I’ve been using the 269oz motors/steppers…which have been plenty good for what i’ve been doing. But recently i upgraded to a CNC/VFD spindle and cutting aluminum i’ve seen some skips on aggressive cut settings.
I’m rebuilding my xcarve with an openbuilds/acme threaded rod style drive (instead of 9mm belts) and found these motors which are exactly 4.0A/2.4NM which is the max the Xcontroller can drive. The 269’s required 3.0A and i ran them a little hotter than that. These “339.79oz” motors are $25 a pop. so cheaper than 269s as well. Could be complete rubbish, but the specs look good. If anyone has experience with these let me know … otherwise I’ll let ya’ll know how they compare to the 269s in a week or so
Just an FYI you will experience resistance within the wires, so calculating for this and overdriving the output to overcome this resistance drop is a great method of achieving power. So when you do the resistance calculation and toss that into ohms law, then you probably were still within tolerance of the 3A motors.
For those 4 amp ones you would also benefit from swapping the wires out for a larger gauge which in turn reduces the resistance and allows you to get more power at the motor. Also, trimming the wires to the shortest possible length will help reduce resistance too
Sounds like you’ve got a solid plan with the screw drive and larger steppers… How much more is a ball screw setup though? That will remove the backlash issue experienced with acme lead screws
The fasteners(screws, M4/M5 have been the biggest expense), got a couple a 6061 sheets for 120 bucks. So probably 300-500 bucks to convert over depending on size. Upgrading the steppers not included (they’re 130 for 4 + couplers).
My CNC spindle is way too heavy, so i’m getting alot of play in the Y-axis direction(front-back). So looking forward to the added stiffness.