VFD surface grinder wiring

Pevehouse

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H-M Supporter Gold Member
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Hello all, I just received my FUJI VFD and it got me thinking. I also plan to run the factory oil pump on this Harig 618 and I’m not 100% sure about how to wire the oil pump. Just figured there were probably some guys in here that could enlighten me. Thanks in advance
 
first , we would need to know what voltage the pump is running on
after that it's a matter of adding jumper wires or creating a circuit to run the pump
any pictures you can get will help out
 
There are different oil pumps used, is there some further information as to which one it is? If it is 3 phase, when connected you want to verify that it is pumping in the correct direction. On some other machines, although the machine is wired for 3 phase, the pump may be single phase and run off 2 legs of the incoming power or taps on a transformer, how was the pump wired previously?

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first , we would need to know what voltage the pump is running on
after that it's a matter of adding jumper wires or creating a circuit to run the pump
any pictures you can get will help out
I will get some pictures and do together for you guys this evening. Sorry for the delay. Been out of town for the weekend. I will post them up in just a little bit
 
Well, this is the pump I have that came with it. Appears to be 110 volt however, I am bringing 220 into the cabinet for the vfd so unless the vfd has an output of 110 somewhere , I will need to find 110 volts to run the pump
 

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There are different oil pumps used, is there some further information as to which one it is? If it is 3 phase, when connected you want to verify that it is pumping in the correct direction. On some other machines, although the machine is wired for 3 phase, the pump may be single phase and run off 2 legs of the incoming power or taps on a transformer, how was the pump wired previously?

View attachment 496904
There was a transformer in the cabinet that must have been running the pump
 
Plug is single phase, most likely was run off the transformer. I would put it back into the machine or you can purchase a single phase control transformer to supply the 110VAC. The pump draws very little current so should get by with a 100-200VA control transformer. I would recommend getting one with the ability to fuse the output so if the pump motor locks up the fuse would open. I would also add a normally open pressure switch to the oil line and use that to prevent a run command to the VFD (use 3 wire control and it can open the stop input if the pressure is below a certain level contact goes open). Probably something like 10 PSI, there was a factory oil pressure switch.
 

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Plug is single phase, most likely was run off the transformer. I would put it back into the machine or you can purchase a single phase control transformer to supply the 110VAC. The pump draws very little current so should get by with a 100-200VA control transformer. I would recommend getting one with the ability to fuse the output so if the pump motor locks up the fuse would open. I would also add a normally open pressure switch to the oil line and use that to prevent a run command to the VFD (use 3 wire control and it can open the stop input if the pressure is below a certain level contact goes open). Probably something like 10 PSI, there was a factory oil pressure switch.
Thank you for your help. That’s how I will run it then. The transformer was a pretty large one. I will look and see what is available as far as transformers go. The pressure switch should be wired into the control side of the vfd to shut the machine down correct? If in the case I loose oil pressure. I think I got what you’re saying. Thank you
 
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