Opinions on Nova DVR XP

Should not be an issue, the local field (generated by the DVR motor) is not effected by any of those small " dot" magnets. Even the really powerful rare-earth type. That might not be true of the large/hugely powerful 10,000 gauss magnets

Late last year I did a "search" of the Teknatool web-site and noticed that all references to the "forth coming" remote. My guess is the project got dropped

Try this one, he's been very good to me and usually responds within 12 hours: "Fan Huang"

I just ordered a part that isn't on their parts order page.. He was very helpful.. ($8 shipping on a $2 part, but not his fault)

He was also the one that answered a few questions for me when I was shopping for the XP.... Like min. speed of 100 rpm and stuff.. Still seems silly, but I guess it's the magnetic rotor or whatever.. would be nice to have a zero or 100 low rpm..

mac

Please remove splinters before emailing

"snip------------------------->

zero isn't all that useful, just turn the power off, but 5 or 10 RPM is useful - I use that speed a lot to dry lacquer. But, with a direct drive system,that means the motor needs to turn at that speed, and that poses some challenges.

There are a couple of advantages to a belt drive - one is that the motor can turn faster than the spindle, so you can get torque multiplication, and another is that you get vibration isolation from the motor - not much of an issue with a decent motor for wood turning

Thanks, but that was who I emailed the last couple of times. He was prompt in replying to the questions about the new bed extension (which, annoyingly, doesn't attach to the old bed). It's not exactly urgent, but I'll try again.

Duncan

Yeah, that was sort of what he said, Bill... The low speed of 100 rpm is fine, but you always want more than you get, right? Also, the more I read about HOW the motor works in this thing, the more I'm impressed.. No windings? Weird!

mac

Please remove splinters before emailing

I just read what was posted on the Nova site about this motor - I don't see anything amazing, it looks like, and is described like a standard stepper motor, and not a very fancy one at that - these kinds of motors are very common - though perhaps not on a wood lathe. The 100 RPM limit is probably due to the design of the motor - it looks like the armature has 8 poles, so it is probably an artifice to avoid "cogging" - the motor is actually turning in steps of maybe 1/8 or 1/16 th of a turn - below 100 RPM those steps may become noticable enough to bother the turner or to cause some effect on the turned result - for example, at 60 RPM you would be having 8 steps per second - that would be quite visible.

There is a significant amount of "gee wiz" type snake oil in that motor description - that doesn't make it bad, but does mean that you don't fall in love with the words. If the lathe works for you, then great.

Reading the description, I think I would not like it - I would want a knob to set speed, I would want the very slow minimum speed, and I would want a lower tech motor so I could replace it or the controller if there were a problem. But then, that is me and many folks are different....

Hey dude - it's not cool to post people's e-mail addresses on USENET. I know from experience that spammers search for these nuggets to find new targets.

My work address gets NO SPAM because I keep it private. I get real pissed if this changed. (like yesterday).