Mesa 7i95
22 Jan 2020 02:55 #155387
by sdwyer
So you're saying I can generate PWM in hardware on one of the SSR outputs?
That would work for now, and I'd add a breakout board on P1 for more outputs as you suggest.
I'm using a Homan Designs Digispeed DC03 GX V3 board for isolation between the Mesa and my spindle controller. Isolation is needed because inputs in the VFD float near mains potential. Its a Sieg brushless motor and controller that came on my mill.
www.homanndesigns.com/index.php?main_pag...ncj79miq92t8amiklfe0
I'd be happy taking some GPIO from elsewhere to drive the DC03 board, and saving the SSRs for switching heavier loads via relays.
Cheers!
Shaun
That would work for now, and I'd add a breakout board on P1 for more outputs as you suggest.
I'm using a Homan Designs Digispeed DC03 GX V3 board for isolation between the Mesa and my spindle controller. Isolation is needed because inputs in the VFD float near mains potential. Its a Sieg brushless motor and controller that came on my mill.
www.homanndesigns.com/index.php?main_pag...ncj79miq92t8amiklfe0
I'd be happy taking some GPIO from elsewhere to drive the DC03 board, and saving the SSRs for switching heavier loads via relays.
Cheers!
Shaun
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22 Jan 2020 03:05 #155390
by PCW
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22 Jan 2020 05:14 #155398
by cmorley
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22 Jan 2020 06:11 #155401
by sdwyer
Hi Peter,
To be clear, you're suggesting a software based PWM instead of a hardware based 'pwmgen' ? or am I missing something about setting modes on the GPIO pins on P1.
I'd prefer to use a hardware pwmgen if thats possible.
Cheers!
Shaun
You could use the parallel expansion port for driving that interface
Just make sure you have common grounds before you connect signals
To be clear, you're suggesting a software based PWM instead of a hardware based 'pwmgen' ? or am I missing something about setting modes on the GPIO pins on P1.
I'd prefer to use a hardware pwmgen if thats possible.
Cheers!
Shaun
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22 Jan 2020 17:15 #155436
by PCW
7I95 config with PWM on pin 1 of expansion connector
7I95 config with PWM on pin 1 of expansion connector
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