motor for KMG grinder

The Count,

so, if i get the VFD you recommended it will run 110 without any issues? i keep seeing 220 everywhere and nothing mentioning it being converted to 110. the link you posted. Is that a good price? sorry, im just asking, but will continue research.
 
work765 said:
The Count,

so, if i get the VFD you recommended it will run 110 without any issues? i keep seeing 220 everywhere and nothing mentioning it being converted to 110. the link you posted. Is that a good price? sorry, im just asking, but will continue research.
Click to expand...



download and read the manuals




http://www.factorymation.com/Products/FM50_115V/FM50-101-C.html



eatures:
TECO FM50 AC Drive, 1 HP, 115V 1 PH Input,

230V 3 PH Output, 4.2FLA, IP20



The problem with it being cheaper is taht it is not dust proof it's possible to smoke it.

The KB unit is sealed.


Search threads here for others that have made filtered dust enclosures

or





or
 
Nema 4 is the way to go. Unless you want to build an enclosure but that will cost you more money. A nema 4 enclosure and remote pot and start and stop buttons will not be cheap.

I would recommend using a step pulley setup on a single phase 110 motor. Or just bite the bullet and get a 2 hp 3phase with kb vfd. It will run at a derated 1.5 hp on 110 but then if you add a 240 line it will run at 2 hp.

I think the best thing to do is a get a 240 line where you will have the grinder. 75' of 6/3 cost me $95 and that got the job done. Now I have a line for my compressor, belt grinder and any other 240 machine that I will acquire.

Just some more thoughts to confuse you.
 
I bought a chinese VFD for about $175.00 for a 9" disk grinder. I'll do a review once I get around to setting it up. I also bought the KBAC for my 2x72 build.
 
I have both the KB and a TECO . The TECO has run in a lightly enclosed box for over a year now everyday. I take the time to blow it out with compressed air frequently and have had zero problems. One thing for sure is the face has a plastic coating over the buttons and from constant speed changes has worn through. I think I paid around $120 for it.

The KB is a very nice unit. Just turn the nob and you are in business. But if you buy the KB it is a buy once cry once type of deal. You can run a few machines with one controller if you are handy. The one thing I regret about many tool purchases is whenever I "cheap out" I end up buying what I wanted in the first place therefore paying and extra third or more when I do upgrade.

The Count has covered this in his responses . You have the info you need to make a decision that works for you.
 
ok.. So, I figure its worth spending the extra 350 for a variable drive now,, instead of wondering what if...

question... for this controller http://www.electricmotorwholesale.com/9520-KBAC-27D/ I see that it has options when checking out (On/Off AC Line Switch: Forward-Stop-Reverse Switch: Signal Isolator Options: AC Line Filter: (1-2 Day lead time): Liquidtight Fittings:) Which of these do i need to add- if any? I just assumed it had an On and Off switch built in... Also for the KBAC with GFCI,, that is just basically a built in fuse box so to speak? Not necessary right?

Second,, once I purchase this VFD.. the first thing i have to do is wire it for 110ac? My uncle is an electrician.. I plan to take controller and motor to him for complete hook up, because all of this is way over my head.

Third.. Of the two leesons,,
http://www.ptjindustrial.com/Leeson_110917_p/110917.htm
http://www.ptjindustrial.com/Leeson_110918_p/110918.htm

its only a difference of RPMs... which would you guys get? My plan is to just buy a pulley from KMG depending on the RPM of the motor.. I realize i can put a pulley on either to offset the RPM.. but what is the ideal RPM to start with for Knife grinding?

Also, where do you guys buy the wiring harness for the VFD to wall? and VFD to motor? sooooo many question.. sorry

thanks everyone for all the help!
 
work765 said:
ok.. So, I figure its worth spending the extra 350 for a variable drive now,, instead of wondering what if...

question... for this controller http://www.electricmotorwholesale.com/9520-KBAC-27D/ I see that it has options when checking out (On/Off AC Line Switch: Forward-Stop-Reverse Switch: Signal Isolator Options: AC Line Filter: (1-2 Day lead time): Liquidtight Fittings:) Which of these do i need to add- if any? I just assumed it had an On and Off switch built in... Also for the KBAC with GFCI,, that is just basically a built in fuse box so to speak? Not necessary right?

Second,, once I purchase this VFD.. the first thing i have to do is wire it for 110ac? My uncle is an electrician.. I plan to take controller and motor to him for complete hook up, because all of this is way over my head.

Third.. Of the two leesons,,
http://www.ptjindustrial.com/Leeson_110917_p/110917.htm
http://www.ptjindustrial.com/Leeson_110918_p/110918.htm

its only a difference of RPMs... which would you guys get? My plan is to just buy a pulley from KMG depending on the RPM of the motor.. I realize i can put a pulley on either to offset the RPM.. but what is the ideal RPM to start with for Knife grinding?

Also, where do you guys buy the wiring harness for the VFD to wall? and VFD to motor? sooooo many question.. sorry

thanks everyone for all the help!
Click to expand...

I agree that's the best decision

On the KBAC-27D,
You need a switch to cut power to the unit.
They charge too much for a normal switch


toggle switch with 15/32 mount
DPST On/ OFF switch
Rated for 2 HP

Get the rubber switch boots too.
toggle_boot.jpg

You can get both in Home depot
I say Double Poles just to be safe so you break both hot and neutral lines


On setup for 110v - there is a wire spade you pull off one spot and put on another
Download and read the manuals and give them to your uncle
Read and save the setup instructions on the KMG wegsite too, they have suggestions for all the settings.

You will need 3x cable glands for a 1/2" NPT hole - also available at Home depot
cable-gland2.gif


wire to the vfd 14 gauge stranded 3 wires, wire between vfd and motor 14 or 16 gauge stranded 4 wires.



I'm sure I've typed all this before if you search and It's on the Beaumont KMG site too.
 
The Count.. thank you! Order placed on the controller.. :) I'll buy everything you mentioned at HomeDepot and print everything as you said.. thanks again!
 
The KMG setup manual covers the process very well. I just used their instructions plus the instructions in the VFD manual, went off without a hitch.
 
Order placed on Leeson 1740! read something about it having a bit more torque than the 3450.. KMG basically said they are the same, and it didn't matter which I one chose.

thanks again everyone!!
 
I wouldn't mind your questions being answered since I have a lot of the same and it's hard to search for certain things.

Op, are you saying that you are doing a 110v motor with the vfd? I was under the impression that you can't do single phase/110v with a vfd. If that's not what you're saying, carry on. :D
 
Excellent choice. IMHO, it's hard to argue with Sam's (123...) reasoning for just going right to a VFD.

I made knives with hand tools and saved up until I could buy my first grinder at 18. And I bought the Cadillac of the industry in 1996- A variable speed Burr King.

You're still going to royally screw things up when you start, but I strongly believe having infinitely variable speed makes the learning curve less harsh.

Do you HAVE to have it? Of course not... But you don't HAVE to have a grinder either. ;)

Good luck on your new venture into knife making! :)
 
you made the right decision. you won't regret it. have your uncle put in a 240v outlet.
 
PT Doc.. called and had them upgrade it to the 2HP.. I assume this grinder will be with me for a long time, and when the day comes that i get my own house.. I'll definitely run some 220... :) thanks

Also, the rep at PTJ said the motor would run at 2hp with a 110 outlet.. he said the VFD would be able to do that? Im not sure if he meant. It will run ( but at 1.5hp ) or if he meant it will produce 2hp because of the VFD.. I was a little confused.
 
work765 said:
PT Doc.. called and had them upgrade it to the 2HP.. I assume this grinder will be with me for a long time, and when the day comes that i get my own house.. I'll definitely run some 220... :) thanks

Also, the rep at PTJ said the motor would run at 2hp with a 110 outlet.. he said the VFD would be able to do that? Im not sure if he meant. It will run ( but at 1.5hp ) or if he meant it will produce 2hp because of the VFD.. I was a little confused.
Click to expand...

that was a good decision. technically a no brainer in my opinion. let us when when is all fired up and grinding.
 
If I missed this somewhere forgive me but....The original VFD that was linked for 110v looked like it was only for a 1 HP motor. Now you have moved up to a 2 HP motor.. Normally when you move up in HP on a VFD the price also goes up. You may have already taken all of this in consideration but the dollars will add up quick. I just finished building a VFD grinder in a box and was stunned how the little things add up. I got lucky and had a VFD and an old enclosure given to me from my brother, but I had $100 in wiring, paint and switches. It did turn out nice though..
 
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