planitary substitute for logitudinal rose engine

[oreos40]

Hello group! I am new to this forum but not to turning. I have worked for and with my father in his shop for 45 plus years. He specialized in large turnings and stuff that others had said was not possible. He retired due to a stroke six years ago and passed away this spring at 91 years young. Years ago we did some restoration turnings that were about 8 inches square and 30 inches long. There was a tulip section that was for lack of a better word a barly twist as well. These were a challenge at the time but some bits here and there came together and we made it work. the total order was about 40 pieces, which made it worthwhile to make the modifications. These mods were job specific and were shelved after the run.

Here is what I am looking to do:

I would like to construct a planetary set with a 1:1 ratio between the input shaft and the output shaft. The input would be the main drive off the headstock. the output would be attached to the yolk of the planetary set. The outside ring would be synchronized with the longitudinal movement of the carriage. BUT I would like to use cog belts and pulleys instead to help keep the weight down, remove the potential for damage to the gear train from intermittent cuts and keep oil and lubes out of the equation.

Why I would like to get this to work. one reason:

First I realize there are machines for doing spirals where the longitudinal feed and the head are coupled by cable or chain and the ratios can be modified with change gears or pulleys. That is the way we did the barley twists in the past. The shell could be held fast and the turning portion completed prior to ornamentation then the shell could be coupled with the carriage and barly twists or other details could be applied. To this point I am sure there are some nods of bordom because there is no need for the apparatus I am talking about to this point right? Where this Mod would be advantageous I believe is coupling it with a pumping cross feed for long rose engine work on an extreme scale. Doing a repetitive rotating pattern such as a basket weave without having to stop and index the part each time. Feed in to the proper cutting depth. Dial out. move to the next location. dial in to the correct depth and repeat until complete. coupled with a duplicationg template setup the design could be easily transferred to shapes on the fly.

[QC Inspector]

Welcome to the forum.

I follow most of what you said and why you want it. :oo: :rolleyes: Are you thinking of making it as an attachment for existing lathes or is it going to be a scratch built machine.

Pete

[oreos40]

The base machine will be scratch built. A lathe bed 20' long overall. The bed rails ara not horizontal but inclined at 45 degrees. The head and tail-stock can be adjusted on a cross piece to allow for larger throw. I turn with a mechanical cross slide now following a template in the rear this would move to the front. Thank you for your reply and interest!
For long turnings i the past we would bolt the tail-stock to a stand outboard and turn half at a time and flip the blank. The bed for this lathe is built with two 10" wide flange "I" beams and includes a third set of legs in the middle for rigidity.

If it will help I have some videos on you tube turning items on a converted atlas 10". It shows the template arrangement and some other modifications. we had four of these lathes. I kept two. The "big lathe" was an ancient 14 foot bed with a timken bearing headstock that we could get 11 1/2 feet between centers.

The videos are under oreos40

[wheelinround]

Here's Rogers Links (http://www.youtube.com/user/oreos40?feature=results_main)

One of his videos using the copy system and metal lathe type set up.

epee guard good shot of the template use - YouTube

[wheelinround]

Roger I have checked out your video's there doesn't seem to be many showing what your working with. Plenty of other peoples videos tho.:?

[oreos40]

what I am working with?; a mechanical aptitude and a background in wood working specifically turnings. a parallel background in metal and equipment fabrication and design. A desire to broaden the scope of my ability and enjoy the challenges.

The equipment? a full wood working and metal working set of equipment and a shop. Lathes, mills , saws, welders, torches, autocad, solidworks.

material? wood,metal, composites,....

a sound mind? depends on who you ask!

Thanks for posting a link to the vids I haven't figured out how to do that yet.

I have done production turning. orders varied from 1 or two duplicated repair parts thru annual orders of 3500 to 4500 parts a year. The one lathe in the video was responsible for 5 million bait casting bobers turned one at a time! I enjoy unique challenges. We (dad and I) have done some simple OT stuff with the rope turnings and fluting and I would like to take it a step, or two or three further.

The lathe in the videos is a pre ww2 Atlas 10" metal lathe. It is belted to run about 2600 rpm. I can turn peices up to 5" in diameter over the saddle. The cross feed has been refitted with a lever in place of the screw. The timkin bearing headstock has been fitted with a rolling grip clutch so it can be instantly stopped with out turning off the motor. It has a 1" -8 thread and a taper for standard taper tooling. The tails stock has been modified to lever action. The motor is 1 hp 3450 rpm. I would be happy to answer any other questions about it I don't consider any of it a secret. I do know that there is not another lathe like it and people have tried to copy it. If you have a desire I would be happy to help any way I can. This however is not the lathe I am planning to use as a foundation for ornamental turning. That lathe will be built from the bottom up. The planitary will be a spindle mounted addon because eventually I hope to build an oval chuck for this lathe as well. The head will rotate for outboard turning and a portable bed placed to configure it as a "T" lathe.

[oreos40]

Roger I have checked out your video's there doesn't seem to be many showing what your working with. Plenty of other peoples videos tho.:?
anything I posted is my equipment. same lathe two locations.

https://www.facebook.com/photo.php?fbid=4252245154949&set=a.4252245114948.2166950.1550386447&type=1&relevant_count=1

[wheelinround]

if I posted it it is my equipment not other peoples. same lathe two locations.


Roger I only see maybe 3 or 4 videos you have posted but a number from other people sites.

Maybe a photo of your lathe would help.

As I said in my e-mail contact Tom Cattell through the OTGA web link I also emailed. He has the green machine bottom left of this link (http://www.otga.org.au/GalleryEquip1.htm).

[oreos40]

How do I post a photo? I've tried a couple ways and they don't show up.
my question is not about the lathe.
I am looking for a way to alter the registration of the head while under way. I can do this with a planetary set up but i want to use belts instead of direct meshing gears. along the lines of several oval chuck designs. I don't believe these designs will "clock" as the housing is turned though.
here is a picture of my dad and the big lathe.
http://www.woodworkforums.com/attachment.php?attachmentid=216520&stc=1&d=1342846994

[wheelinround]

http://www.woodworkforums.com/f36/posting-pictures-your-post-78760/

[oreos40]

Thanks! that was easy!

[wheelinround]

Nice bit of gear there Roger.

Seems someones doing it although I suspect this has been done mass production style with CNC

http://www.osbornewood.com/img/hiRes/1774.jpg

[oreos40]

I am sure there are several who can do this in one way or another. We did columns like this but sent them to a carver Konstantinos Papadakis to finish I believe these have been done in the same fashion.

"I do know that there is not another lathe like it and people have tried to copy it"
Was concerning the atlas setup.

[oreos40]

wheelin', I have have not received an email.

[wheelinround]

Just resent email maybe check it didnt not go into spam folder.

[oreos40]

no further enlightenment, opinions? I know someone who has read this has some knowledge concerning this.