Quote Originally Posted by clutchslip View Post
Newbie here, looking at hardware choices for the X and Z for my Boxford 240TCL update.

Browsing the variety of Chinese stepper motors on eBay. I've noticed that the prices on what they call 'hybrid closed loop stepper motors' - i.e. a package of stepper motor with encoder and control box - is now around the same price per unit as what I would pay for similar open loop models without the encoder which are not trying to ape a servo system. Equivalent NEMA 34 size units are around 30mm longer, accounting for the encoder.

Does anyone out there have any experience of fitting and using these (usually 2 phase) in preference to open loop equivalents? Bearing in mind the equivalent price, is this a worthwhile choice?

Many thanks in advance.
I’ve been using a Norma 34 close loop stepper on the Z axis on my boxford bud cnc conversion lathe. It’s been up and running 2 years and works perfectly. Very accurate and I have never noticed it loosing any steps
The nema34 is direct drive through a 5mm pitch lead screw
Would it have performed the same without the close loop, I’ve no idea

Paul


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