- Joined
- Sep 11, 2012
- Messages
- 329
The electrical noise they refer to is noise over the power wire from the drive back upstream to the panel then to all the panel circuits and the power company transformer. Then off to the neighbors and ultimately the dam or steam plant or where ever you power comes from. It can not be totally stopped but it can be controlled by using inline filters in the power wiring both into and out of the drive. The shielded control wiring is to protect the drive from outside sources. Like a ghost starting your mill up. Not to protect outside sources from your drive.
The two pole contactor the previous poster refers to should be installed as the first item power enters coming into the control cabinet. Two pole for single phase, three pole for three phase.
My 2hp Bridgeport is connected exactly as you wish to do I believe. VFD is used for generation of a three phase supply of power, acceleration and deceleration of the drive motor. Forward and reverse direction control. All speed control is via the Reeves Drive on the mill its self. I have a digital tach but have never installed it as I trust what Bridgeport wrote on the dial to indicate speed. I don't find exact speed control to be that beneficial or important. Whether the spindle is going 950 or 1050 when you want 1000 is no big deal. As long as it is close to 1000.
As for voltage, read your supply value. Enter that value when programming the drive. Same for amperage, cycles, service factor and other values. Just enter what is on the motor nameplate. No secrets there.
The pedestal of my mill has a door opening into the pedestal column. I fabed a backplate and mounted the drive and terminal strip in there then fabed up a pushbutton box to mount my pushbuttons in and mounted it on an articulating arm under the DRO. You have a good idea and I would not change a thing on mine.
If you drag a neutral wire in with the power wiring you can grab one leg of the power and use it to power your table drive, DRO, coolant pump, etc. Guessing you will use a 240v, 20a branch circuit to feed the mill. Be sure and tap this power ahead of the drive after the power relay. I don't use this relay option, nothing wrong with the idea I guess I don't figure my VFD failing very often.
Good drive can be found for not a lot of money so you do not have to live with a rice burner. And Hitachi is one of the best, but then it is Japanese.
The two pole contactor the previous poster refers to should be installed as the first item power enters coming into the control cabinet. Two pole for single phase, three pole for three phase.
My 2hp Bridgeport is connected exactly as you wish to do I believe. VFD is used for generation of a three phase supply of power, acceleration and deceleration of the drive motor. Forward and reverse direction control. All speed control is via the Reeves Drive on the mill its self. I have a digital tach but have never installed it as I trust what Bridgeport wrote on the dial to indicate speed. I don't find exact speed control to be that beneficial or important. Whether the spindle is going 950 or 1050 when you want 1000 is no big deal. As long as it is close to 1000.
As for voltage, read your supply value. Enter that value when programming the drive. Same for amperage, cycles, service factor and other values. Just enter what is on the motor nameplate. No secrets there.
The pedestal of my mill has a door opening into the pedestal column. I fabed a backplate and mounted the drive and terminal strip in there then fabed up a pushbutton box to mount my pushbuttons in and mounted it on an articulating arm under the DRO. You have a good idea and I would not change a thing on mine.
If you drag a neutral wire in with the power wiring you can grab one leg of the power and use it to power your table drive, DRO, coolant pump, etc. Guessing you will use a 240v, 20a branch circuit to feed the mill. Be sure and tap this power ahead of the drive after the power relay. I don't use this relay option, nothing wrong with the idea I guess I don't figure my VFD failing very often.
Good drive can be found for not a lot of money so you do not have to live with a rice burner. And Hitachi is one of the best, but then it is Japanese.