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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? |
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 |
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 |
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 |
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 |
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? |
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 |
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? |
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 |
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 |
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 |
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 |
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? |
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.) |
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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