Threadmill

[Dtm]

This is my first time threadmilling in mastercam. I have a form tool for this special thread. It's a .200 pitch thread right hand thread and the major dia is 6.448 dia. The tool is cutting to small of a dia. If I change compensation type to off, then it cuts to large of a dia. I need to use cutter comp. Also, after I set the major thread dia it is greyed out. I don't know how to make it active.

28046.zip

[Mgrenier]

In the cut parameters, adjust the Allowance (overcut) to fit you needs.

 

HTH

[jeff]

You can make it active by selecting the Center Point of the circle and not the circle itself.

Set it to COMPUTER, and then you can input an "overcut" value also.

I have trouble using wear comp with threadmilling for some reason.

[gcode]

Your undefined thread hob is defined as Ø1.00" but its drawn as Ø.500"

Personally, I just define thread hobs as an endmill of the correct diameter.

I don't get pretty pictures with I run verify, but the output is good

You have Wear enabled so you will get CDC output

 

The major diameter is usually set buy the diameter of the arc you select

but the arc in your file is 6.319" dia.

 

Not sure what's going on there

[Dtm]

Your undefined thread hob is defined as Ø1.00" but its drawn as Ø.500"

Personally, I just define thread hobs as an endmill of the correct diameter.

I don't get pretty pictures with I run verify, but the output is good

You have Wear enabled so you will get CDC output

 

The major diameter is usually set but the diameter of the arc you select

but the arc in your file is 6.319" dia.

 

Not sure what's going on there

 

Thanks Gcode. I changed the tool definition to .500 and that did it. I don't know why it wouldn't input the correct number.

[Bill Henderson]

Searched to find this. thanks