(AD FREE) I Might Have Invented Something New...
Added 2023-07-06 13:07:01 +0000 UTCSaving the best for last on this one. In the final installment of the rotary fixture build that got way out of hand I'm taking on a design that well... to be honest, I have no idea will work ๐ But there's only on way to find out!
Enjoy!
Comments
I'll try to remember to show a little more detail on that next time I use it since you're not the first to ask. It's completely unmarked so I have no idea what brand it is or where it came from haha
Brandon Sander
2023-07-09 03:02:00 +0000 UTC๐
Brandon Sander
2023-07-09 03:00:41 +0000 UTCThanks Erik! There's been an absolute flood of comments over there so I have't caught up yet ๐
Brandon Sander
2023-07-09 03:00:28 +0000 UTCI noticed your push fixture for the bandsaw. Is that something you can share in the design?
Warren Turner
2023-07-09 02:59:33 +0000 UTCRedundant comment as I made one on youtube, but what an awesome idea. I trully commend your work, Brandon. Can't wait to see what's next.
Erik D. Radzius
2023-07-07 18:52:18 +0000 UTCโShweetโ indeed, and those copious chamfers ๐
James Riordan
2023-07-07 17:48:58 +0000 UTCNevermind, I did it again, thinking it was at 90 degrees to how it's actually used.
Michael Faragher
2023-07-07 12:22:36 +0000 UTCYou're right, it would begin requiring really tight tolerances, and hardened/ground surfaces in order to maintain them.......rrrrr fix one problem, and cause two more! BTW, your mini pallet build has inspired me to make one of my own. It will be 6"x12"( as I had a chunk of C1119 steel so sized, lying around ), and follow your basic design.
Jeff Loffert
2023-07-07 03:22:44 +0000 UTCSo, the bottom is milled to shape and there's nothing to do about that (shy insane setups). What if you either drove pins in the solid ends to index on the top edge of the slot, built indexers that screw into the existing slot on the bar, or machined end caps that screwed on to provide reference surfaces on the bar? I know it's poorly described, but you have precision locations, and are really only looking to resist minor torque when tightening.
Michael Faragher
2023-07-06 22:11:56 +0000 UTCThanks PJ ๐ I'm trying to wrap my head around your suggestion. What's an RC fit channel?
Brandon Sander
2023-07-06 20:46:39 +0000 UTC๐ The brain is usually a good thing to listen to! This for sure could be used for that. When I was doing my research I saw a video of a guy using a similar fixture to cut a full round tapered pin on the mill but just setting the rotary fixture at an angle. I think the sky is the limit with this thing!
Brandon Sander
2023-07-06 20:43:04 +0000 UTCThanks! That was my first thought as well, only trouble is the thicker I make them the more real estate they take away for the hold down clamps. I realized I don't really need those bars to be slotted so maybe just a counterbored hole would suffice
Brandon Sander
2023-07-06 20:40:46 +0000 UTCThanks Jeff! I was thinking of some way to do that. Maybe running the bolt long enough so that it pushes against the bottom of the slot lifting the dovetail nut up against the sides. Would be another case of nailing the distances exactly I think though
Brandon Sander
2023-07-06 20:39:16 +0000 UTCSo I am learning ๐ Thanks!
Brandon Sander
2023-07-06 20:36:27 +0000 UTCHey... I made fancy brass washers ๐ Thanks!
Brandon Sander
2023-07-06 20:32:59 +0000 UTCHmmโฆ an allen key boltโฆ in blackโฆ Developed an allergy for fancy brass knobs ? ๐ซฃ.. just kiddingโฆ nice ๐๐ป
Nikolaas Noyez
2023-07-06 19:16:25 +0000 UTCThe holders could be widened to out more meat on the sides. That could minimize deflection. I also thought about Turcite also on the holder bottoms that could be scraped for level and help with friction. Always learning! That was a pleasing bulld.
Dennis Shubitowski
2023-07-06 16:41:40 +0000 UTCLooks great Brandon! Keep refining it. Perhaps make a new dovetail clamp that sits taller, so that when you tighten the clamping screw the the top bar "floats" above the table surface, and only registers on the top chamfers of the dovetail clamp? Does that description even make sense? Anyway, very nice work, and look forward to see what Mark II looks like.
Jeff Loffert
2023-07-06 16:24:15 +0000 UTCOnly comment i have on this is that you can never. and i mean never have too much coolant drenching a tool
Drokles21
2023-07-06 16:09:51 +0000 UTCI like it. I also wonder if a modified washer could do the same thing. If it had a U-shaped cross section, it could interface with the dovetail or the . . . dovetail carrier? I don't know what to call it, the part with the split that interfaces with the rail and nut. So long as it takes up the torsional force, it could make all the difference without adding any additional bulk. You'd lose some travel, but I don't think any solution would be compromise free. Edit: Never mind. Did a mock-up in CAD and there's not enough meat to do any of that in the way I intended. Maybe have the washer index on the shoulder of the dovetail rider?
Michael Faragher
2023-07-06 15:52:31 +0000 UTCI cannot begin to tell you how much I love that design. The use of a round nut to expand into a dovetail? Beautiful. It also occurs to me that, within certain limits, you could also use this to generate rounded internal pockets. Don't know how useful that would be, but the brain said it, and seems pretty sure, so I figured I'd share.
Michael Faragher
2023-07-06 15:48:40 +0000 UTCNoice Brandon! Cracked me up! Great concept and execution. Perhaps the addition of a small hardened pin at 90ยฐ pressed in the flex dovetail and with a small RC fit channel to maintain the squareness at any point in the slot. Dovetails are inherently difficult to nail perfectly but great for locking down in general. Thanks for another great video! ~PJ
PJ
2023-07-06 14:30:37 +0000 UTC
