i3 clone died
Hello!
I have a "Makerfront i3pro-XL printer. It's a Prusa i3 clone from 2016. The maker is out of business, and their website now points to Chinese porn. I've always considered the Makerfront to be a pretty good printer; it has a very stiff laser-cut steel chassis. It's also a fairly large printer, with a bed 8 inches by 12 inches.
It has started to fail, reporting that "SD init failed". Which is odd, because it has no SD card! Other than that, it seems to work normally; but with that SD fail, Octoprint won't talk to it :(.
I have obtained the latest Marlin code, and have built it on my PC. But there are a LOT of options. Right now, I'm looking at the thermistors; one for the hot end, the other for the bed. Anybody know which ones Prusa used?
Thanks in advance,
- Jerryk
RE: i3 clone died
have a look in the Prusa Mk1 github... there is source code there, BUT, if your printer uses any motherboard that is not a mini rambo, the chances are that the thermistors will be on different pins anyway!
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: i3 clone died
Thanks Joan!
The motherboard is an Arduino Mega 2560 plugged into a RAMPS 1.4 card, with 5 A4988 Stepsticks. Very ordinary stuff for the time period. I think it's not so much which pin did they use - but rather exactly what thermistor.
RE: i3 clone died
Prusa use Semitec 100K thermistors, but there is no guarantee that the clone people use the same thermistor.
the prusa mk1 used a Bead thermistor for the hot end, trapped in place with a small screw, and a bead thermistor for the bed held in place with aluminised foil and capton tape
all later prusa Mk1, Mk2 and Mk3 printers use a cartridge thermistor for the hot end
Prusa Mk1, Mk2 and Mk3 printers use a bead thermistor for the heatbed,
I am not sure about the Mk4 and XL, as I do not have them
you can test the thermistors with a multimeter, the resistance at 25C should indicate the thermistor type
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK