Duet3D mini5+ - wiring for Bondtech LGX Lite?

CHarding

Hi!

I'm trying to figure out how to wire the four cables from the LGX Lite stepper motor (Yellow, Red, Blue, Green) to the four pins on the mini 5+ board (Red=B-, Blue=B+, Green=A- and Black=A+). Would anybody who has done this be willing to share which goes where?

Thanks!

LGX Lite wiring:

Duet3D wiring:

droftarts

@CHarding You need to identify the stepper motor phases, so you know which pair of wires is for each phase. In the 'READ THIS FIRST' section here https://www.bondtech.se/product/lgx-large-gears-extruder/ there's a link to How to identify the coils on a Creality/Bondtech stepper motor. Or look at the Duet3D documentation here: https://docs.duet3d.com/User_manual/Connecting_hardware/Motors_connecting

Ian

deckingman

@CHarding The link that @droftarts has posted is for the LGX with a 6 pin connector - the LGX Lite uses a different motor with 4 hard wired leads. But if you look at Bondtech's web site for the LGX Lite, you'll come across a link to the LDO motor they use - here it is https://www.bondtech.se/downloads/TDS/HT-LDO-36STH20-1004AHG(XH)-RevA.pdf

As @droftarts has said, it's always wise to check but that pdf shows one coil is Red and Green the other is Yellow and Blue.

CHarding

@ droftarts @deckingman Thank you for your input.

The main issue was that the cabling on my version of the LDO motor (which I bought in late 2022) is "unusual". On my YRBG (Yellow, Red, Blue, Green) cabeling, YR should be one pair and BG the other.

(Note that the colors of my LDO, do NOT match the colors used on the RevA spec sheet: https://www.bondtech.se/downloads/TDS/HT-LDO-36STH20-1004AHG(XH)-RevA.pdf !)

However, after using the short-out-a-pair method for establishing the pairs from here: https://docs.duet3d.com/User_manual/Connecting_hardware/Motors_connecting it turns out that the two pairs in fact are GR and YB! The following mapping of the cables to the A+/A- B+/B- notation the Duet board uses seems to work:

A+ => Green
A- => Red
B+ => Yellow
B- => Blue

(Note: there maybe other valid mappings, this is just the first one I tried and it works for me)

Cheers

Chris