I think I hear a 3-phase AC induction motor hooked to up to a variable frequency drive. I love that singing sound at startup and low speeds. Servo? Is there position feedback on the shaft for speed regulation?
@AnotherGlenn - close, it's a brushless servo with a 2000 line encoder and a servo drive. The drive has encoder pass through so threading/tapping should be no problem.
@AnotherGlenn Yes, both axis and the spindle have Allen Bradley servos and servo drives in this video but I've removed the drives and built a control box with Granite Devices drives for the lathe now. Most of the singing noise is from the X and Z axis servos, which are tuned pretty stiff.
The spindle is actually a live tool from a bigger CNC lathe. I made an adaptor to bolt the servo on the back - it works nicely. The Dunham tool 5C headstock would be a cheaper way to get something more solid, if you didn't have a live tool to pull apart!
It's a good idea to cut a radius on the tool holder to avoid collision into the collect. Also the spindle sounds nice, what kind of spindle motor you used?
do you sell this?
madfastmax 1 year ago
I think I hear a 3-phase AC induction motor hooked to up to a variable frequency drive. I love that singing sound at startup and low speeds. Servo? Is there position feedback on the shaft for speed regulation?
AnotherGlenn 1 year ago
@AnotherGlenn - close, it's a brushless servo with a 2000 line encoder and a servo drive. The drive has encoder pass through so threading/tapping should be no problem.
ZealCNC 1 year ago
@ZealCNC Thanks for your quick reply. So, the motor itself is a brushless DC? The singing says to me, AC motor with VFD. Who makes that servo?
AnotherGlenn 1 year ago
@AnotherGlenn Yes, both axis and the spindle have Allen Bradley servos and servo drives in this video but I've removed the drives and built a control box with Granite Devices drives for the lathe now. Most of the singing noise is from the X and Z axis servos, which are tuned pretty stiff.
ZealCNC 1 year ago
@ZealCNC So, DC drives can sing, too? I guess that makes sense. Thanks for letting me know :)
AnotherGlenn 1 year ago
I'd love to see a bigger versio of this say like 7x10 or 9x20.
gbowne1 1 year ago
@gbowne1 - Me to, ideally in my workshop...
ZealCNC 1 year ago
Hi, I built it for fun - I had the parts, and thought it would be cool to make something with them.
ZealCNC 2 years ago
Hi, Where you buy the spindle unit? Or you build it by yourself?
stanley6602 2 years ago
The spindle is actually a live tool from a bigger CNC lathe. I made an adaptor to bolt the servo on the back - it works nicely. The Dunham tool 5C headstock would be a cheaper way to get something more solid, if you didn't have a live tool to pull apart!
ZealCNC 2 years ago
@stanley6602 You can have C-axis function too! Nice
stanley6602 2 years ago
It's a good idea to cut a radius on the tool holder to avoid collision into the collect. Also the spindle sounds nice, what kind of spindle motor you used?
stanley6602 2 years ago
Hi, the spindle motor is a 500 watt brushless servo, so it could do indexing too!
ZealCNC 2 years ago
That is beautiful! Is it home made, or did you buy it? I want one.
rocketmagnet 2 years ago
@rocketmagnet - I built it :)
ZealCNC 1 year ago