Buying OBM grinder - what motor and VFD to get

Can I not run the VFD off of a standard outlet if it is a dedicated circuit? I really wasn't planning on putting in near my breaker box.
 
Busto said:
OBM is listing the smallest model of VFD's....Mod24...Mod27....Mod29....
Model 24 is for a 1hp 3phase motor that when powered by 110v will Net only 3/4 hp.
Model 27 is ....
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Wait, what? I have a 24d on 110 hooked up to a 3ph single HP motor. I have never heard that the Hp would be less with 110 vs 220. It only bogs down if I push really hard while flattening blanks on the flat platen. Are you sure this is accurate? I figured since 220 is coming out of the VFD, why would there be a loss if power?
 
On another note re: OBM grinders, if you plan on using a file guide for your plunges, it only works on the right side
~billyO
 
The piece that the platen is attached to gets in the way. I have a piece of tempered glass JB welded to my platen, adding about 1/4" and it still gets in the way.
 
Kevin McGovern said:
Wait, what? I have a 24d on 110 hooked up to a 3ph single HP motor. I have never heard that the Hp would be less with 110 vs 220. It only bogs down if I push really hard while flattening blanks on the flat platen. Are you sure this is accurate? I figured since 220 is coming out of the VFD, why would there be a loss if power?
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There is always loss changing single phase to three phase, even a rotary converter is only as efficient as the motor driving it. There is a bit more loss stepping 110 up to 220. 220 into the VFD and 220 out is about as efficient we can be with the tech available.

Your power loss may not be 1/2 hp like commonly quoted for a 2hp motor, more likely it's .25 hp.
 
Feezle said:
Can I not run the VFD off of a standard outlet if it is a dedicated circuit? I really wasn't planning on putting in near my breaker box.
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Yes that's fine. When i said panel I should have just said supply line.

I run a vfd for my disc grinder plugged into a 20a outlet.
 
Kevin McGovern said:
Wait, what? I have a 24d on 110 hooked up to a 3ph single HP motor. I have never heard that the Hp would be less with 110 vs 220. It only bogs down if I push really hard while flattening blanks on the flat platen. Are you sure this is accurate? I figured since 220 is coming out of the VFD, why would there be a loss if power?
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Please allow me to correct my post - ya'll are talking about the 24d/27D drives. I've never used one of those, not even read the documentation. I use the Chinese drives.

Kevin - you are using a 1hp drive connected to a 1hp motor and it's my understanding those work just fine with 120 vac input. The output is 3 ph 220vac range voltage to drive the motor.

Ken H>
 
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Is there any benefit to using slip compensation, or boost to prevent bogging down? It's not really an issue, but more power is always a plus.
 
Kevin McGovern said:
Wait, what? I have a 24d on 110 hooked up to a 3ph single HP motor. I have never heard that the Hp would be less with 110 vs 220. It only bogs down if I push really hard while flattening blanks on the flat platen. Are you sure this is accurate? I figured since 220 is coming out of the VFD, why would there be a loss if power?
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Yes...its in the documentation. the 2hp motor on 110v only yields 1-1/2hp...full HP can only be achieved on 220v.
 
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