Re: VF2 Spindle Drive Fault F, Falls out of high gear
What you will find is that the Spindle Drive Fault F is the spindle drive failing. Check the alarm on the spindle drive itself and it will maybe say "Low DC Buss Voltage." When this happens, the motor does not jump out of gear, it looses all electrical contact and will not use any braking system and will just wind down in free wheel mode. Normally the spindle drive stops the motor, but not if the drive alarms out. Remember that the motor and or gear box does not have a lot of friction to slow it, that is done by the ReGen unit on top of the control cabinet and the spindle drive unit.
My VF2 was giving me a fit a week or so and was throwing drive faults and the spindle would do just that. It is the same as loosing a leg of power such as a fuse being blown on the pole outside. You have current but not what the machine needs, so the spindle freewheels down to zero.
When you get it all setup with your converter, verify the incoming voltage and test it out. Remember to check and use the proper input taps for the appropriate voltage.
By the way, mine cleared itself after a day and a half and has not alarmed out since. Found a re-builder just in case. Fingers crossed!
So, make it fail and then check the spindle drive itself and see what the alarm message is.
Mike
P.S.: The reason it does not seem to happen in low gear is that it is going through the transmission and in high gear it is direct drive (no gear), so the gearbox does not slow it down.
M
Two Haas VF-2's, Haas HA5C, Haas HRT-9, Hardinge CHNC 1, Bother HS-300 Wire EDM, BobCAD V23, BobCAD V28