Acorn control board and MPG ordered yesterday, so getting ready to start retrofitting.

I managed to get a quote from DMM. Great company, quick response.

They have a Nema 42 replacement motor (fairly new, released a few weeks ago). My motors (According to them) are Nema 42.

The ones they are proposing are same shaft size which is very helpful (5/8th inch) as I am struggling to find direct replacement pulleys with 12 and 13 teeth respectively (14 is minimum generally).

The issue is the motors are not a perfect fit (mounting holes are a bit different - 75 PCD vs 82 PCD, probably minimal effort to sort this but they are fairly pricy and potential import tax from Canada. These are 1.3 KW servos, running off 220V (so high volt feed). Including 3 meter encoder and motor cables plus the Acorn DB 25 cable and programming lead, these work out at around £500 ish per axes.

I know the stuff from BST Automation and other sources listed are cheaper. Id like to have as little mechanical fuss / changes to make this all work (most seem to have 19mm pulleys), so modifications will be necessary but it looks like exact like for like change, so mods will have to be done anyways.

Thoughts?