Unexpected printing stop (Page 2 of 2)

I'm using a Mac 10.85 with the sd4 and was having the same problems. It would print for about 5 min. and then stop, I could get it to continue by repeatably using the "fake ok"but that got old in a hurry. I noticed the X axis motor was extremely hot so I fabricated a fan mount with shroud to cool the motor with it's own power supply and it printed fine and has not stopped since. I printed up a nice mount with shroud now and it works great. What is the proper baud rate for the mac? The initial setup says to use 250,000 the mac setup says to use 115,200 and I have seen other's using something else. I don't know what baud rate means or does so if someone could help it would be great.

Got same problem,

Sounds like any electric arc 2 meters around the printer cause the printer to stop, tried with two diff laptop and the problem still here, even if i use cable with ferrite

Just to tell that is useless to buy an UPS i tried it and the problem is the same, on battery too

It could be bigger but you must consider the additional mass that would then become an additional load for the Y-motor.  It's really a compromise of weight, torque and speed.

I agree 100%  the first mod I ever did to my printer was to add a heat sink to that motor.  I often think I should add a fan but the heat sink that I pulled off an old PC processor has just worked so well.  I will say that a little extra mass can really screw up the ability to print at faster speeds.  I certainly can tell the difference of the Bulldog XL's extra mass vs. the original extruder.

No but once I enclosed the printer I had some skipping and it fixed that.  I haven't really followed your thread but my guess would be a loose connection even though you have checked all of that stuff.  Those connectors are not the best and were a constant source of frustration for me.  Go find an old PC and steal a heat sink that is about the right size.  What do you have to loose?

The red and blue ones for the heat cartridge and thermistor.  I did replace them all... of course not much of my printer is original at this point.  I do feel that it is important to have everything working properly before I will do a modification.  This way when something doesn't work I can only blame myself

The USB connection can be suspect, which was what my cause was.  I was using the supplied cable from Solidoodle, but I had it plugged into the front USB.  I switched it to one on the back directly on the motherboard and I haven't had trouble since.

I'm glad you were able to fix your issue as well!

I have the same issue with stopping mid print occasionally. It wouldn't be so bad if when it happened it turned the extruder heater off, but it doesn't. The nozzle just sits there, presumably cooking ABS.

I can't trace the stoppages back to anything in particular.. Ie lights, stove, etc. it just seems random. Solidoodle support has advised me to return my power supply for exchange, but I'd really be surprised if that fixed the problem.

Really?  I would have thought there'd be other indications, like not being able to heat things to temperature or whatnot. I don't even need to power cycle to get things working again, I just have to disconnect and close RH, unplug he USB cable from the computer, plug it back in, fire up RH, and everything works again.