Can't cut a straight thread

[1384986994]

Hi,

I am trying to cut a straight 3/4-10" thread on this part and it keeps giving me a tapered toolpath. Here are my initial thread params:

thread params 1.jpg (77.57 KiB) Viewed 7531 times

When I hit Generate, I get a tapered toolpath like this:

unwanted taper.jpg (291.13 KiB) Viewed 7531 times

If I go back to the parameters, they are changed like this:

thread params 2.jpg (79.32 KiB) Viewed 7531 times

Why does it keep changing my parameters?

Thanks,
Brandon

[1384986994]

3dm file attached

[MecSoft Support]

Brandon,

The start point is projected down to the chamfer on the defined part geometry and this results in a taper.
You can change the start Z coordinate to -0.0620146 so set the start X coordinate to 0.375 and extend the Z clearance 0.1303 for the part in question. With the start & end X coordinates being the same, this would not result in a taper.

2015-Turn_Threading.PNG (6.47 KiB) Viewed 7519 times

We have an enhancement request not have a taper when programming straight threads on turn threading operation .