no external interface hardware is needed, but if you require
a PWM output, a step/dir output or expansion connector
output could be used with the right firmware. In addition
if you dont need very fast response, you can use one of
the isolated outputs as a slow PWM source
(PWM limited to servo thread update rate )
so no external interface hardware is needed, but if you require
a PWM output, a step/dir output or expansion connector
output could be used with the right firmware. In addition
if you dont need very fast response, you can use one of
the isolated outputs as a slow PWM source
(PWM limited to servo thread update rate )
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12 Feb 2020 02:55 #157110
by alkabal
For right firmware, i need to customize myself ? (source code available ?)
I ask this because i have also a mini lathe with machinekit and for this one i haven't enough free wire for dedicated spindle circuit like this board (really something like impossible to add new wire in a cleaner way for this lathe spindle)
But this is really a great include !!! i plan to use this built-in control for mini mill
The question is mostly because i think about sharing control panel for both machine (hobby use)
Thanks a lot for reply
I ask this because i have also a mini lathe with machinekit and for this one i haven't enough free wire for dedicated spindle circuit like this board (really something like impossible to add new wire in a cleaner way for this lathe spindle)
But this is really a great include !!! i plan to use this built-in control for mini mill
The question is mostly because i think about sharing control panel for both machine (hobby use)
Thanks a lot for reply
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12 Feb 2020 16:46 - 12 Feb 2020 16:47 #157192
by PCW
For a spindle its usually better to use an isolated interface circuit and they tend to generat a lot of EMI. As I mentioned, you can use one of the 7C80s isolated outputs and a RC filter
to generate and variable analog voltage
I also will be adding some 7C80 firmware options to support common parallel port BOBs
(like the ubiquitous "5 AXIS MACH" BOB) The "5 AXIS MACH" BOB has a analog spindle output
to generate and variable analog voltage
I also will be adding some 7C80 firmware options to support common parallel port BOBs
(like the ubiquitous "5 AXIS MACH" BOB) The "5 AXIS MACH" BOB has a analog spindle output
Last edit: 12 Feb 2020 16:47 by PCW.
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15 Feb 2020 01:16 - 15 Feb 2020 01:17 #157394
by PCW
Last edit: 15 Feb 2020 01:17 by PCW.
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15 Feb 2020 21:11 #157488
by alkabal
Hi
I'm sorry but i'm new with mesa board so i need confirmation.
7c801p_5abobd.bit this one allow to use the onboard step/dir output 5 for allow to use PWM out from this pin.
This firmware is compatible with 5 axis mach bob but as an option and can be used without this bob if the additional pin is not used by config ?
Thanks for your work :
I'm sorry but i'm new with mesa board so i need confirmation.
7c801p_5abobd.bit this one allow to use the onboard step/dir output 5 for allow to use PWM out from this pin.
This firmware is compatible with 5 axis mach bob but as an option and can be used without this bob if the additional pin is not used by config ?
Thanks for your work :
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