Moving servo shuts down octopus 1.1 board
Hi.
I have been running this for more than six months:
RPi 3a+ powered from GPIO and servo for klicky probe connected via BTouch probe connectors.
Today I upgraded to rpi 4b and I now power it directly from PSU through stepdown.
The result of this change is that everything works but as soon as the printer is expected to move 996R servo the board shuts down. This doesn't happen every time - about 1 in 2 to 5 times.
Any ideas what could have gone wrong? I've been using this servo for about half a year with no problems so far...
4 Replies
Also I tried powering RPi from the wall directly, did not help
RESOLVED: I now power the 996R servo from the 24V->5V stepdown as well. It seems to have solved the issue.
Theory is that the 2,5A peak servo overloaded the 5V branch in Octopus.
The explanation why I could power both the servo and the RPi directly from Octopus before is simple:
A pi 4 consumes more power than a pi 3. Out of my head rpi3:2A, a rpi4:2.5A. I don't know what the 5V peak of the btt is. So you ran on the limit 😀
Rpi4 was never powered from octopus...
But yes. The magic aspect of it is that it shouldn't have been possible to power even the rpi3 + servo before but it worked