laser cutter/engraver rebuild build log

[gavztheouch]

One turn of the linear actuator shaft moves the carriage roughly 70mm

There is a reduction of 3:1 on the motor so one spin of the motor will move the carriage 70/3 = 23.33 mm

The advertised top speed for the units is 1.5 m/s to achieve this the motor will have to spin at what rpm?

Change 1.5m/s to mm/min = 90,000mm/min

90,000/23.33 = 3857.69 rpm

I have been looking at the leadshine closed loop stepper units. In particular the nema 23 2nm unit. They advertise the ability to run at 3,000rpm but the torque seen at these high rpms is very low just like most steppers in fact the torque curve stops at 2000rpm?. I guess this is why the high end laser cutters use small servo motors. Leadshine also make a nema 23 frame servo which is almost the same price as their closed loop steppers, for some reason I haven't seen a sole use them on any project. The same could be said for the steppers.