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M
Mickyd11-Visitor
1-Visitor
October 18, 2012
Solved

Chamfer back of hole

  • October 18, 2012
  • 1 reply
  • 2818 views

hello guys

ive got to machine a chamfer on the back of a 25mm hole using a 16mm dia dovetail cutter,ive tried using trajectory milling but the cutter just comes down through the component,how do i get the cutter to come down in the centre of the hole then machine round the back of the hole.

thanks for any help


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Best answer by SteveLucas

Michael,

this what I do to get any tool to start in the center of any diameter hole. take the hole diameter minus the tool diameter times .208 to get the leadin leadout amount. then set the entry angle and exit angle to 135.

In my example picture the hole diameter is .375 and the cutter diameter is .250 so the math is .375-.250=.125*.208=.026 this value goes in the lead_radius and tangent_lead_step as shown in the picture.

leadinleadout+hole+center.JPG

leadinleadout+results.JPG

As you can see in the picture it makes an nice entry and exit back to the center of the hole.

1 reply

S
SteveLucas1-VisitorAnswer
1-Visitor
October 18, 2012

Michael,

this what I do to get any tool to start in the center of any diameter hole. take the hole diameter minus the tool diameter times .208 to get the leadin leadout amount. then set the entry angle and exit angle to 135.

In my example picture the hole diameter is .375 and the cutter diameter is .250 so the math is .375-.250=.125*.208=.026 this value goes in the lead_radius and tangent_lead_step as shown in the picture.

leadinleadout+hole+center.JPG

leadinleadout+results.JPG

As you can see in the picture it makes an nice entry and exit back to the center of the hole.

M
Mickyd11-VisitorAuthor
1-Visitor
October 18, 2012

Thanks Steve

is there a formula i can put in the required parameters so i dont have to work it out each time?You do seem to help me out a lot cheers.

michael

S
SteveLucas1-Visitor
1-Visitor
October 18, 2012

Michael,

I have never tried to automate how the formula is calculated from within Pro? Not sure how to do it? maybe some one else has an Idea.

I do it so much it's just automatic for me.

Steve

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