I'm refurbishing an old lathe. I have so far changed headstock bearings,
I've got new pulleys, a VDF and a new motor. I should now find a
way to mount the motor. My initial test showed that when mounted onto
a hinged plate the motor start to vibrate somewhat. So now I'd like
find some instructions on how to make a solid mounting that would have
some sort of a release mechanism for changing pulleys. Any ideas?

Jura

In article ,
Jura wrote:

I'm refurbishing an old lathe. I have so far changed headstock bearings,
I've got new pulleys, a VDF and a new motor. I should now find a
way to mount the motor. My initial test showed that when mounted onto
a hinged plate the motor start to vibrate somewhat. So now I'd like
find some instructions on how to make a solid mounting that would have
some sort of a release mechanism for changing pulleys. Any ideas?

You might be able to improve your hinged plate by adding a spring, or a
section of threaded rod, to apply some tension to the plate in excess of
the motor weight. Or a better hinge (less slop) might do it. Or better
setup (being on a hinge does not cure being off to one side, etc).
However...

Look at the motor mounts on most any belt driven tool. The motor is
mounted to a plate with holes in it, and that plate sits on a plate with
slots in it. Bolts go through the holes, and into the slots. The relase
mechanism is a wrench.

For a quick release with more-or-less fixed motor, you might put a small
wheel, such as a skatboard wheel, where it can be levered to push in on
the outside of the belt.

--
Cats, Coffee, Chocolate...vices to live by

"Jura" wrote in message
...
I'm refurbishing an old lathe. I have so far changed headstock bearings,
I've got new pulleys, a VDF and a new motor. I should now find a
way to mount the motor. My initial test showed that when mounted onto
a hinged plate the motor start to vibrate somewhat. So now I'd like
find some instructions on how to make a solid mounting that would have
some sort of a release mechanism for changing pulleys. Any ideas?



Got some of that red segmented belt? Less spring, no memory in it. Good
way to control those two factors. Carefully align the pulleys, and make
sure you have a pretty good length of belt so the motor rides just below
horizontal. If you like, you can bungee the mount, but if my lathe is any
indication, it's not necessary if the other factors are handled.

Hi Jura

Very typical for a standard V belt, it likes to climb the pulley's side
walls and so start flabbering and vibrating, the Link belt being made
out of links is less vibration prone and though more costly, they are
long lasting and can be installed without taking the machinery apart.

As for the hinged motor mount a simple and quick release setup would be
an elbo/arm hinge, (just like your arm it will bent in the middle) with
a hinging point on the lathe and also on the motor mounting plate, the
hinge point bracket on the motor mount plate should be moveable for
adjustment when the belt length changes, ( make a 1" slot in the plate )
the arm/elbow hinge itself could be made out of flat metal stock (like 1
1/2" X 1/4") the length depending on the length from your lathe to the
end of your motor mount plate at lets say 45 degrees, and the 2 hinge
point brackets on both ends, out of short pieces of angle iron, one
bolted to the lathe and the other one to your motor mound plate, if you
weld a stop on one piece of the flat stock so that the elbow arm can
only go just past straight, and having the hinge point 2 or 3" from the
end on one arm at the elbow hinge point, you now can tighten your belt
by pushing the hinge down and it will stay there

Now if you weld an other piece of flat stock at 90 degrees on the top
part of the arm/elbow hinge, just above the hinge stop, you can pull on
that as a handle and lift your motor up to change the belt position.

All this is clear to me, I don't know if I made it clear to you ???
If you want more help ask away.

Have fun and take care
Leo Van Der Loo

Jura wrote:
I'm refurbishing an old lathe. I have so far changed headstock bearings,
I've got new pulleys, a VDF and a new motor. I should now find a
way to mount the motor. My initial test showed that when mounted onto
a hinged plate the motor start to vibrate somewhat. So now I'd like
find some instructions on how to make a solid mounting that would have
some sort of a release mechanism for changing pulleys. Any ideas?

Jura

Thanks for everybody giving ideas. I think I will go for a small wheel
pushing the belt. That way I can mount the motor very solidly.


Jura

I used a c clamp from the motor mount to a board that the motor was
mounted upon with a hinge. i just loosen the c clamp to change pulleys and
re-tighten it when done. works pretty good although sometimes vibration
knocks
off the c clamp; the weight of the motor also holds down the tension, so
nothing happens
and i don't even notice when the c clamp pops off. It just provides a
little extra tension
when i want it. On the other hand; if I ever have to change the belt...that
means pulling
bearings and pulleys off the headstock. i'm not looking forward to that.
rich

"Jura" wrote in message
...
I'm refurbishing an old lathe. I have so far changed headstock bearings,
I've got new pulleys, a VDF and a new motor. I should now find a
way to mount the motor. My initial test showed that when mounted onto
a hinged plate the motor start to vibrate somewhat. So now I'd like
find some instructions on how to make a solid mounting that would have
some sort of a release mechanism for changing pulleys. Any ideas?

Jura

res055a5 wrote:
I used a c clamp from the motor mount to a board that the motor was
mounted upon with a hinge. i just loosen the c clamp to change pulleys and
re-tighten it when done. works pretty good although sometimes vibration
knocks off the c clamp;

For initial testing I also used clamps. I soon noticed that the
vibration indeed loosens them. That's why I'm looking for a more
permanent solution.

when i want it. On the other hand; if I ever have to change the belt...that
means pulling
bearings and pulleys off the headstock. i'm not looking forward to that.

I have no problems changing the belt as the pulleys are on the end
of the spindle. Then again, I just replaced the bearings. Very
tedious task as the construction of the spindle/headstock is somewhat
odd and every single piece was stuck. On top of that the spindle had
been beaten with a hammer on the other end causing it to spread.
Fortunately, there is a very large metal lathe in the place where I
used to work, so I was able to get it back to correct diameter again.

Jura