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Can't cut a straight thread

Posted: Wed Sep 30, 2015 1:08 pm
by 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
thread params 1.jpg (77.57 KiB) Viewed 7656 times
When I hit Generate, I get a tapered toolpath like this:
unwanted taper.jpg
unwanted taper.jpg (291.13 KiB) Viewed 7656 times
If I go back to the parameters, they are changed like this:
thread params 2.jpg
thread params 2.jpg (79.32 KiB) Viewed 7656 times
Why does it keep changing my parameters?

Thanks,
Brandon

Re: Can't cut a straight thread

Posted: Wed Sep 30, 2015 1:09 pm
by 1384986994
3dm file attached

Re: Can't cut a straight thread

Posted: Thu Oct 01, 2015 3:53 pm
by 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
2015-Turn_Threading.PNG (6.47 KiB) Viewed 7644 times
We have an enhancement request not have a taper when programming straight threads on turn threading operation .