Nova pen jaws...big disappointment - Page 2 - International Association of Penturners
     International Association of Penturners
Pens for Service Members
 
Support The IAP

Go Back   International Association of Penturners > Community Forums > Shops, Jigs, Fixtures & Tools
  Forgot Password
Register FAQ Members List Search Today's Posts Mark Forums Read
Shops, Jigs, Fixtures & Tools Show off and discuss your workshop and everything in it.


Logged on members can hide ads!

Welcome to penturners.org!

You've found the home of The International Association of Penturners. You are currently viewing our site as a guest, which gives you limited access to view discussions, photos, and library articles.

Consider joining our community today. You'll have full access to all of our content, be able to enter our contests, find local chapters near you, and post your questions and share your experience with our members all over the world.

Membership is completely free!!

If you have any problems with the registration process or your account login, please contact us.

Reply
 
LinkBack Thread Tools Display Modes
Old 08-22-2017, 03:33 AM   #11 (permalink)
 
Join Date: Feb 2017
Location: Nebraska
Posts: 18
Photos: 0

Default

Quote:
Originally Posted by Dale Allen View Post
Thanks all.
I filled out an Teknatool online form and got an email today.
They are going to take care of this.
A fine company to work with.

Dale
Maybe they have worked on their customer service.

When I got my lathe from them, I noticed the massive spindle wobble/runout as soon as I turned it on, also, the faceplate would not even screw on due the the poor machining of the spindle. It was that bad. I filled out the online ticket and waited two weeks with no response. So I called their customer service and they told me that they would not warranty anything that was not electrical on the late. After questioning this for about 15 minutes and being repeatedly told that there was nothing that they could do, I finally was transferred to someone higher up. He finally told me that it was a misunderstanding and that they do in fact warranty everything and would take care of it.

I had the option of dismantling the lathe and sending the headstock in, or them shipping me the parts to fix it myself. I opted to fix it myself. However they sent me a severely used spindle that was so gouged and marred that I had to clean it up with emery cloth to just get the new bearings to slide on. I had to use that spindle because when I emailed them pictures of the spindle, the only response was "I don't know why we would have sent you a used spindle." That was the last email I got from them. So, after repeated emails to them went unanswered asking for a new spindle for my brand new lathe, I gave up and put on the beat up spindle.

The lathe I was sent had also been recalled due to the forward/reverse switch being wired incorrectly. They remedied this by sending me a sticker with the forward/reverse labeling switched around.

I didn't even bother asking about the tailstock being machined so far off, with the way the handled the spindle, I figured they would just send me a "new' one that was rusted up and looked like it fell off a truck.

Hopefully they have fixed their customer service problems. But it is too little too late for me, they have lost a customer here for sure.
aj r is offline   Reply With Quote Top
Old 08-23-2017, 10:57 PM   #12 (permalink)
 
Marmotjr's Avatar
 
Join Date: Jun 2016
Location: Rome, Ohio
Posts: 231
Photos: 0

Default

Quote:
Originally Posted by rd_ab_penman View Post
No problems with these.

Les
I have a love/hate relationship with those. They're my goto pen blank chuck, but I usually expect a failure somewhere. Either It wobbles it self loose, or the blank just doesn't sit right or something goes wrong with it. But that's my expectations. I probably had a bad run of not being aggressive enough early on when I was new, and I never tightened it down enough, nor mounted the blank correctly. So now, in the back of my mind, I'm always expecting a failure. But I think I haven't had any problems with them recently.

The only real 'issue' I have with those is that if I have to mount the blank offset a bit from the base of the chuck for some reason, the blank will tend to settle down onto the chuck base when drilling. I know, it's obvious, but I always forget to check, and then I can't figure out why my planned drill depth is off. But once I account for it, it's fine.

So I guess I have a love/hate relationship with my brain more than that chuck.
__________________
The only true way to get a correct response on the internet, is to post an incorrect one yourself. Hence why I post a lot.
Marmotjr is offline   Reply With Quote Top
Old 08-24-2017, 07:33 AM   #13 (permalink)
 
Woodchipper's Avatar
 
Join Date: Mar 2017
Location: Cleveland, TN
Posts: 912
Photos: 1

Default

I have used the pen jaws before an didn't notice any gaps or problems of any kind. I have the Cole jaws- need to finish my pens and check them out.
__________________
One good turn deserves another.
Woodchipper is offline   Reply With Quote Top
Advertisement
Old 08-25-2017, 05:41 PM   #14 (permalink)
 
Join Date: Oct 2012
Location: Akron, OH
Posts: 1,040
Photos: 0

Default

Well, new jaws and same problem

The same problem exists in that the jaw clamps onto the stock at the inner end but the outer end is not clamped.
It seems to me that the problem may be the jaw slides. I get a .057 movement at the end of the jaw when it is NOT clamped.
So, that leads me to think that the slides are too loose(wobbly) within the slide track.
When the jaws are clamped they may be tilting the jaw beyond the 90 degree mark from the chuck body.
I checked the retainer clip on the scroll plate and it is in position and the chuck adjusts normally with no binding. Also, there has not been any abuse of the chuck and there is no reason to suspect the slides can wear that much with regular use.


Could I impose on one or more who have this G3 chuck and see how much wobble you have in the slides?
I see this problem has plagued many for more than a year as I was reviewing some old IAP threads about it.
Short of buying a new chuck body, my next step may be to shim the outer screw to make them sit correctly. That would be far easier than trying to mill out the centers.

Thank all for any help.

Dale
__________________

Dale Allen is offline   Reply With Quote Top
Old 08-25-2017, 08:06 PM   #15 (permalink)
 
Marmotjr's Avatar
 
Join Date: Jun 2016
Location: Rome, Ohio
Posts: 231
Photos: 0

Default

A few months ago, I believe there was a very in depth thread on this. I think some people reported getting multiple sets of replacement jaws before they found one that worked. Check that thread for more details.

But my Nova jaws do wobble a bit, but when tightened down, there is no wobble. I cannot speak for the jaws as I do not have those.
__________________
The only true way to get a correct response on the internet, is to post an incorrect one yourself. Hence why I post a lot.
Likes: (1)
Marmotjr is offline   Reply With Quote Top
Old 08-25-2017, 09:11 PM   #16 (permalink)
 
Join Date: Oct 2012
Location: Akron, OH
Posts: 1,040
Photos: 0

Default

Well, the jaw slides have to have some wobble, otherwise they would not slide in the channel. If that was not factored into the design of the jaws, them it stands to reason that they would be off from 90 degrees of the chuck body when pressure is applied.
If using dovetail jaws or cole jaws that difference would never be noticed.
On these and my pin jaws, it is a factor.
I had some brass shim washers from a router bit set that I put under the outside screws. It is a marked improvement but could be just a bit thicker.
I plan to measure them tomorrow and see if I can find some shim stock to use. Preferably stainless steel.
__________________

Dale Allen is offline   Reply With Quote Top
Old 08-25-2017, 09:46 PM   #17 (permalink)
 
Join Date: Oct 2012
Location: Akron, OH
Posts: 1,040
Photos: 0

Default

Thad; I have read up on many of those old threads. On thing I found interesting is that Warren White even got a new chuck body and it still had the same problem. What I'd like to see is someone from Nova address this issue with action other then sending out parts. With so many cases there has to be a reason and it seems to be the wobble in the slides. The scroll plate cannot be tight enough to keep the slides from wobbling or it would not rotate. Both sets of jaws I have sit perfectly aligned when they are sitting on a flat surface and not mounted. And, they come together perfectly with no pressure on them. When I run them together I can see about a 1/16" gap that is consistent all the way along the length. When I press the ends together they touch at the ends but not at the base. When I pull them apart the opposite is apparent.
One other thing to note is that the inside screw head obstructs the lower part on the channel so you should not try to mount something all the way into the jaws. I have put marks on mine that are about 1/2" out from the chuck body and that seems to work best.
But, even with the shims I cannot get a straight machined 7/16" rod to rotate evenly about the center.
__________________

Likes: (1)
Dale Allen is offline   Reply With Quote Top
Old 08-26-2017, 12:04 PM   #18 (permalink)
 
Join Date: Oct 2012
Location: Akron, OH
Posts: 1,040
Photos: 0

Default

OK, so this issue is apparently just my bad luck.
I checked a new G3 at Hartville hardware and there is practically no noticeable wobble in the slides. Not sure how long these are supposed to last but mine is 4 years old and it does not get used every day.
I may look around and see if I can get just the chuck body.
__________________

Likes: (1)
Dale Allen is offline   Reply With Quote Top
Old 09-06-2017, 10:01 PM   #19 (permalink)
 
Join Date: Oct 2012
Location: Akron, OH
Posts: 1,040
Photos: 0

Default Update.......

Another email discussion with the folks at Teknatool and I find out there was an issue with some of the chuck bodies not being machined correctly.
This error apparently resulted in the slides being too wobbly in the channels and that causes the jaws to move as well. I explained to them that I could see a .020" movement side-to-side on each of the pen plus jaws with no pressure on the chuck.
So, they sent me a new G3 chuck.
I first put the pen jaws on the new body and I could hardly detect any wobble...that's a real good sign!
I installed the chuck on the lathe and again it was difficult to detect any movement. I set my dial indicator on it and, with some force, I could move it .005". Now we're talkin!
I tried several round blanks and a straight piece of tubing and in nearly every case the stock turned centered, within the .002" runout I have on the headstock.
So, I'm real pleased with this chuck now.
However, it still bothers me that such an issue was not corrected before the product got to the customers.
And, I think Nova is missing an opportunity to sell more chucks.
At one point during this issue I was tempted to buy another G3 just to see if that solved the problem. However, you cannot buy the chuck body alone. If I wanted another one or say I wanted a second one as a spare or to keep different jaws on it, I would have to buy one with the same 2" dovetail jaws. I don't need another set of 2" jaws. Why not allow the customer to buy the chuck body and then be able to buy whatever jaw set is needed?
__________________

Dale Allen is offline   Reply With Quote Top
Old 09-06-2017, 11:32 PM   #20 (permalink)
 
Join Date: Mar 2016
Location: Marietta, GA
Posts: 649
Photos: 58

Default

Woodcraft has the G3 chuck on sale for $150 which has the 50mm jaws, the mini cole jaws, the 35mm jaws, and the small pen jaws (not the pen plus jaws).

It is normally $300.
eharri446 is offline   Reply With Quote Top
Related Content
Logged on members can hide ads
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 11:45 PM.

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

Content Copyright © 2003-2016 by Penturners.org, LLC; All Rights Reserved
Terms Of Service   Acceptable Use Policy