Hi all,
Still in the game, but things are slow here.
I ad a fun job last week and thought I would share some pictures.
This is a hollow cylinder 4140 PreHeat with 72 holes around the o.d.
They are in 5 rows and spaced .060 apart as they travel around the dia.
they have 8 holes per row.
The rows have a 1/16" slot .020 deep connecting them.
The rows and holes are engraved with a .031 ball mill.
The engraving is .015 deep #1 thru #8 and rows A thru E
The engraving and slots are on a 1.25" radius

hope you enjoy the pictures.
Dave

http://img29.imageshack.us/img29/348/40192621.jpg

http://img17.imageshack.us/img17/9232/29516070.jpg

http://img689.imageshack.us/img689/4575/96130461.jpg

What control and what kind of 4th axis head? Looks like a fun job.

That would be a genuine Deckel CNC dividing head/4th axis...running i believe under the Dialog4 control....uses the Bosch servo drive for the 4th axis and the "C" on the CRT.....
Not a true full 4 axis setup as i believe the Dialog 4 is only capable of running any 3 axis at a time, but a very neat accessory.

Dave:
Very nice part....i love that dividing head....thanks for sharing.
Cheers Ross

Yes, Ross, Dialog 4, the control will do only three axis moves together
but can rapid in all four.
Dave

Can you post a picture of your set up that shows the entire set up? I've never seen a for real Deckel 4th axis head.

Cool project- I cant tell from the photos, are the holes parallel to the outside edge of the cylinder or are they on a spiral?

Steve

They are in rows of five across and 8 holes at 22.5 degrees offset .060 each
this makes the offset for adjusting the overall length of the internal hub to this part allowing to set overall length of the unit at .060 increments.
It is adjustable from .471 to 2.551 in length.
they look like a spiral because of the next row are equally spaced also.
I am working on a website to promote my engraving and milling work as soon as I can get it all put together i will have pictures of full setups and capabilities.
thanks for your kind words
Dave

The title threw me and then the pictures showed a 3-axes job on a 4th axis set up.
The D4 can point-to-point 4 of 4 axes,
linear interpolation, 3 of 4 axes,
circular interpolation, 2 o4 axes

I still remember how impressed I was the first time I saw CNC machining of a figure 8 on the mantle of a cylinder.
I don't know if you are aware of it but before CNC Deckel used to sell roll engraving attachments. Up to 300 mm dia. and 1000 mm length to be used on a KF or GK21 with a riser block under the main joint.

Looking forward to seeing pictures of your rotary engraving job.

Actually, the latter versions of Dialog 4 can do circular interpolation on 2.5 of 4 axes, because you can do a linear move on the third axis while doing a circular move on the other two. In other words, you can make a helix in any of the primary coordinate planes. You cannot do a circular interpolation move in an arbitrarily tilted plane. The only way is to simulate by breaking the move into small linear moves.

Hello Guys,

Hey Dave good looking part,it is easier to see the finished product than when we were talking and you describing it.

Helical cutting became available in software version 2.19 but it had issues!!!

Software version 2.33 corrected the problems with error code 30 "program memory fault" and also corrected the problems with helical cutting. This version also corrected the round error problem.

Regards
DD

Nice looking stuff there Dave! First time I've ever poked my nose into this forum. Those machines are interesting to say the least! Quite versatile. Will be talking with you soon. Glad George pointed me in your direction!

Later,
Russ

Nice work! But what is that part for ?

I am not really sure what it is for.
There is another part with 2 sets of cross holes .030 apart at 90 deg.
a .250 pin goes through the whole assembly. The hole spacings are .060 apart along the centerline of the part.
This allows spacing of .030 increments from .500 to 2.500 by putting the pin through different
hole sets. There are a set of 4 that are used to set a machine table height one in each corner.
Sorry I misled anyone i forgot to put the TH between the 4 and axis.
Dave