LumberJocks

Grizzly 19-inch 3-phase bandsaw- vfd help

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by Praedo posted 10-13-2013 02:34 AM 1023 views 0 times favorited 11 replies Add to Favorites Watch
View Praedo's profile

Praedo

7 posts in 537 days


10-13-2013 02:34 AM

Hello- I just bought a Grizzly 0514×3 for $700. It came with three blades and a static voltage converter. The owner barely used it and it’s like new. The only thing is that it’s an older model with no brake. I’m planning to run a new 220v circuit to the garage, but I’m looking for a good deal on a VFD to convert my single-phase 220v to three-phase. I’d like a unit that can stop the saw quickly to make up for the lack of any kind of brake. I’d prefer to get a used one and save some money. The motor is just under 10 amps. Having no experience with 3-phase power, does anyone have any suggestions as to which VFD I should look for? Will a 3hp unit work with my 3hp motor? Thank you for your time.

John.


11 replies so far

View JustJoe's profile

JustJoe

1554 posts in 703 days


#1 posted 10-13-2013 02:37 AM

I have two VFDs for my lathe and mill. If the motor is 3hp, then yes you get a 3hp VFD.
One of the settings you’ll be able to make on the VFD is the amount of ramp up/down time so you can set it to stop fairly quickly.
Both my VFDs are from TEMCO, and are the cheap CFW10 series.
http://www.temcoindustrialpower.com/search.html?category=Variable_Frequency_Drives

-- This Ad Space For Sale! Your Ad Here! Reach a targeted audience! Affordable Rates, easy financing! Contact an ad represenative today at JustJoe's Advertising Consortium.

View darthford's profile

darthford

532 posts in 589 days


#2 posted 10-13-2013 06:39 PM

Never heard of those JustJoe that’s pretty cool. Sometimes there are some good deals on used 3 phase equipment.

View Loren's profile

Loren

7618 posts in 2313 days


#3 posted 10-13-2013 06:51 PM

You should be aware that VFDs may not last for years and years.
I see the main advantage as cheap phase conversion combined
with speed control. If you have more than one 3 phase
machine and don’t need variable speed a rotary converter
is not too expensive to put together and will probably outlast
VFD units. VFDs can get messed up by dust getting in them
since they have ventilation ports.

I don’t actually see a brake making a band saw much safer, but
it does allow a used to stop a large saw faster in order to change
the setup. My Hitachi resaw gets quite a lot of momentum in
the heavy wheels and takes a while to stop on its own. It has
a hand brake which is very simple mechanically and something
like it would not be difficult to fabricate.

Also, stopping the motor won’t stop the saw. It will still
spin down the same. With a VFD of course you could run
the saw slower and then it would stop quicker.

-- http://lawoodworking.com

View REO's profile

REO

614 posts in 739 days


#4 posted 10-13-2013 08:56 PM

JJ why do you use the vfd on the mill? I have some 3 phase equipment on a RPC and two lathes on VFDs. I have kept the mill on 3 phase from the RPC for power tapping and instant reverse. the lathe I have has a clutched forward and reverse. Just asking.

View JustJoe's profile

JustJoe

1554 posts in 703 days


#5 posted 10-13-2013 09:02 PM

I had to decide between a VFD or an RPC. VFD was cheaper for me and it does the jobs I want – on/off/speed. I’ve never needed reverse on the mill – instant or otherwise, but I’m a hobbyist.

-- This Ad Space For Sale! Your Ad Here! Reach a targeted audience! Affordable Rates, easy financing! Contact an ad represenative today at JustJoe's Advertising Consortium.

View toolie's profile

toolie

1764 posts in 1293 days


#6 posted 10-13-2013 10:31 PM

this thread at sawmillcreek.org might be helpful with this question:

http://www.sawmillcreek.org/showthread.php?189669-Running-my-3-phase-bandsaw-using-a-VFD&highlight=band+saw

-- there's a solution to every problem.......you just have to be willing to find it.

View exelectrician's profile

exelectrician

1596 posts in 1092 days


#7 posted 10-14-2013 02:13 AM

Places that sell VFD’s are ;

automationdirect.com

www.automation4less.com

www.yaskawa.com

-- Love thy neighbour as thyself

View Praedo's profile

Praedo

7 posts in 537 days


#8 posted 10-16-2013 01:59 AM

Thank you all very much for helping out.

View Praedo's profile

Praedo

7 posts in 537 days


#9 posted 10-18-2013 02:53 PM

Wow, those Weg CFW-10 FVD’s look pretty good. I read in the instructions that for the 3hp model (which is what I need) I can hook up a 39 ohm resistor for dynamic braking. That means that the unit can turn the motor into a generator, and the resistor can eat up the extra power and convert it to heat. I found a 100w aluminum resistor that should do the job just fine.

In addition, I can set up remote controls. As it turns out, the on and off switches already on the saw will work fine. I also ordered a potentiometer so that I can replace the key start with a speed control knob. The key start will be unnecessary since I’ll be adding a plug to plug in the VFD. The guys who sold me the saw lost the key anyway, so they had it bypassed.

Thank you again for the help. It’ll be a couple of weeks before I’m up and running, but I’ll post the results. I’m looking forward to getting this beast going!

View MedicKen's profile

MedicKen

1599 posts in 2127 days


#10 posted 10-19-2013 02:43 AM

I would get this one

http://www.factorymation.com/Products/FM50_230V/FM50-203-C.html

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com

View Praedo's profile

Praedo

7 posts in 537 days


#11 posted 10-30-2013 12:25 AM

Well, I finally got it running. I went with the Weg VFD- it works perfectly. Ran backwards at first, but that was easy to fix. Speed controls very nicely, and I was able to use the on/off switch on the front of the saw. Thanks again for all of your help.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase