New toy: Setting up Colchester Student lathe

[Jonathan]

I've just wired the coolant pump up - took the end plate off the pump and changed it to Delta. To test it I've taken the main motor off the VFD and just connected the coolant pump without changing any settings on the VFD. It works fine, although there's not enough coolant in the tank to actually pump it round at the moment. I'll have to get some, again I'm not sure which to get and where.

The question that remains is if I'm OK to run the main motor and coolant pump on the VFD at the same time. The pump is 2 pole, and the main motor 4 pole, however the pump worked with the VFD still set to 4 pole. I've searched on other forums and people have done it.

The pump only draws 0.22A, but with a 3Hp motor on the VFD I'm right on the limit - especially with it being in delta(?) ... the problem is when the main motor has a big load on it is when I want to be running the coolant! If I do put the pump on the VFD I'll put a relay and switch in so that you can only connect the pump when the VFD is off.

This implies it is ok:

http://web.applied.com/base.cfm?page_id=3124#q5