Topics created by mkelly

I would separate the 48V device completely from the Duet to avoid any damage. If it's a laser, one has to control the current with a separate laser driver anyway to limit the current to avoid damaging the laser. To turn on/off or other control, I would use one of the communication protocols and lines to the Duet. To be sure, an optocoupler can be used.

I successfully drove a TowerPro MG996R, which is a digital servo. I mean, it has a digital internal closed-loop system, and is controlled the same way as analog ones.

Your servo, however, is smarter: it can be programmed through the control pin. It should work as any other servos work, by driving a 50Hz signal on the control pin, and it does with Arduino. There is something in the Duet signal messing up the internal electronic of your servo, but I don't see what.

Using the on-board 5V supply is OK, although if your Duet is pre-1.04 then unless it is a small servo you should connect a 220uF capacitor in parallel with the 5V feed to it. What I didn't like about your diagram was connecting the ground wire of the buck regulator to a controlled fan output.

If the servo jitters then you are probably commanding it further than its usable range. To avoid the problem, either command it to a less extreme position in the M280 command, or follow the M280 command by a G4 command to delay for long enough for the servo to move, followed by a M42 S0 command to stop commanding the servo to move.

Hi All

I'm really bringing this post back from the dead!
Was there any progression on the use of your non-contact sensor through the Duet system? I am wanting to implement something similar for myself.

Thanks