1987 Sharnoa SDC-80D XZ and YZ tapping cycles

[ERIC14779]

Anybody have any idea if this machine is capable of doing XZ and/or YZ plane tapping cycles ?? I have to tap a lot of 6-32 holes and I am planing to use a right angle head. The parts have to orientated so that I have to tap in the XZ or YZ plane...

 

Is this possible with out a lot of headaches ???

[robk]

Don't know if your machine is capable of that, but I wouldn't feel comfortable running a tap in a RAH, especially one that small. I would threadmill the holes then you don't have to worry if you could run canned cycles in different planes.

[ERIC14779]

Robk,

 

Yes I cringe at the thought as well but I am exploring....

 

 

What if I used a old school "floating" tap holder....

[robk]

I have done some searching on that subject a few months ago also because a standard threadmill could not go to depth, but our parts cost too much $$$ to take that kind of a chance. We ended up getting a custom made threadmill and cut the feature without a problem. I have been threadmilling with RAH very often, and feel very comfortable recommending that route.

 

[ERIC14779]

OK thanks...

[Mjölnir]

I don't recall seeing anything about tap cycles in the XZ or YZ planes in the Sharnoa programming manual. Something like that would have jumped out at me as it'd be unusual. For me anyway.

 

If you were to go with a thread milling route, be aware that arcs in any plane but XY must be programmed in polar coordinates.

 

We've got two posts for our Sharnoa, one for cartesian and one for polar coordinates. According to the post guru at our Mastercam VAR it is not possible to switch between cartesian and polar coords within a single program posted from Mastercam.

[crazy^millman]

According to the post guru at our Mastercam VAR it is not possible to switch between cartesian and polar coords within a single program posted from Mastercam.

 

And why not?

[Mjölnir]

And why not?

 

I don't know. Presumably it is a limitation in Mastercam's post processor?

[ERIC14779]

The operator was thinking he may be able to write a canned cycle or macro that would do XZ or YZ tapping.. I have zero experience with any of the Sharnoa controls (again this one is a Tiger 6)

 

is this an option ??? (writing a canned cycle)

[Mjölnir]

If the Tiger 6 is anything like the Tiger 5, without getting the manuals out I'll venture to say it's possible. These are extremely powerful controls with programing options not available in todays typical machines. When you can mix absolute and incremental cartesian coordinate positioning with polar positioning all in a single block of a program, you've got yourself a VERY flexible control.

[Guest CNC Apps Guy 1]

I know on FANUCS, you specify by parameter which plane your canned cycles operate in. Using G10's, that could be changed on the fly. But, threadmilling is definitely the better option.

 

:edit: changed axis to plane :edit:

:edit: changed tapping to canned cycles :edit:

Edited November 5, 2010 by CNC Apps Guy 1

[ERIC14779]

The thread milling seems to me to be the best as well... backlash in any RAH will wipe out the threads... I think...

 

I will try to sway the Operator to give up on a Threading cycle and go with milling the threads in..

 

any suggestions for a thread mill vendor for 6-32??

 

I do not know what the material is yet.. I do not think it is anything exotic..

[robk]

I'm a big fan of Emuge because their threadmills are bigger dia. then most (less deflection), but I don't think they go that small. Take a look @ Advent and Harvey

[mkd]

Guy in town is retiring after a cancer diagnosis and unloading a batch of Sharnoa CNC knee mills among other shop equipment.

 Just throwing it out there....