4 ms·
Will you be adding servo support in the future? Steppers are great, but anything big needs a servo, as the steppers get to expensive and too slow very quickly.
by Hasz 8y ago
Will you be adding servo support in the future?
Steppers are great, but anything big needs a servo, as the steppers get to expensive and too slow very quickly.
- jcoffland 8y agoNo servo support yet but we can drive NEMA 23s and 34s at up to 4k RPM. Edit: We are adding step and direction outputs which could be used to control an external servo driver. You can actual access these outputs now of you are alright with soldering some headers on to the main board. In the future, we do plan to make a servo version of the Buildbotics CNC controller.
- semi-extrinsic 8y agoFYI there are hybrid steppers now, which helps with some of the traditional stepper drawbacks. See e.g. https://youtu.be/NARodU-vVWs https://youtu.be/NARodU-vVWs
- dekhn 8y agocan you point to some continuous rotation servos that would replace steppers? I haven't been able to find any that are affordable.
- HeyLaughingBoy 8y agoI believe he means servos as "high-speed DC brushless motors with feedback" not the low cost gearmotor servos used in R/C models.
- dekhn 8y agobut those aren't affordable! also you can buy steppers with feedback in NEMA34+ form factor for not too much. I use them in my machines.
- aj7 8y agoIt is about $1000 an axis for 1/2 hp AC servo + amplifier from China. But worth every penny. Some productive work can be done with bigger step motors. But setups with little ones are soon abandoned.
- serialx 8y agoIf you want small servos, just use steppers with drivers like TMC2130. Anything bigger, many people seem to like ClearPath servos. Price to performance seem to be pretty good.