I've done pumping on the legacy before, but was not satisfied with the amount of time it took to setup and make changes. It was all done on the rotary table, but could also work wrapping around a cylinder. The method used where cams cut on a cnc and added to the leadscrew. I used a spring setup that would quickly fatigue and fail during a long run. If I slowed the cut down it could have worked better.
To change the number of pumps on the piece I used a chain setup linking the leadscrew and spindle. Changing the sprockets changed the ratio, thus the number of pumps. This I similar to the method used by Pudsey Dawson (sp). What I learned is close to what you are describing. Running the cams on the backside of the machine on a keyed or square stock would be easier to swap out cams and prevent any slipping. I was in the process of determining the spring rate when I was forced to abandon the project. Also a method of variable swash plate is a great way to start. That way young can adjust the travel of the pump. This is helpful when start on the outside edge of a rotary project as you move into the center. Now I know pictures are worth a thousand words, but I'm not sure if I documented it because it was not ready for show at the time. The parts are buried in a storage unit some what like the last scene in "The Raiders of the Lost Ark" movie! As to what I wrote, I should really not write replies when waking up or going to bed. It is what it is! Tim On Dec 12, 2018, 5:22 AM, at 5:22 AM, 'joe biunno' via Legacy Ornamental Mills <legacy-ornamental-mills@googlegroups.com> wrote: >thanks to all for their comments, compliments, encouragement, etc. ... >Hey >Tim!... not sure if I am interpreting your comment correctly... what I >am >saying in my previous post, is that I do not intend to convert the >Legacy >into a rose engine machine... they certainly are two very different >pieces >of equipment, although, I might guess, you could put them in the same >classification of "ornamental milling equipment"... what I would like >to >attempt to achieve, as many in this group have thought about in the >past, >is to accessorize the Legacy to achieve "rose-engine like" cuts on >their >workpieces... a rose engine has far to many bells and whistles to think > >that they could be adapted onto a Legacy... but just a simplistic >pumping >action option would open up a new world of options for design on the >legacy, as the "wave" attachment has done... is it possible to do a >pump >action on a Legacy?... I believe it could be... can it be done on a >reasonable budget is the bigger question... let's face it, throw enough > >money at any project, it can be completed... I know a very well known, >ornamental turner(Harvey Fein) who told me whenever he came upon a >problem/challenge, he simply put enough zeros, on the end of what it >would >cost, to fix it!... LOL!... I certainly do not have the finances that >Harvey has, and as a matter of fact I might have to rob a bank to see >this >mod through!... or start a "go fund me" page!... LOL!... but I am going >to >try to do this as cheaply as possible(plastic rosette wheels, for >example, >not brass)… so, when you say a Legacy "should not" be a rose engine, >are >you referring to the idea that a simpler conversion is not attainable, >solely from a logistic stand point?, or that the attempt should not be > >made because the desired type of end work will not be doable?... thanks >for >taking the time to read this and my other ramblings, your opinion >matters >and is respected... Joe > > >>>>> > >-- >You received this message because you are subscribed to the Google >Groups "Legacy Ornamental Mills" group. >To unsubscribe from this group and stop receiving emails from it, send >an email to legacy-ornamental-mills+unsubscr...@googlegroups.com. >To post to this group, send email to >legacy-ornamental-mills@googlegroups.com. >Visit this group at >https://groups.google.com/group/legacy-ornamental-mills. >For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To unsubscribe from this group and stop receiving emails from it, send an email to legacy-ornamental-mills+unsubscr...@googlegroups.com. To post to this group, send email to legacy-ornamental-mills@googlegroups.com. Visit this group at https://groups.google.com/group/legacy-ornamental-mills. For more options, visit https://groups.google.com/d/optout.
