Can Mesa card 7i76e and Linuxcnc output a PWM signal
- raychar
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30 Nov 2021 10:08 #227989
by raychar
Can Mesa card 7i76e and Linuxcnc output a PWM signal was created by raychar
Wanting an I/O pin can output a PWM voltage, so that it varies from; let says 0~12V? Can it be put (set) in a program to get it changes at any time or gradually changes within a certain time period?
What i really want this is similar what i did in an arduino program, the output PWM magnitude can be varied by setting a parameter within a range of 0~255, so i can use it to dim a lamp or change a DC motor speed through by using a Mosfet electronic component. (thinking that it actually achieve this by changing its duty cycle percentage that it is behind the program).
Thanks,
What i really want this is similar what i did in an arduino program, the output PWM magnitude can be varied by setting a parameter within a range of 0~255, so i can use it to dim a lamp or change a DC motor speed through by using a Mosfet electronic component. (thinking that it actually achieve this by changing its duty cycle percentage that it is behind the program).
Thanks,
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- tommylight
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30 Nov 2021 11:25 #227993
by tommylight
Replied by tommylight on topic Can Mesa card 7i76e and Linuxcnc output a PWM signal
7i76E has a dedicated PWM output in the form of an isolated potentiomenter for use with VFD spindle control.
It can also be reflashed with firmware that will put a PWM channel on the last of the step/dir headers, so it looses a stepgen.
It also has one or two 26 pin headers with 5V tolerant pins that can also be used for PWM (or encoder or stepgen), very sensitive so care must be taken during wiring and testing.
Pretty sure the normal high voltage outputs can be used as software PWM for very slow rates.
Reading the manual would explain a lot of options.
It can also be reflashed with firmware that will put a PWM channel on the last of the step/dir headers, so it looses a stepgen.
It also has one or two 26 pin headers with 5V tolerant pins that can also be used for PWM (or encoder or stepgen), very sensitive so care must be taken during wiring and testing.
Pretty sure the normal high voltage outputs can be used as software PWM for very slow rates.
Reading the manual would explain a lot of options.
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