PWM connection

Bertus Kruger
Site Admin
Posts: 1521
Joined: Wed Feb 03, 2016 10:26 pm
Location: Wellington , New Zealand
Contact:

Re: PWM connection

Post by Bertus Kruger » Sun May 26, 2019 7:34 pm

erniehatt wrote:
Fri May 17, 2019 7:50 am
Update2.
Come to think about it, it's probably just jumper across from the X to the Z
Have a few minor things to do, then I will upload a pic of it.
;)

erniehatt
Posts: 268
Joined: Thu Nov 03, 2016 8:16 am

Re: PWM connection

Post by erniehatt » Mon May 27, 2019 3:45 am

Thanks Bertus,
It seems to be the z axis side that is not working, so I tried a new driver, still not go, so I have ordered a new Hat, only hope it is that and not the PI itself.

Bertus Kruger
Site Admin
Posts: 1521
Joined: Wed Feb 03, 2016 10:26 pm
Location: Wellington , New Zealand
Contact:

Re: PWM connection

Post by Bertus Kruger » Thu May 30, 2019 7:34 pm

erniehatt wrote:
Mon May 27, 2019 3:45 am
Thanks Bertus,
It seems to be the z axis side that is not working, so I tried a new driver, still not go, so I have ordered a new Hat, only hope it is that and not the PI itself.
The Pi should be okay. Its only connected with the serial pins and if the Pi and the board can communicate it is still working.

erniehatt
Posts: 268
Joined: Thu Nov 03, 2016 8:16 am

Re: PWM connection

Post by erniehatt » Sat Jun 01, 2019 7:41 am

That's a relief Bertus.
Then it can only be the hat that is damaged, as I did try a new Driver.
Cheers

crayok
Posts: 1
Joined: Thu Oct 10, 2019 4:33 pm

Re: PWM connection

Post by crayok » Thu Oct 10, 2019 4:43 pm

I know the original request for information was a while ago but here is my solution for a recent build using the hat. It works for 0 to 100%. First transistor does the 0 to 10 V conversion but is inverted the second transistor does the second inversion to make it right. The transistors are not critical just use a general purpose one reasonable gain. R2 should have a lower value if the PWM circuit in the spindle controller is low impedance (down to 3.3K or so). Similar circuit could be done with dual optoisolators to keep grounds isolated. I had to re-solder the spindle controller input connectors and I took a closer look at the board and I am suspicious of the quality and safety of these things...

David
PWM-converter.png
PWM-converter.png (87 KiB) Viewed 113 times

erniehatt
Posts: 268
Joined: Thu Nov 03, 2016 8:16 am

Re: PWM connection

Post by erniehatt » Thu Oct 24, 2019 10:21 pm

David better late than never I'd say, thanks very much for the circuit, I will give it a try. Thanks again Ernie :)

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests