Control system for Harrison M250 CNC

[AdrianW]

Here's a photo of what's on there now - it's an HP HEDS-5310 - I'm pretty sure this range doesn't go over 512 counts/rev so it's well under the minimum. As you can see space it tight - I'll probably have to make a new bearing assembly to allow anything bigger to fit in. For clarity, the encoder is the smaller black housing up against the gearbox. The larger black cylinder next to the pulley is a bearing housing that's bolted to the mounting bracket.