Photos of rotary table build
Quote:
Originally Posted by
KBs PensNmore
Hi Bill,
Any chance of some pics of your Rotary Turntable from an Aldi Gym Weight, or did you do a WIP please ??
Kryn
G'day Kryn,
Have a look here ( I wanted to see if I could get a tool accepted in that forum)
Manual Rotary Table
Biggest learnings (these comments may make more sense after you look at the photos)
Make everything as close fitting and tight and square as possible - - basically you are holding a handle in your hand that is connected to a Mill Motor via the rotary table, workpiece and cutter, any sloppiness will result in vibration and will assist the mill motor to grab the workpiece and turntable out of your hand or it can make the main table wobble.
I ended up cutting a couple of radial holes from the outside of the table into the centre so that I could screw into the bearing grubscrew holes and really tighten on hard from the outside instead of using tiny little grubscrews from the inside.
Made a big washer to sit underneath the bearing because there was 0.001" end play and that was making things a bit juddery and grabby.
When doing things on round bits of metal its always handy to know where the centre of the circle is/was so its handy to scratch a couple of diameters or concentric arcs that will refer you back to the original centre if you ever need to know where it was - this not knowing the location of the centre was a particular nuisance when I cut the semi circle slot for the sharpening protractor and needed to modify it. This was also an oversight when making the main table.
I ended up cutting a couple of plugs for the centre hole of the bearing - one had a raised nipple and the other a centre drilled hole - great for quickly centering the jig under the mill and the nipple was handy for plugging into a small hole on the workpiece to get the workpiece cetred on the table prior to clamping it down.
Two handles within approx 30 degrees allow you to grip with thumb and fingers in a wide grip that makes it easier to control the movement rather than a single handle.
There are a few different plans out on the internet, I improvised with what I had and copied the broad principle of the thing. Harold Hall (of course) has a detailed plan for one on his website or in one of his books.
After I get the spur gears and worms working a bit better I'd like to make a proper rotary table with a metal wormscrew driving a 40 or a 90 tooth spur gear.
Seeya
Bill