Strike CNC (My first CNC router)

[Jonathan]

i tested the higher torque version and found that they performed worse than the 3nm version.

Interesting, that's precisely the information I was after here:

http://www.mycncuk.com/forums/showth...ers-or-drivers

Please could you elaborate on what tests you performed?

[Gary]

I ran the SY60STH88 and the SY60STH100 on the same drivers at the same voltage and the larger motor could only get to about 60% of the speed as the 88mm long motor.
I ran them on the Leadshine M542 at 40V and the Leadshine M880 at 70V.
While the longer motor would give more torque at the lower speeds, this soon changed after hitting a few hundred RPM.
Also the specification in the link you posted looks all wrong.
Look at the inductance and the current and compare it to the 88mm long motor.
The Inductance is lower than the 88mm long motor but also the current is lower.
You would expect the inductance to be higher if the current is lower.
I suspect the inductance is actually a lot higher than is shown in the datasheet, and if this is true you need a much higher voltage driver to get a good performance from the motor.
even at 70V, the 88mm long motor performed better.


There is only so much power you can get from a motor with such a small frame, and if you want more power you have no choice but to go to a larger frame motor like a nema 34, but at the same time also use much higher voltage.

Interesting, that's precisely the information I was after here:

http://www.mycncuk.com/forums/showth...ers-or-drivers

Please could you elaborate on what tests you performed?