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Could I have a Tail Stock Alignment issue

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Forum topic by jeff posted 11-05-2019 07:12 AM 390 views 0 times favorited 12 replies Add to Favorites Watch
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jeff

1174 posts in 4000 days


11-05-2019 07:12 AM

Recently turned some pepper mills. I have been following the video from Craft USA Supplies. The work piece is turned between centers to round,tenons are formed,the mill head and body are measured and parted off accordingly. My issue is once the mill body and mill head are mounted(using a waste block attached to my Nova G3 for final shape) and I move up my tail stock up to support the work piece the tail stock revolving center will not align with the mill head where it has been drilled. Once you snug up the tail stock and revolving center and tighten it down it moves the mill body and mill head. It actually makes my turned work piece out of round again. IS THIS NORMAL?. Head stock and tail stock centers align perfectly when checked. It seems once the tail stock moves away from the head stock it moves out of alignment. Wood lathe is a Grizzly 0658 12×20 bench top. Its a long post sorry :) Thanks.

-- Jeff,Tucson,Az.


12 replies so far

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Wildwood

2756 posts in 2670 days


#1 posted 11-05-2019 10:57 AM

Think the problem is the waste block (jam chuck) and not your lathe. The mill end is not seated on the jam chuck squarely! Need to make adjustment there so blank fits square!

https://www.youtube.com/watch?v=ikQCc5JD0wk

-- Bill

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jeff

1174 posts in 4000 days


#2 posted 11-05-2019 10:06 PM

Thanks Bill,
Pretty sure the mill body is seated squarely on the waste block.I do take time with that portion. I’ve never had to move the tail stock out that far on the lathe bed. I am using an adapter for my Nova G3 since my head stock spindle is 1×8. There could be run out on the adapter?. Head stock bearings are solid and smooth.

-- Jeff,Tucson,Az.

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MrUnix

7499 posts in 2734 days


#3 posted 11-05-2019 10:49 PM

Head stock and tail stock centers align perfectly when checked.

If you verified they align perfectly, then the only other cause has to be the way you are mounting the pieces after you part them off – unless there is some damage to the tailstock or bed rails, which would probably be obvious. Your description is kind of hard to imagine… do you have any pictures? Not sure why you would be using a waste block -and- tennons… shouldn’t it be either/or?

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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jeff

1174 posts in 4000 days


#4 posted 11-06-2019 04:50 AM

Thanks Brad. Definitely following the video correctly. Its possible I’m doing something wrong. The lathe was new in 2013. I will post some pics this week.
Thanks

-- Jeff,Tucson,Az.

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Wildwood

2756 posts in 2670 days


#5 posted 11-06-2019 10:50 AM

My chucks have thread adapters too, if they are not fully seated or messed up would see run out as lathe spins with nothing in them. I don’t see that.

I make sure when seating a jam chuck into a chuck make sure shoulder seated squarely in the jaws securely. I use a parting tool to insure those shoulders are square. Making sure tenons do not have any high spots. If using a recess with a parting tool it sits squarely in the jaws. Will test by running the lathe without anything mounted in/on the jam chuck.

Trying to remove high spots on a tenon have sometimes turned it slightly under size, merely take a wet paper towel to get a snug fit.

I have had to loosen jaws of chuck with with blank installed on jam chuck bringing tailstock up to get blank into alignment then tighten jaw & tailstock too!

At one time thread adapters sold by Wood Craft (their brand) no NOVA’S gave turners fits but think that problem resolved due too complaints.

-- Bill

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jeff

1174 posts in 4000 days


#6 posted 11-06-2019 03:25 PM

Thanks Bill. Shoulder tenons are for sure square. The adapter is by Nova. I will post some pics later on this week.

-- Jeff,Tucson,Az.

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Nubsnstubs

1625 posts in 2265 days


#7 posted 11-06-2019 04:34 PM

Jeff, I made a mandrel to eliminate the issue you are having now. If you would like to meetup somewhere, I will loan it to you with some instructions in using it . Pm me with your phone number. If not interested, let me know also.

........... Jerry (in Tucson)

-- Jerry (in Tucson) www.woodturnerstools.com

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Andybb

2149 posts in 1139 days


#8 posted 11-07-2019 01:07 AM

Can’t you loosen the chuck a little and put the tails stock point in the hole then tighten the chuck again?? Or am I missing something?

-- Andy - Seattle USA

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Wildwood

2756 posts in 2670 days


#9 posted 11-07-2019 03:14 PM

Have watched the video and read the instructions and just don’t have an answer for the OP! Still don’t think lathe is the problem, but can never really know for sure.

https://www.woodturnerscatalog.com/docs/deluxe_peppermill.pdf

-- Bill

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jeff

1174 posts in 4000 days


#10 posted 11-09-2019 06:32 AM

Some pics of the tailstock lined up with the mill head which is attached to the mill body with mill body attached to waste block…


Thanks Andy,not sure if your suppose to do that because the waste block should be seated squarely in the chuck.
Jerry thanks.I have one more to turn and if it happens again I will PM you.

-- Jeff,Tucson,Az.

View Lee's profile

Lee

139 posts in 1413 days


#11 posted 11-09-2019 08:46 PM

Yep, Andy’s right, the jam chuck isnt quite square, moving it in the jaws slightly is OK, remember you cut it by hand not with a precision metal lathe, lol ,and I wouldnt tighten that 60* cone too tight, it will crack that small end, dont ask me how I know that, Ha Ha

-- Colombia Custom Woodworking

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jeff

1174 posts in 4000 days


#12 posted 11-10-2019 12:52 AM

Hey Lee thanks.Andy I will try that on my next pepper mill.

-- Jeff,Tucson,Az.

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