valleycycles
Aluminum
- Joined
- Dec 30, 2008
- Location
- California
I have a beautifully restored 1989 HLVH restored lathe. Reground ways, repainted and each nut screw and washer went over and made like new. I dont use it every day so it may sit and just look pretty for a bit. But when I need it...I need it.
So lately the low speed setting on the motor does not want to start. It seems like it tries to get the chuck spinning (a quality 6 jaw) but lacks the torque. I can push start it to get it spinning then it takes off. Or start up with the high speed then just swap to low speed and it runs. But from zero rpm it wont start on its own in low speed.
Here may be a few clues.
Its a 480v 3ph machine. I power it with 220v single phase at my house (not too many homes come with 480v 3ph) . Run through a step up transformer and dynamic phase converter. This system has worked great for many years. But alas lately the low speed has lost its ooomph.
A dirty contact....bad low speed winding in the motor???
The lathe sits in my garage in Southern California so its dry, and always pretty constant temperature..around 70. In summer sometimes 90F.
Any help from hardiinge aficionados would be greatly appreciated.
So lately the low speed setting on the motor does not want to start. It seems like it tries to get the chuck spinning (a quality 6 jaw) but lacks the torque. I can push start it to get it spinning then it takes off. Or start up with the high speed then just swap to low speed and it runs. But from zero rpm it wont start on its own in low speed.
Here may be a few clues.
Its a 480v 3ph machine. I power it with 220v single phase at my house (not too many homes come with 480v 3ph) . Run through a step up transformer and dynamic phase converter. This system has worked great for many years. But alas lately the low speed has lost its ooomph.
A dirty contact....bad low speed winding in the motor???
The lathe sits in my garage in Southern California so its dry, and always pretty constant temperature..around 70. In summer sometimes 90F.
Any help from hardiinge aficionados would be greatly appreciated.