Oliver 232 restoration #4: Motor is good to go!!

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Blog entry by MedicKen posted 11-21-2010 05:43 AM 7253 reads 1 time favorited 6 comments Add to Favorites Watch
« Part 3: A little motor work Part 4 of Oliver 232 restoration series Part 5: Finally a little more work on the Oliver »

A little quick update on my progress. The weather here has been a little on the iffy side for painting lately. We have light rain off and on for the past 2 days so I decided to finish the motor. It was completely stripped of all paint and rust and then repainted a nice gloss black. I replaced the bearings and polished the old grease cups. I reassembled the motor and got it ready to run. A few weeks ago I ordered a new VFD to power the motor and it arrived late last week. I temporarily wired the motor and hit the switch. It started spinning really slowly, the VFD comes set at only 5Hz. I slowly increased the output and the motor spun up to speed very nicely. I let the motor run at full speed for about 30 minutes while clamped to the bench, its 3hp and all cast iron, I didn’t want it hitting the floor. After the test run I shut it down and it wasn’t even warm. One of the nice functions of the VFD is a slow start feature. I have set the motor to ramp up to full rpm over 3 seconds and also stop in 3 seconds. Without that feature the motor would free spin for almost 90 seconds!!

-- My job is to give my kids things to discuss with their

6 comments so far

View patron's profile


13609 posts in 3370 days

#1 posted 11-21-2010 05:49 AM

well done

wish i had the time

getting those old tool working

is sure better than buying these days

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Bluepine38's profile


3379 posts in 3114 days

#2 posted 11-21-2010 09:08 PM

I did a little research on the VFD you mentioned and can not find enough info to know if I could set one up.
I am not an electrician, but I have done some 110 and 220 amp wiring and rebuilt a couple of electric motors.
As long as I have good diagrams and instructions, I do not have any trouble. I have done grunt labor for a
couple of electricians and picked up a few pointers. Could you tell me where you bought the VFD and if it
comes with good instructions? Thank you for any help you can provide. Thank you for the updates on that
wonderful monster you are rebuilding.

-- As ever, Gus-the 79 yr young apprentice carpenter

View MedicKen's profile


1615 posts in 3491 days

#3 posted 11-22-2010 02:59 PM

Bluepine....I sent you a message that I think addresses the wiring issue. The wiring for a VFD could not be any easier, if you can replace a switch or wall receptacle you can wire and install a VFD. Here is a simple drawing that I have from an owwm member that is the VFD guru.

As you can see it is very easy. This first diagram is a simple 3 wire control. The one thing you need to remember is the switch controls the VFD, NOT the motor. In the wiring you will notice there is no wiring connection from the switch to the motor.

In this diagram we have added an Emergency stop switch. To me, I don’t see any real advantage to that. In the first system there is a stop switch which does the same thing.

-- My job is to give my kids things to discuss with their

View Beginningwoodworker's profile


13345 posts in 3701 days

#4 posted 11-23-2010 05:20 PM

Well done!

View NBeener's profile


4816 posts in 3202 days

#5 posted 11-23-2010 05:32 PM


I remember that 30-minute period. All our lights went dim, and there was this constant “wub – wub – wub – wub” noise, off in the distance :-)

Great progress !

-- -- Neil

View Bluepine38's profile


3379 posts in 3114 days

#6 posted 11-23-2010 05:45 PM

The wiring diagrams are perfect, as soon as the Xmas list for the kids, grandkids and great grandkids is
caught up and paid for I will have a Teco FM50 in my future. Thank you for your help and we are waiting
to hear what that beautiful monster sounds like with a blade singing through the wood. Keep us posted.

-- As ever, Gus-the 79 yr young apprentice carpenter

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