Edit feedrates - Offsets - Circle Centre Button

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Rich
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Edit feedrates - Offsets - Circle Centre Button

Post by Rich » Sun 22 Apr , 2007 10:53 am

Hello,
Could anyone give me a quick explanation of the edit feedrates dialog box in VR milling and also the cicle centre option in the offset page?
Thanks in advance! !

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Post by Denford Admin » Mon 23 Apr , 2007 8:57 am

In VRMilling version 2:

Menu Editor -> Edit -> Modify Feedrates:
Check the top option to change all F values in the editor by a percentage (eg: F1000 will change to F2000 if you entered 200% in here)

Check the next option to Alter feedrates at B.
This means you enter a single feedrate value to change within the program, and alter ONLY that value by an amount (Shift+/-)
You also have some additional options to change all values above this value (B), below or at.

Offsets - Circle Centre Button
This option is useful for setting the workpiece offset for a round billet.
eg, if you have a chess piece in the milling machine, you may need some accurate way of finding the centre of it.
This circle centre button allows you to touch on 3 points around a round billet, and will find and set the centre to be X0 Y0. Once this has been set, it will make life easy when changing billet diameter, as nothing needs changing

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bradders
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Post by bradders » Mon 23 Apr , 2007 9:37 am

Wish the "Offsets - Circle Centre Button" option was incorporated in VR Milling V5 ?

Rich
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circle centre

Post by Rich » Mon 23 Apr , 2007 10:44 am

Thanks for the reply(s),
How accurate do you have to be on the 3 points for circle centre?
Thanks.

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Post by Denford Admin » Mon 23 Apr , 2007 10:50 am

The more spread out the points are, the better the result.
(ie touch 3 points at roughly 120 degree intervals around the tube/bar)

You won't have to be so exact when touching on, as each of the other 2 points will balance out the result.

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Post by bradders » Mon 23 Apr , 2007 10:55 am

I would put some tissue paper (Cig paper if you roll your own?) on the component and just jog the axes until the tissue paper is removed, do this 3 times. The idea is taken from a CMM (Corordinate Measuring Machine) but they have a fancy probe as opposed to a cutting tool. Its faster and easier than putting a DTI in the spindle and rotating its probe around the circumference of the component, might be less accurate but is depends on what you are manufacturing

Rich
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Thanks

Post by Rich » Mon 23 Apr , 2007 11:04 am

O.K. Thats great, thanks a lot for the help!

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