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Re: Chinese eBay 3D printer - Story so far, and request for advice - 8 years ago

I had a lot of weird problems with mine - but only when running from the SD card. At times it would seem like either the X or Y axis would home themselves before continuing with the print, and sometimes the extruder would reverse all the filament out of it. Since then I have added a raspberry pi as a USB controller running octoprint - and I've had no problems. I wonder if either the 5V regulator

by furbrain - Prusa i3 and variants

Re: OK, so how bad is this printer exactly? - 8 years ago

Oh, and 80 degrees for the bed seems to give good adherence. Phil

by furbrain - Prusa i3 and variants

Re: OK, so how bad is this printer exactly? - 8 years ago

I've found setting temperatures of about 220degs in my slicer for PLA seems to work reasonably well - but you may need to experiment a bit to find the best temps to print at.

by furbrain - Prusa i3 and variants

Re: Printer behaving erratically during print from SD - 8 years ago

Thanks all for your suggestions. I don't think it's a cross-talk issue with the stepper motor and thermistor as the thermistor readings are nice and stable. I don't think it's a minimum layer issue as it is really random. I've started running the machine directly from a raspberry pi using octoprint - and this seems to have eliminated all of the problems I was having, so it seems to be an SD card

by furbrain - Firmware - Marlin

Re: OK, so how bad is this printer exactly? - 8 years ago

Further experiments - increasing the current to the extruder stepper motor deals with some of the skipping problems and allows faster print speeds. The problems I've had with stopping and filament ejection seem to have gone away now that I am using octoprint and a raspberry pi - so possibly a problem with the SD card/reader.

by furbrain - Prusa i3 and variants

Re: OK, so how bad is this printer exactly? - 8 years ago

One more thing - there is a nice socket to plug in a kettle-style power lead. Unfortunately this has exposed contacts on the rear as I found out as I tried to plug a lead into it. Shocking experience... Now fixed with a bit of gaffer tape to avoid any more 240V surprises

by furbrain - Prusa i3 and variants

Re: OK, so how bad is this printer exactly? - 8 years ago

I've just got one of these. I've found a few issues: - the thermistors for the extruder and bed are 50k (not 100k) and so read about 20 degrees hotter than they really are. You may need to adjust the temperature in order to get things to print properly. If you see temps of 38-35 degrees at room temperature, you may have this problem. I'll swap these out for proper thermistors when I get a chanc

by furbrain - Prusa i3 and variants

Printer behaving erratically during print from SD - 8 years ago

I'm using a CTC printer that I've just built. It mostly runs fine, but every so often will pause in the middle of a print, and home the X or Y-axis (occasionally both together), and then return to the object and start printing. This is mildly annoying and sometimes leaves a bit of string hanging off the edge of the object, but I can cope with that. More rarely, halfway through a print (usually

by furbrain - Firmware - Marlin