Been an interesting few days. I mentioned in another post that my printer has started doing a weirdness: every 2nd print, or nearly every 2nd one, instead of actually printing, it just sits at the home position and spits out filament as fast as it can, so fast the extruder chatters. If I power cycle the printer, or cause the controller to reset by unplugging the USB cable then plugging it back, the next print will virtually always work. Obviously though, it does mean something is off, but what?
Today I got to tracking it down. There were several candidates: [LIST=1]
However, with the new computer, a new problem occurred: the printing would pause, for no known reason, for 3 or 4 seconds, then pick up again.
In any case, it was clear that the Surface Pro is not the source of the problems. And, since it was a fresh install of Cura, with fresh profiles from CHEP, it wasn’t Cura either.
Pehaps it printing over USB that’s the problem. Nope: reverting back to micro SD card has the same problem.
So, I think that pretty much nails it: it’s the control board.
I’m also wondering if this issue is responsible for some of the ugly prints I’ve been getting yesterday & today:
The first 2 photos are the edge that was closest to the front of the printer. The 3rd photo is of the item opened up (it’s a wiring bracket for network cabling). Notice, in the 3rd photo, all the zits/bumps/blobs. I tried playing with the retraction. Turning it completely off was the best (the 3rd photo).
Bottom line: I think I’m going to have to get a new control board. Obviously I want a 32-bit board, but which one. I know DrVAX likes the TH3D EZ Lite, and it isa robust board; the only 1 I know of that doesn’t have heat sinks on the TMC2208 drivers, because it doesn’t need them, the board is desgned that well.
OTOH, as far as I can determine, it doesn’t support multiple extruders, something I would like to keep as an option for the future.
Do I go for something like a Duet, which costs more, but does support multiple extruders?
I see on Amazon that BTT 1.3 & 1.4 boards do support multiple extruders, but are they good?
I’m looking for suggestions…