stalling 2hp 2x72 belt grinder

Are you over driving the motor rpm by much? The more it's over driven the less torque it will produce for the same HP

Also, it it possible you have the motor wired for 480 instead of 208/240?
 
Another one. Double check settings 119 through 125 for stall prevention. Maybe turn them off by setting them to zero

and 145 torque compensation & 147 for slip compensation
 
I'm beginning to suspect the motor as the problem. That motor plate you showed photo of left me confused, and the 6 motor leads for sure is confusing for a standard 3ph motor. Your VFD is the similar as some I've used with good results.
 
Check the residence across the motor leeds. Make sure all are the same

I doubt the motor is the problem. I've seen and wired many motors with that wire configuration
 
kdnolin said:
View attachment 1450259 Not much inside the peckerhead.
simple to wire.
I will check the settings mentioned by B Backyard too.
Click to expand...
I have same motor like that one on one of my grinders.....1.1KW on 2800 Rpm ....I just try to stall it on 1/1 drive ...hard to do that with 2 inch width of steel , if I use long piece of steel or wood vertically on platen ...Yes !
You have to connect two phase and neutral wire ....It is good motor , thermally protected.
d6saVEH.jpg

XiyU84V.jpg
 
Natlek said:
You have to connect two phase and neutral wire ....It is good motor , thermally protected.
d6saVEH.jpg

XiyU84V.jpg
Click to expand...

??? Are you sure about that? For a three phase motor. Sometimes but rarely for a three phase Y connection you can add a ground or a neutral to the center tap but I think he has it wired as a delta connection and thus no neutral
 
Mine is wired for delta, N Natlek has his wired for Y. I connected the three leads from VFD to the motor and grounded it. The power output on the VFD is clearly marked.
 
Backyard said:
??? Are you sure about that? For a three phase motor. Sometimes but rarely for a three phase Y connection you can add a ground or a neutral to the center tap but I think he has it wired as a delta connection and thus no neutral
Click to expand...
I m so sorry , you are right ...........ALL three are phase of course no neutral.I don t know what i was thinking ..... I was playing just right now with my sand furnace and on 220 V /one phase and neutral / was somehow slow so i try it on two phase on my three phase outlet ...........which mean on 380 V so i write what i write without thinking , have no idea how I come to that .Sorry again for confusion , all three wire a phase of course .
Again about stalling motor , i use lot of pressure when grinding , all of my body weight ...but if I use more pressure /which will be no normal for me / i can feel how motor slow down .
 
Natlek said:
I m so sorry , you are right ...........ALL three are phase of course no neutral.I don t know what i was thinking ..... I was playing just right now with my sand furnace and on 220 V /one phase and neutral / was somehow slow so i try it on two phase on my three phase outlet ...........which mean on 380 V so i write what i write without thinking , have no idea how I come to that .Sorry again for confusion , all three wire a phase of course .
Again about stalling motor , i use lot of pressure when grinding , all of my body weight ...but if I use more pressure /which will be no normal for me / i can feel how motor slow down .
Click to expand...

No problem. We all make mistakes every now and then
 
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