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  #1   Report Post  
william kossack
 
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Default a question about the Nova DVR motor

When I described the Nova DVR to a neighbor he described it as I think a
direct mount and cautioned about using a lathe where the turning stock
was directly mounted to the motor. He wanted to know if there was a
kill switch to quickly shut down if something happened.

Anyone had problems with this setup?

  #2   Report Post  
Peter Teubel
 
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Default a question about the Nova DVR motor

On Tue, 13 Jan 2004 14:19:47 GMT, william kossack wrote:

When I described the Nova DVR to a neighbor he described it as I think a
direct mount and cautioned about using a lathe where the turning stock
was directly mounted to the motor. He wanted to know if there was a
kill switch to quickly shut down if something happened.

Anyone had problems with this setup?


Well, sort of. I generally wire up power switches on BOTH ends of all my lathes for safety. But its not much good on the DVR. When
you cut power to the lathe, it still spins (under power) for a few seconds before it finally shuts off. Its a function of the
motor design itself, NOT the fact that its direct drive.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com
  #3   Report Post  
Derek Hartzell
 
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Default a question about the Nova DVR motor

You imply that its not much good to have a switch on the tailstock end. Are
you saying that when you shut off with a switch at the tailstock that it
keeps going more than it would if shut down at the headstock controls, i.e.
a braking function is not activated or something similar? Otherwise, if the
lathe slows down at the same rate, the tailstock switch would seem to be
helpful.

Well, sort of. I generally wire up power switches on BOTH ends of all my

lathes for safety. But its not much good on the DVR. When
you cut power to the lathe, it still spins (under power) for a few seconds

before it finally shuts off. Its a function of the
motor design itself, NOT the fact that its direct drive.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com



  #4   Report Post  
Peter Teubel
 
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Default a question about the Nova DVR motor

Remember, the DVR has a power switch *AND* an on/off button. By pushing the OFF button, you engage the dynamic braking and the
lathe slows down immediately. By throwing the POWER SWITCH or removing the power entirely (unplug it), it will continue to spin
under power for a few seconds before shutting down. When cutting the power at 3500rpms, the lathe continues for about 1 second
before shutting down. At 500, its more like 4 seconds. Obviously, there are some capacitors in the unit which are draining.

So a switch at the tailstock end is better than nothing, but it will not provide INSTANT shut down.


On Tue, 13 Jan 2004 07:12:05 -0800, "Derek Hartzell" wrote:

You imply that its not much good to have a switch on the tailstock end. Are
you saying that when you shut off with a switch at the tailstock that it
keeps going more than it would if shut down at the headstock controls, i.e.
a braking function is not activated or something similar? Otherwise, if the
lathe slows down at the same rate, the tailstock switch would seem to be
helpful.

Well, sort of. I generally wire up power switches on BOTH ends of all my

lathes for safety. But its not much good on the DVR. When
you cut power to the lathe, it still spins (under power) for a few seconds

before it finally shuts off. Its a function of the
motor design itself, NOT the fact that its direct drive.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com




Peter Teubel
Milford, MA
http://www.revolutionary-turners.com
  #5   Report Post  
william kossack
 
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Default a question about the Nova DVR motor

that is the answer I was looking for

thanks

now I just have to decide if I can aford the beast

Peter Teubel wrote:

Remember, the DVR has a power switch *AND* an on/off button. By pushing the OFF button, you engage the dynamic braking and the
lathe slows down immediately. By throwing the POWER SWITCH or removing the power entirely (unplug it), it will continue to spin
under power for a few seconds before shutting down. When cutting the power at 3500rpms, the lathe continues for about 1 second
before shutting down. At 500, its more like 4 seconds. Obviously, there are some capacitors in the unit which are draining.

So a switch at the tailstock end is better than nothing, but it will not provide INSTANT shut down.


On Tue, 13 Jan 2004 07:12:05 -0800, "Derek Hartzell" wrote:



You imply that its not much good to have a switch on the tailstock end. Are
you saying that when you shut off with a switch at the tailstock that it
keeps going more than it would if shut down at the headstock controls, i.e.
a braking function is not activated or something similar? Otherwise, if the
lathe slows down at the same rate, the tailstock switch would seem to be
helpful.



Well, sort of. I generally wire up power switches on BOTH ends of all my


lathes for safety. But its not much good on the DVR. When


you cut power to the lathe, it still spins (under power) for a few seconds


before it finally shuts off. Its a function of the


motor design itself, NOT the fact that its direct drive.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com




Peter Teubel
Milford, MA
http://www.revolutionary-turners.com





  #6   Report Post  
Fred Holder
 
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Default a question about the Nova DVR motor

I've had a Nova DVR 3000 since last July and find it to be a very fine machine
and very safe. It is designed to shut down if you have a massive catch, which
probably makes it safer than most lathes. On this lathe, the headstock is the
motor and the motor shaft is the spindle of the lathe. The lathe shuts down best
by pusing the off button, not turning off the power switch.

If you are thinking of getting a DVR, I would do so with no reservations. It is
one fine lathe.

Fred Holder
http://www.fholder.com/

In article 78TMb.43577$I06.276792@attbi_s01, william kossack says...

When I described the Nova DVR to a neighbor he described it as I think a
direct mount and cautioned about using a lathe where the turning stock
was directly mounted to the motor. He wanted to know if there was a
kill switch to quickly shut down if something happened.

Anyone had problems with this setup?


  #7   Report Post  
Peter Teubel
 
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Default a question about the Nova DVR motor

On Wed, 14 Jan 2004 00:52:32 GMT, william kossack wrote:

that is the answer I was looking for

thanks

now I just have to decide if I can aford the beast


From direct experience....its WELL worth the money. A fine lathe with a surprisingly powerful motor. IMHO, if they would just put
a dial in place of the buttons for speed change and offer a REAL remote control panel, I'd call it perfect.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com
  #8   Report Post  
william kossack
 
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Default a question about the Nova DVR motor

Is the regular Nova 3000 sold anywhere any more?


william kossack wrote:

When I described the Nova DVR to a neighbor he described it as I think
a direct mount and cautioned about using a lathe where the turning
stock was directly mounted to the motor. He wanted to know if there
was a kill switch to quickly shut down if something happened.

Anyone had problems with this setup?



  #9   Report Post  
Peter Teubel
 
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Default a question about the Nova DVR motor

On Thu, 15 Jan 2004 05:10:59 GMT, william kossack wrote:

Is the regular Nova 3000 sold anywhere any more?


Yes. Woodcraft still sells them. Other too, I'm sure.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com
  #10   Report Post  
william kossack
 
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Default a question about the Nova DVR motor

not on their web site

when you go to the page for the nova 3000 it says you can add it to your
basket

Peter Teubel wrote:

On Thu, 15 Jan 2004 05:10:59 GMT, william kossack wrote:



Is the regular Nova 3000 sold anywhere any more?



Yes. Woodcraft still sells them. Other too, I'm sure.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com





  #11   Report Post  
Peter Teubel
 
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Default a question about the Nova DVR motor

Yes, I just noticed that myself. I know the store in Woburn, MA has one in the back. Other stores may have them in inventory. Also
check out http://www.kmstools.com. They still carry it.

On Thu, 15 Jan 2004 14:19:27 GMT, william kossack wrote:

not on their web site

when you go to the page for the nova 3000 it says you can add it to your
basket

Peter Teubel wrote:

On Thu, 15 Jan 2004 05:10:59 GMT, william kossack wrote:



Is the regular Nova 3000 sold anywhere any more?



Yes. Woodcraft still sells them. Other too, I'm sure.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com




Peter Teubel
Milford, MA
http://www.revolutionary-turners.com
  #12   Report Post  
Reyd Dorakeen
 
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Default a question about the Nova DVR motor

whhats the difference between the nova 3000, and the nova DVR?


in article , Peter Teubel at
wrote on 1/15/04 4:25 PM:

Yes, I just noticed that myself. I know the store in Woburn, MA has one in the
back. Other stores may have them in inventory. Also
check out
http://www.kmstools.com. They still carry it.

On Thu, 15 Jan 2004 14:19:27 GMT, william kossack
wrote:

not on their web site

when you go to the page for the nova 3000 it says you can add it to your
basket

Peter Teubel wrote:

On Thu, 15 Jan 2004 05:10:59 GMT, william kossack
wrote:



Is the regular Nova 3000 sold anywhere any more?



Yes. Woodcraft still sells them. Other too, I'm sure.

Peter Teubel
Milford, MA
http://www.revolutionary-turners.com




Peter Teubel
Milford, MA
http://www.revolutionary-turners.com


  #13   Report Post  
william kossack
 
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Default a question about the Nova DVR motor

I called the local woodcraft and they said that even though it was still
listed in the catalog they can't sell the regular nova 3000

  #14   Report Post  
william kossack
 
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Default a question about the Nova DVR motor

The main thing I know of is Nova 3000 you can change the motor from the
standard 1 hp up to a 1.5 DC motor.

The DVR is computer controlled variable speed supposedly 1.75 HP. You
can not change the motor because the motor
is made around the spindle. Therefore there are no pullies or belts.
One concern I've heard is that if the motor dies your sol after the
warrenty has expired. The DVR also has a better tail stock supposedly
but I've never seen the two side by side

The DVR goes for about $1800 while the plain 3000 used to go for $800
without a motor (I think)

Reyd Dorakeen wrote:

whhats the difference between the nova 3000, and the nova DVR?



  #15   Report Post  
Leo Lichtman
 
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Default a question about the Nova DVR motor


Reyd Dorakeen wrote: whats the difference between the nova 3000, and the
nova DVR?
^^^^^^^^^^^^^^^^
The main difference is in the drive. The 3000 uses a fairly conventional
belt drive, with step-cone pulleys--the motor can be either a constant speed
induction motor, or a variable speed motor.

On the DVR, the motor shaft IS the spindle--no belt drive at all. The motor
is a radical design, using iron vanes in a rotating magnetic field. The
field is produced by a set of stationary coils connected to a computer,
which feeds pulses to the coils to produce the rotational speed and torque
called for by the operator. The REALLY interesting thing about it is that
the field rotates in a direction OPPOSITE to the rotation of the armature.
I'm not going to try to explain that--you can see it on their website,
though.

Owners report that the rotation is so smooth and vibration-free that they
get extraordinarily smooth cuts.

I understand that the DVR has a much improved tailstock (over the 3000.)




  #16   Report Post  
Sanaka
 
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Default a question about the Nova DVR motor

william kossack wrote in message news:DhpNb.56160$5V2.68900@attbi_s53...
Is the regular Nova 3000 sold anywhere any more?


Try Woodturner's Catalog. I know they just got in (around 1/14/04) the
DVR, and I thought they got the regular 3000 too.

Sanaka



william kossack wrote:

When I described the Nova DVR to a neighbor he described it as I think
a direct mount and cautioned about using a lathe where the turning
stock was directly mounted to the motor. He wanted to know if there
was a kill switch to quickly shut down if something happened.

Anyone had problems with this setup?

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