So I upgraded the firmware, which I learned is not absolutely always necessary but you live, you learn. I thought maybe it would help some of the issues I’ve been encountering :). That being said, after calibration, I went to run a test disc print, and as the bed made its way downward, I heard somewhat of a grinding noise and then the error ‘Abnormal resistance please try again’ (paraphrased - sorry I didn’t write it down like an idiot). I checked the console log and noticed a ton of “Photoelectric switch not triggered” in there. Could that maybe have something to do with it?
Possibly. As far as I know, there are two “photo-electric” switches on the bottom of the printer, which detect when the build plate reaches the very bottom. Sounds like some kind of an issue with those. I’d suggest resetting to defaults after a firmware update - this will make it just like it came out of the box, and will do all the calibrations again, which will likely fix any issue it’s currently having.
Note, you can downgrade firmware… simply get the firmware file onto a flash drive, but rename it to a version newer than what is in the printer, and stick it in - should see it automatically.
After power off and you bed is on the bottom. It wil go home. By going up a little and back down you get that message in the console. Then the bed go up to the nozzle and then its going back down and need to trigger them. There can also be some plastic in one of the holes.
Thanks a lot :). I actually checked those holes and threads and will continue to keep an eye on them. I need to find me a powerful mini vacuum for cleaning around the bottom of this machine.
I think if you gently set the machine on its side, you can see the bottom and the little switches. The actual switch itself should look something like this: https://n11scdn.akamaized.net/a1/1024/elektronik/diger/tcst2103-optical-interrupt-switch__0632358607005264.jpg It’s an infrared emitter, a gap, and a detector. Two little prongs on the bottom of the bed fit into these gaps - that’s how the printer knows a) that the build plate is down there, and b) after power-on, it moves the bed up and down a few times here to synchronize the Z motors, before sending the bed upwards.
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