My Troyke CNC rotary table is actually working!

Its the "almost instantanious" part that you should be concerned about.

It might be nice and tight at the moment...but if you use it a lot...it wont be so tight in the future. Best do it right, and never worry about it in years to come.

Gunner

"A conservative who doesn't believe? in God simply doesn't pray; a godless liberal wants no one to pray. A conservative who doesn't like guns doesn't buy one; a liberal gun-hater wants to disarm us all. A gay conservative has sex his own way; a gay liberal requires us all to watch and accept his perversion and have it taught to children. A conservative who is offended by a radio show changes the station; an offended liberal wants it banned, prosecuted and persecuted." Bobby XD9

All good points.

You can be sure that I will not use it a lot.

The ramp (hump) on the side will look like this:

__.,----,.___

so the table will have plenty of room to stop.

Running fast into a home switch has many advantages, related to prevention of bouncing. I remember that homing too slowly, for my X axis, led to home switch bouncing and confusing EMC. I upped the homing rate and I am good now. I hope at one inch per second on all axes simultaneously.

top of RT ______________________ __________ \o ramp o/ \______/ RT table ________(o)_______________ --| |------- | home | | switch | side of RT body ------------

Aint' ASCII art fun?

Yep.

I had a great ASCII art collection but lost it accidentally.

I will do pretty much as you say with the ramp. i

Blink blink....blink....right.

"A conservative who doesn't believe? in God simply doesn't pray; a godless liberal wants no one to pray. A conservative who doesn't like guns doesn't buy one; a liberal gun-hater wants to disarm us all. A gay conservative has sex his own way; a gay liberal requires us all to watch and accept his perversion and have it taught to children. A conservative who is offended by a radio show changes the station; an offended liberal wants it banned, prosecuted and persecuted." Bobby XD9

What's that Lassie? You say that Pete C. fell down the old rec.crafts.metalworking mine and will die if we don't mount a rescue by Mon, 02 Aug 2010 11:01:51 -0500:

Another example: Milling a spiral groove, such as used in a scroll chuck.

that does not require a rotary table.

Ignoramus18921 fired this volley in news:9LidnRyx7tVY7MrRnZ2dnUVZ snipped-for-privacy@giganews.com:

Ig, to do it to the precision necessary (including surface finish) to be an acceptable scroll, it does.

Yes, you can program a scroll in G-code, but of all the things I can think of that require a good finish, chuck scrolls are right up there. Minor interpolation errors would create a "grabby" finish.

Scrolls are (were?) usually machined with mechanical devices, with gearing to establish the spiral pitch.

LLoyd

After some thinking, I think that you are right.

Wrong CNC machine. Use a CNC lathe for a perfect scroll. Just like threading.

Karl

What's that Lassie? You say that Ignoramus18921 fell down the old rec.crafts.metalworking mine and will die if we don't mount a rescue by Mon, 02 Aug 2010 20:32:53 -0500:

Your right.

how about a cam groove in the OD of a cylinder.

great example!