Re: Need Advice for installng VFD's in Retrofitted Bridgeports
Originally Posted by
keebler303
It isn't for slowing down the spindle, the VFD can stop it quite quickly with regenerative braking.
On machines that I have converted, B.P.s and XLO's where Quik-Switch tooling is used I used an output on the VFD set to operate at zero speed to take the brake off, this way I ensure the brake is off as soon as the spindle starts, I have a manual overide switch if the brake is on and I need to turn the spindle for some reason.
This signal can also be used by auto tool changers to inform the spindle has stopped.
I also used another output to register up-to-speed, for a FIN signal to inform the controller that a M3/M4 is complete.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.