I have recently completed the build of my first MPCNC (an all together fantastic experience - recommended to all!), and having been very happy that I had got the thing running (Printed Crown GCODE without a hitch), Dual endstops working correctly, etc. I was attempting to get into a bed leveling exercise when all of a sudden my board made a “Pop” sound, the speaker let out a warble (first time I had heard it make any sound), and the display screen lost all sync.
I pulled the power at this point.
This is a V1 supplied Rambo 1.4 board - bought 12 April (arrived some weeks later), so not used for more than about 3 hours in total so far).
Only possible hint of any issue I had found was that homing on X or Y seemed to time out if distance to travel home was too far (other side of bed, don’t know if there is a limit or timer applied here that causes the thing to reset or lockup requesting reset of board??).
On investigating after the incident:
- I can find no issues with my 12v30A power supply (12.18v measured on all three outputs)
- None of the fuses on the board have blown
- I can see no visual damage to the board (no obvious surface component failures, etc.) - but something very definitely blew on the board…
The board now fails to complete a boot, with a blank display, and now shows a number of red lights on the board…
Was using a needle cutter (pictured) but powered from the PSU directly, not via an output on the Rambo Board.
All cables are insulated and stepper wires are all in drag chains (protected), only non fixed or enclosed wires were those of the needle cutter, and these were also not shorted, etc. as I was hand feeding these at the time (don’t have a wiring solution for this part at the moment!).
Rambo 1.4 (V1 supplied with 12864 display) with Steppers online 82oz NEMA 17 steppers (all still working fine - tested in different environment), Latest Marlin 2.0 software (dualendstops variant), SD Card used to load gcode files (Flite test plans converted suing EstlCam 11 software and Inkscape). Can supply videos of this all working fine, but too large to post here.
Where do I go from here???
What is the warranty arrangement on the Rambo board please?