@idir I've got an old BigRep 1.2 as well and wondering if I could ask you for some info as the local distributors/resellers are proving most unhelpful.

@dc42 Found some pics of the X and Y axis steppers - looks like they are both NEMA 24 sized (https://en.nanotec.com/products/560-st6018l3008-b)

@dc42 I'll be able to take pics tomorrow of the steppers but I do remember the label of the NEMA 34 stating that its 4.95V and 4.56A - seems kind of low for voltage but it is just the Z-axis stepper so its not running all the time

@dc42 Many thanks for the reply.

I had forgotten to take pics of the other steppers but the largest one is the Z-axis one (https://en.nanotec.com/products/571-st8918m4508-a#technical-specifications)

Will take pics of the other two tomorrow but they are considerably smaller NanoTec units as well.

Seems like the NEMA 34 just slides under the 4.55A RMS that the board can push out

Hi All,

I've been searching the web high and low and it doesn't seem like anyone has done this yet but I recently had the chance to acquire a BigRep minus the entire control panel, boards etc. It's pretty much just the stepper motors/frame.

The upside is that it is in near-perfect condition with less than 20 hours on the machine. I've been looking through the wiring diagrams/schematics but now with no control panel, stepper drivers or boards I think I will try the following:

1. Try to buy the original stepper drivers from BigRep here in Singapore (highly unlikely)
2. Find an alternative stepper driver
3. Buy the Duet 3 6HC to control everything else.

The good thing is that I'm trying to convert this BigRep into a concrete printer so I don't need any thermocouples/sensors on the "hotend" side and don't need a heated bed either. Just need the XYZ steppers to work and a way to control the concrete nozzle which seems like can be easily done through the 6HC.

My question is - is the 6HC a good choice and does anyone have any suggestions on stepper drivers?

Regards,

Wouter