On Fri, 1 May 2015 10:06:37 -0400, Leon Fisk
wrote:

On Thu, 30 Apr 2015 19:51:40 -0400
Bob Engelhardt wrote:

snip
I've never felt very strongly that the bearings are the problem - they
just don't seem tight enough to cause that much draw (5.6A on low speed
vs 2.9 spec'ed). But it was the only thing that I thought of.

Have you got a scope that you could look at the waveform with? I've
been wondering right along how accurate your ampmeter is when measuring
this type of waveform. I know you said it was a Fluke with RMS but...

The manual mentions that too light of an extension cord could cause
problems. It also mentions that they make both 50 and 60 hz models. Any
chance it might be a 50 hz unit? Followed your neighbor in from some
foreign country maybe...
A 50 hz unit will run fine on 60 - just a bit faster. Running a 60 on
50 will cause problems (or at least very likely would) %0 hz needs
more iron than 60.

Harbor Freight has their Infrared Temperature Gun on sale right now
with coupon for $25.99. Just in case you are wondering how hot the motor
gets ;-)

http://widgets.harborfreight.com/wsw...l_s1021_c1815b

I bought one a while back, same price with coupon. It works okay,
nothing special. I wanted to measure how hot my front wheel hubs
were getting on my truck. Was afraid I might have a caliper dragging...

Used it for other odds and ends since then.

One of these days I'll tear it apart. Suspect it may be capable of
doing some other things too but doesn't have the switches or something.
The most annoying thing about it is the default is Centigrade readings.
You have to switch it to Fahrenheit every time you use it. Centigrade
is okay, but I just don't think that way...