[hkenuam]

Hello,

I have a serpentine pulley that I'm attempting to create on my mill (don't have a lathe) and did some test cuts with the appropriate pitched cutter and the grooves that I want to produce look decent. I began with a profile operation with the lead being circular. This allowed the cutter to come in from the side (not the top) and make a pass around with the fly cutter cutting .010. I also turned on Cutter Comp which allowed me at the machine to adjust the cutter diameter each pass around taking more until the cut was to depth.

My question: In BOBCad, how would I achieve this same affect not changing anything at the machine? For example, I make Cut 1 (tool diameter 3.0), Cut 2 (tool diameter 2.90), Cut 3 (tool diameter 2.98), Cut 4 (etc...) each of them would have to be a different tool definition in BOBCad with different tool diameter and physically at the machine??

I'm probably making this more complicated but attached is a visual of what I'm doing.

BTW, using V23.
Thanks in advance!

[moldmker]

Couple ways to do this:

1. Side Allowance value under the Parameter tab.
This can be positive or negative value.
Will make 1 pass with leadin/out.
Must use Offset Rt/Lt (not Comp Rt/Lt)

2. Stock Remaining + # of Side Rough Passes
Example: Enter .1 for stock and 4 passes, it will compute 4 passes of .025 radial DOC.
The pattern will be: Leadin...1 pass...feed in to next pass depth...1 pass....feed in ..etc. ...then leadout.
Again, must use Offset Rt/Lt (not Comp Rt/Lt)

[Perfect Circle]

Here is what I got using a 3.000 dia. cutter.
Stepping down also.
Good Luck~!
Ok here is the code from center of arc at x and y zero

[hkenuam]

Thanks a bunch guys!

moldmker, I tried the second approach which is much easier to setup and it looks great!

Can't say enough good about this site and the people who post here!

hkenuam