Nova3000 problem
Andyc
A friend of mine has one which we have been using as a demo machine for our
club and we have a serious problem with it. It has the long Leeson motor on
it which. There is some rather disturbing lack of support in the HS which
translates to vibration. It runs smooth for spindle work so the spindle
seems OK. When we turn a bowl larger than 6 inches diameter the long motor
starts to vibrate which translates to the work. The problem occured even
when mounted on a VERY heavy stand as well as the stand sold by Nova. The
scroll chucks we've tried on it are each true and the motor was replaced to
no avail. With more than a dozen proturners and Engineers looking in the HS
best we can come up with is that the motor is mounted onto too flimsy an
area on the HS. That is the bracket sits (in part) on the sheet metal
rather than all on the casting. Is this correct? Is there a heftier piece
it should be attached to which was left out????
Robert
Are you sure that the Headstock is locked down tight? If it is loose,
you might get the vibration you are talking about. The sheet metal
covering is there to cover the pulleys and does not support the motor at
all. The machine would run just fine, although not as safely, without
the covering sheet metal.
Let us know how you fare.
Bob
pa...@my-deja.com
If tightening the HS dosen't help, you may want to try and tighten the
two engine mounting bolts that go directly into the cast HS. The only
other thing I could suggest is to slow down the speed on the larger
pieces. I often turn 10-14" bowls without any problem on the 3K.
Norm Blake, Northern KY area
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Fred Holder
I've never noticed that problem with my lathe, but I've never turned anything
larger than 18 inches on it. One question I would have concerns the headstock
lockdown pin. On earlier models such as mine, they had a short lock down handle
that made it difficult to lock the headstock down tightly. If it is not locked
down tightly, you could get the vibration you are talking about. Later models
have a long bar to lock down the headstock. If your friend's lathe has the short
lockdown lever with two black knobs on it, I suggest he get the upgraded
lockdown screw, swivel pin, and lever. This really locks the headstock down
tight. I believe this conversion is free. However, if you do it, replace both
the rotation pin and the lockdown screw, because the new lockdown screw is not
compatible with the old swivel pin.
Fred Holder, Camano Island, Washington USA
<http://www.fholder.com/>
In article <t3e4gni...@corp.supernews.com>, "Andyc" says...
Fred Holder
<http://www.fholder.com/>
Dave Shombert
I don't recall vibration being that much of a problem until I added the
Leeson DC motor, which hangs way out over the edge of the platform, as
you describe. One thing that helped was to play with the belt tension -
the vibration was worse when the belt was too tight. Another thing that
helped was to insert a support block of scrap wood under the end of the
motor, but this got to be a pain when swiveling the headstock out. I
emailed Teknatool for suggestions but never got a response. A couple
weeks ago, I hit on the ultimate solution - I bought a General 20-260.
Boy, I wish that thing would get here.
Dave Shombert
Elkins, WV
andyc
applied to the previous owner of this lathe (however he went with a
Woodfast).
In the meantime...
The HS is definately secure. I fear the vibration is an inherent "feature"
when one has the LONG Leeson motor hanging out the back of the HS. If I had
one of these lathes I would look for a short body motor alternative.
During the last demo we had one of the club members hold onto the motor
during the worst of the vibrations. In the end, the bowl was turned, but
the vibration during off-balance truing added a great deal of work and tool
movement during the process. It ran fine for my long-stem goblet demos.
"Dave Shombert" <shom...@meer.net> wrote in message
news:3A37C338...@meer.net...
Lyn J. Mangiameli
vibration in the headstock, motor or spindle. I often turn some really big
(14-16) inch logs, and while I can get the whole lathe and base to vibrate, I
don't have seperate or additional vibration in the motor or headstock. So I
would suggest that there is a problem here that is not directly related to the
"long" Leeson's in general. You shouldn't need to, but Technatool also offers
a mounting plate that will bolt to the bottom of the Leeson Motor (as opposed
to it's NEMA face). You might want to consider this as a way to increase
rigidity. Why not contact Roger Latimer at Technatool and get his input.
Lyn
Scott Hogsten
> It has the long Leeson motor on
>it which. There is some rather disturbing lack of support in the HS which
>translates to vibration.
I've have the Nova 3000 with the Leeson motor since June and I have not had any
vibration problems. I have turned a few spindles and a lot of bowls up to 14"
without any problems. I do have a couple of questions/suggestions. I wonder if
you need to adjust the play on motor adjustment some ? I have mine set to there
is just a slight resistance to sliding it. I may not remember correctly but
there was a way to assemble the motor and leave a gap between the pivot point
and the head of the lathe and I could see this causing some vibration. Also I
had to shim my motor slightly to get the belts to align (I had to use a washer
that was twice the thickness of the factory supplied one). One other question
is the belt ok, no damage or lost groves ?
Scott
Arthur Fitzpatrick
I seem to recall that The early Nova-3000 lathes used a stamped
(sheet-metal) motor mount. The current design utilizes a cast mounting
plate which pivots on the mail headstoch casting to adjust belt tension. If
you can get a look at one sold in the last year it may help. Or go to the
Teknatool web site and look at the drawings in the manual which is on line.
I have had mine about 13 months when 5 of us locally bought them. The
reason that decided it for me was the new motor mounting. I recall the
other one looked "cheesey".
Good Luck,
Art
"Fred Holder" <fr...@fholder.com> wrote in message
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