The Shop > Tools
The Eddgwick arrived!
mattinker:
The Edgwick has a built in head stock, so no removing it! It also has a movable gap bed piece that would need to be ground too. The head-stock is more than solid enough, but would in my view be too cumbersome. The carriage that is evolving in my head would have four skateboard bearings arranged to sit on the "V". The top of the carriage ways are unworn in the horizontal plane on which a Teflon pad could maintain the height. The whole thing could be held down using the tail-stock clamping way with bearings and springs to apply pressure to the grind stone. It seems to me to be better to use a spring than some kind of solid slide, as the wheel can then lift until it's sparked out. Grinding is not like milling. It would be nice to be able to use the cariage feed to move the grinding caridge!
Steve, Any grinding would be in preparation for a final scrape to get things back into line.
Thanks Hanermo, I think it would be quite a lot of work to mount linear rails, not worth the effort and I don't have them in stock! I like the moral of the story!
Regards, Matthew
vtsteam:
Well that sounds like a plan for the ways grinding. :dremel:
And presumably the tailstock would remain at the same height it is now, since you wouldn't grind the part of the ways it rides on? And the headstock as well, so no need for Turcite, unless there has been wear.
The only tricky part if you don't have one (or access to one) is using a straightedge for the scraping part.
whatever grinding carriage you build can be driven by a nut slipped onto the leadscrew -- it doesn't even have to be a halfnut, if you can reverse the carriage back.
mattinker:
--- Quote from: vtsteam on June 16, 2015, 11:04:49 AM ---Well that sounds like a plan for the ways grinding. :dremel:
And presumably the tailstock would remain at the same height it is now, since you wouldn't grind the part of the ways it rides on? And the headstock as well, so no need for Turcite, unless there has been wear.
The only tricky part if you don't have one (or access to one) is using a straightedge for the scraping part.
whatever grinding carriage you build can be driven by a nut slipped onto the leadscrew -- it doesn't even have to be a halfnut, if you can reverse the carriage back.
--- End quote ---
I think it would be easy to drive the carriage. The tail-stock way would remain as is. The straight edge is another problem for another day!
Regards, Matthew
awemawson:
So Matthew, is the headstock and bed one casting? Quite unusual if it is, and it must have made planing and grinding the bed un-necessarily hard when the made them. Most head stock sit on the way, and many can be swivelled for alignment down the bed. Colchesters having a pivot peg at the rear and a pair of adjusters sitting between the shears to tweak it.
mattinker:
--- Quote from: awemawson on June 16, 2015, 11:27:51 AM ---So Matthew, is the headstock and bed one casting? Quite unusual if it is, and it must have made planing and grinding the bed un-necessarily hard when the made them. Most head stock sit on the way, and many can be swivelled for alignment down the bed. Colchesters having a pivot peg at the rear and a pair of adjusters sitting between the shears to tweak it.
--- End quote ---
Headstock and bed one casting! Removable gap.
Regards, Matthew
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version