View Full Version : Need Help! machining block letters


chaz6966
02-23-2009, 09:18 AM
i have sunk block letters into a solid .012 deep for a logo.
some are .031 wide some are .125 wide(larger size).
whats the best way or toolpath to machine them in bobcad.
do i have to pick each one individually and machine one at a time.
my toolpath crashes through the solid to the next letter. on some of them.
z level finish v22.

the block letters were extracted from the solid to leave an impression in the block for depth of detail.

Allen123
02-23-2009, 10:57 AM
If the letters are flat on the bottom, then the best bet would be to do a pocket for these letters.

If you are running v22 you will want to create a pocket feature for every letter as to control the machine order.

V23 you would only need one pocket feature because you can optimize the tool path between pockets - in other words have it cut in a logical order -

If you are having an issue with the Z level I would check the solid.

But you really wouldn't want to run a Z level anyway because you'll have a really hard time ( with out editing the code ) to get the software to cut at the bottom of the surface. Not sure for Z level finish but the rough will not cut at the bottom of a surface it's always just a little bit off.


Example if you had a pocket in a solid that z's position was Z-1.26 or something like that. The Z level rough will not cut to Z-1.26. You would think you could just take that depth a divide by number of passes and have it finish that bottom surface, but nope that doesn't work it still off.

So in order to finish a flat you need to run a 2D pocket for finishing.

http://i564.photobucket.com/albums/ss86/damjuice/mkengraving.jpg