my clamp does hold quite tight with little pressure due to the large
surface area clamping, you would have to really be doing some hard cutting
vibration for it to move. and as you say lots of pressure will move the
large gear slightly but as i said one each side seems to stop that. but
really how hard do you need to clamp it
I have had no trouble with movment or slip and with just light clamping
Bill
----- Original Message -----
From: Tim Krause
To: legacy-ornamental-mills@googlegroups.com
Sent: Monday, May 02, 2011 1:12 AM
Subject: Re: Looking for a Means of Locking the Rotary Table to make
straight cuts
Curt's does not address the backlash in the gears but Bill's is right on.
It's a low profile clamp that prevents the large gear from turning. I
think the same thing can be done on the left side of the rotary table
using the stock holes in the rotary table. It would hang over the edge of
the rotary table and I would put the clamp in the back left corner and
pivot in the front left corner.
Bill, will it really slip with all of that surface area? Would a strip of
cork, rubber or sandpaper add to the grip?
One problem I had with my cam version I was working on was finding a
suitable material that would grip the gear side and not harm the gear or
wear out too quickly. I had started with UHMW and it was too soft and
slick. Plus mine had a small surface area and I couldn't decide where to
mount it so I did nothing. I don't remember if I shared this photo with
the group or talked about the idea on the list or not. Here's a photo.
It could have been on the left rear corner as well.
The only thing that I don't like about the whole idea is the side ways
pressure that is being put on the gear. It might cause things to go out of
alignment when activated. That's why I was thinking of a downward pinching
grip.
Oh, I also see a vise grip on the left side of the table will work too.
Faster than the c-clamp :-). Place a spacer under the large gear so it
wont compress when you close the vice grip.
Finally, at the risk of offending people, magnets seem goofy no matter how
they are used. Unless you are using an electromagnet that really grips
things I would think the rare earth ones would fail. I know it's easy to
slide the magnets but difficult to pull apart and that is the exact motion
we are trying to prevent.
It's really nice to see this topic move forward with some action!
-Tim
----- Original Message -----
From: "begatbrown" <darylmichaelsc...@gmail.com>
To: "Legacy Ornamental Mills" <legacy-ornamental-mills@googlegroups.com>
Sent: Sunday, May 01, 2011 4:43 AM
Subject: Re: Looking for a Means of Locking the Rotary Table to make
straight cuts
Hello All,
Curt's solution of using attaching a fixture to the headstock then
utilizing the index wheel seems workable. As does Bill's table-
locking jig, though as he points out it would need modification for a
table not made for the Revo.
Begat
On May 1, 1:15 am, "Bill Bulkeley" <bulke...@mmnet.com.au> wrote:
> I know my rotary table is different than all you guys its off the revo
> and
> made wider to fit my 900,
> but similar could be done on the 900 rotary table i'm sure
> anyway this is what I use for a brake it took me about 10 min to make
> if I really what to hold things tight I put one on the other side as
> well
> Bill
> ----- Original Message -----
> From: "curt george" <curtgeo...@wowway.com>
> To: <legacy-ornamental-mills@googlegroups.com>
> Sent: Sunday, May 01, 2011 7:25 AM
> Subject: Re: Looking for a Means of Locking the Rotary Table to make
> straight cuts
>http://www.rockler.com/product.cfm?page=19597&filter=destayco%20clamps
> Hello Tim
> Ive bought these before, thay are under 3/4" tall. I belive that thay
> would
> sit just below or at the same level as the top of the table?
> If not a key lach lock that could engauge the teeth of the gear would be
> a
> much smaller profile. or a cam lock may also work.
> Just playing around with some ideas.
> I can wait to see your new turn table!
> talk to you more latter.
> C.A.G.
> ----- Original Message -----
> From: "Tim Krause" <artmarb...@comcast.net>
> To: <legacy-ornamental-mills@googlegroups.com>
> Sent: Saturday, April 30, 2011 5:02 PM
> Subject: Re: Looking for a Means of Locking the Rotary Table to make
> straight cuts
> I think any Destaco clamp would sit too high and interfere with the
> router
> carriage, IMHO. That's why I've been looking for a really low profile
> solution. Feel free to prove me wrong :-).
> -Tim
> ----- Original Message -----
> From: "curt george" <curtgeo...@wowway.com>
> To: <legacy-ornamental-mills@googlegroups.com>
> Sent: Saturday, April 30, 2011 1:56 PM
> Subject: Re: Looking for a Means of Locking the Rotary Table to make
> straight cuts
> Hello Everyone!
> Just got home.
> I like the idea of locking the table onto the main spindle shaft. I find
> that it makes everything much easer, the spindle or Indexing pin then
> can be
> used to lock the table at any degree. And Mike's indexing gears concept
> also
> comes into play with this method of controlling your table.
> As far as a locking tool for the table? could you just use a small
> DeStayCo
> push clamp with a rubber tip, Having the tip so that is can engage with
> the
> large gear? that would lock your table in any locked position that you
> may
> want.
> Its just an idea. I have not tried it, up I believe it should work.
> have to run.
> Good luck.
> C.A.G.
> ----- Original Message -----
> From: "Tim Krause" <artmarb...@comcast.net>
> To: <legacy-ornamental-mills@googlegroups.com>
> Sent: Saturday, April 30, 2011 4:25 PM
> Subject: Re: Looking for a Means of Locking the Rotary Table to make
> straight cuts
> All I can say is stay tuned. I'm working on a rotary table mod right now
> and I'm going to make a lock and see if it works. It would be a simple
> screw, one hole and a couple pieces of steel or aluminum.
> -Tim
> ----- Original Message -----
> From: "begatbrown" <darylmichaelsc...@gmail.com>
> To: "Legacy Ornamental Mills" <legacy-ornamental-mills@googlegroups.com>
> Sent: Saturday, April 30, 2011 11:06 AM
> Subject: Re: Looking for a Means of Locking the Rotary Table to make
> straight cuts
> Hello JWB and Tim,
> Thanks, I was able to get away without drilling holes! I have two
> strong (really strong) magnets and they were able pin in the small
> gear on either side. The small gear is the more important gear to
> attack. If you can hold its teeth still, then it locks its teeth into
> those on the larger gear. It also has the benefit of immobilizing the
> handle.
> Tim, I can see why you didn't create a device to lock down the small
> gear because it would be hard to get to. But if you could create a
> clamp that is screwed into the table and folds down on top of the
> small gear and meshes with its teeth, then it would truly stop all
> movement.
> It would also be a smaller device with the need for fewer teeth.
> Begat.
> On Apr 30, 12:57 pm, "Tim Krause" <artmarb...@comcast.net> wrote:
> > Begat,
> > First you might want to look into why your rotary table is so loose.
> Tightening the four mounting screws and adding shims might tighten the
> table
> up.
> > Locking the table is something we have talked about but never really
> > found
> a solution. One thing that prevents the table from moving is hooking it
> up
> to the main spindle. With the gears engaged it will only move the amount
> of
> the backlash in the rotary table gears.
> > Another simple idea that came up in the past is to use a "C" clamp
> > between
> the waste board and the base to hold it in place. simple, cheap but may
> not
> be fast enough for you.
> > Using a pin to lock the table in place with the aid of the large gear
> teeth gives you 2.25� increments. So you can index 1, 2, 4, 5, 8, 10,
> 16,
> 20, 32, 40, 80, and 160 places. That might be too limiting. Is this what
> you
> where thinking or do you have the guts to actually drill index holes in
> your
> rotary table in the right place?
> > I've been working on a clamping idea for way too long that just grabs
> > the
> edge of the large gear but with my degree wheel that only leaves a small
> portion of the teeth to grab. This could be adequate but I have not
> tried it
> yet. I wanted something that would stay in place and is lever operated
> for
> fast on and off response. It also needs to be low profile in my opinion.
> > On this same path, I came up with a way to mount index wheels on the
> bottom of the table and use a spring loaded pin to index the table. I
> have
> not decided how easy it was going to be to use so I've not taken it any
> further than thinking. Along with that idea comes a way to disengage the
> small gear from the table so it can be freely rotated quickly for the
> next
> index.
> > Index plates added to the rotary table is not a new idea. I made a
> > custom
> index plate for one of our members that had a boat load of holes. Here's
> a
> photo.
> > He made his own version of the rotary table that exceeded the cost of
> legacy's but the design is more flexible and easier to use. The table
> can be
> used in a freely spinning mode or driven by a gear. He made a custom
> spring
> loaded arm that allowed him to index specific locations. The idea was to
> avoid counting and just move to the next hole. The increments got
> smaller as
> you moved inward.
> > Here's his adjustable arm.
> > It's a real piece of art what he came up with.
> > I hope this helps in some way to get you thinking. I think it's a
> > great
> topic to expand on.
> > -Tim
> > -----
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