Error while flashing firmware?
I have a MK2.5S printer I am attempting to install the MMU2S upgrade for. I have finished all the wiring, and now while attempting to flash the firmware for the RAMBo13a board, receive the following error:
avrdude-slic3r: Version 6.3-20160220-prusa3d, compiled on Sep 4 2019 at 15:21:18
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
Using Port : /dev/ttyACM0
Using Programmer : wiring
Overriding Baud Rate : 115200
avrdude-slic3r: stk500v2_recv(): timeout
avrdude-slic3r: stk500v2_getsync(): timeout communicating with programmer
avrdude-slic3r: Could not open port: /dev/ttyACM0
avrdude-slic3r done. Thank you.
The printer itself is also no longer working. When turned, the print bed starts to heat up and the fan starts spinning. The LCD screen displays two rows of bars. Pressing the reset button on the RAMBo causes the RAMBo LED to flash, but has no other change. Attempting the reset procedure described here caused the squares to flash and the printer to beep, but there was no other change. I suspect that I have a firmware issue, but am unable to flash to a newer firmware due to the timeout issue. I have attempting flashing on both a windows and linux computer. How do I fix this issue?
RE: Error while flashing firmware?
IIRC I had a similar issue on mine. I think it was that I had one of the PSU and heat bed cables swapped. They use the same style of connector plug. Have you double-checked that your power connectors are in the right spot per the assembly instructions? Check steps 28 and 29 at the below site.
https://manual.prusa3d.com/Guide/6.+Electronics+and+MMU2S+unit+assembly/1041#s18232