Hi,
I am trying to help out a mate who bought a chinese flsun "metal frame 3d printer". First some background info on the setup:
[
www.aliexpress.com]
It is apparently delivered totally virgin state with no firmware and an SD card with Arduino, Marlin and windoze drivers and Repetier host software for Win.
There is a problem with the driver for windoze which after much time wasted going round in circles I am not even going bother with. I decided to install Aruino IDE on LInux laptop. Linux recognised the USB device straight away and the Marlin provided on the SD compiles and flashed without issues.
I had to change baudrate to 115200 in configure.h since Linux did not seem able to set the fastest speed ( this may be a driver limitation, I'm not interested in chasing that down).
Having set the baudrate the Arduino monitor shows the output from the board perfectly. That much went beautifully on Linux.
The problem is that the firmware shows an error and shuts down immediately. I'm not on site but from memory it was essentially this:
Quote
Marlin
MAXTEMP reached : temperature head_ID: 0 immediate shutdown.
If I reset the board, it just prints the same preamble and ends with this msg again.
ID 0 seems to relate to the extruder head. I have checked both thermistors with a DVM and they are neg coeff 100k range components and seem to be in good order measured at the socket which plugs into the mainboard. Actual resistance at room temp was about 112 kohm and reduced with heat from finger.
Max temp error would indicate a low resistance or short circuit. So I'm considering a possible fault on the board, though the resistance at the pins ( with thermistor disconnected ) is not zero, so not a short.
QUESITONS:
1. Should I expect the configure.h provided with the machine work? It seems like a silly question when buying a product but you never know with the chinese.
2. Does anyone have a known working config for this printer?
3. Does this error indicate a board failure ( manufacturing fault ) ?
4. What is the correct thermistor parameter and board ID for this board in Marlin ?
5. Does anyone know what the controller is? It identifies as a Mega 2560 but has what looks like Pulolo drivers plugged in and is not a straight clone. Is it a clone of something like Prusa board? The manufacturer gives very little technical info about what they are providing. I don't get the impression they went as far as actually
designing a product !
Thanks for any knowledge from those who know this machine.
Edited 9 time(s). Last edit at 10/18/2017 07:37AM by wrapperz.