Controlling mains 0-9v sherline lathe spindle mesa 7i96s
- ffffrf
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08 Jul 2024 16:00 #304671
by ffffrf
Controlling mains 0-9v sherline lathe spindle mesa 7i96s was created by ffffrf
Hello,
I am trying to control my sherline lathe spindle. It uses a potentiometer that is wired to mains. I have been looking at older threads for people who have done this but I am still a little unclear on the best approach.
It seems mesa 7i96s has a 5-20v isolated analog output - but I would need to convert thisto 0-9v to driver the sherline - what is the easiest way to go about this? I have read that people opted to use a firmware that gives the mesa an extra pwm on stepgen4 and do a pwm to analog conversion board such as spinx1A - but even with the spinx, how do you get its range of 5v - 21 to convert to linear 0-9v? Could you use something like a dc-dc buck converter (xl4015 or LM2596S)? Want to make sure I am doing things as safely as possible.
I am trying to control my sherline lathe spindle. It uses a potentiometer that is wired to mains. I have been looking at older threads for people who have done this but I am still a little unclear on the best approach.
It seems mesa 7i96s has a 5-20v isolated analog output - but I would need to convert thisto 0-9v to driver the sherline - what is the easiest way to go about this? I have read that people opted to use a firmware that gives the mesa an extra pwm on stepgen4 and do a pwm to analog conversion board such as spinx1A - but even with the spinx, how do you get its range of 5v - 21 to convert to linear 0-9v? Could you use something like a dc-dc buck converter (xl4015 or LM2596S)? Want to make sure I am doing things as safely as possible.
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- PCW
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08 Jul 2024 16:06 - 08 Jul 2024 16:10 #304675
by PCW
Replied by PCW on topic Controlling mains 0-9v sherline lathe spindle mesa 7i96s
The 7I96S analog output is a potentiometer replacement.
if you supply 9VDC to SPINDLE+ and SPINDLE- the output
will vary between 0 and +9VDC for PWM values of 0 to 100%.
It is expected that the potentiometer connections on the drive
supply this 9VDC.
if you supply 9VDC to SPINDLE+ and SPINDLE- the output
will vary between 0 and +9VDC for PWM values of 0 to 100%.
It is expected that the potentiometer connections on the drive
supply this 9VDC.
Last edit: 08 Jul 2024 16:10 by PCW.
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08 Jul 2024 19:32 - 08 Jul 2024 19:35 #304689
by ffffrf
Replied by ffffrf on topic Controlling mains 0-9v sherline lathe spindle mesa 7i96s
But the 7i96s manual says that spindle + has to be between 5-20v and spindle- has to be between 5-20V - so how do you get a range of 0-9v from that? Unless the manual means that the difference has to be between 5 - 20v?
Or can you connect spindle+ to 9v and spindle- to negative 9 voltsand use 50% of the PWM range?
Or can you connect spindle+ to 9v and spindle- to negative 9 voltsand use 50% of the PWM range?
Last edit: 08 Jul 2024 19:35 by ffffrf.
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