I hope this is the correct forum for my problem. Please point me in the right direction if not.
Hello AnyCubic RAMPS/TMC 2208 users,
I'm running my original RAMPS board (Motherboard 33) in my AnyCubic Delta Plus using TMC2208s in Standalone mode @1.2V on the Vref pins. Anything lower and the motors lose steps and go out of calibration. Their temperatures are only 42 deg. C with good fan blast to keep them happy.
I just don't understand how this seemingly-random loss of steps can develop out of the blue.
The upload seems to be okay and the printer works reasonably well when making relatively small calibration blocks, 40 x 40 mm or so and is consistent at this size. Trying to print towards the edge of the 240mm dia glass plate brings on these problems. The item I'm trying to print is only about 160L x 100W x 40H so it should be okay.
Has anyone had similar problems?
I might try to replace the 2208s with the original DRV 8825s but this would defeat the purpose of the upgrade.
The 2208s are really quiet and run the steppers very smoothly when they work at all.
I have looked in various forum pages but so far there's nothing relevant to my problem.
All suggestions will be very welcome.