Laser Centre Finder

[Tony Pratt 1Participant @tonypratt1]

Posted by Michael Gilligan on 13/11/2014 08:11:10:

Posted by Chris Trice on 13/11/2014 02:47:11:

You can't beat a sticky pin.

.

Chris,

Forgive my ignorance but; how would you use a sticky pin to align the centre of an existing large diameter hole?

I know how to use one to locate a tiny centre-pop, or an edge, but that's a different matter.

MichaelG.

Same way as an edge, pick one side of bore with the sticky pin, zero dial or DRO. Move X axis to other side of bore, pick bore edge as before. Use the feed dial to move the table to a position half way between1st & 2nd reading this will be centre in X direction, repeat for Y direction.

Its best to operate roughly in the bore centre to start with, a sticky pin isn't the most accurate way to do this process. Using a true running dowel & touch the bore in 4 places is better and then the best is using a DTI to centralise the spindle to the bore is the most accurate.

Tony

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Tony Pratt 1 on 14/11/2014 15:34:38:

Posted by Chris Trice on 13/11/2014 02:47:11:

You can't beat a sticky pin.

 

Same way as an edge, pick one side of bore with the sticky pin, zero dial or DRO

.

Thanks, Tony

Yes, I know how to do it the long way.

I was asking Chris specifically in the context of his "You can't beat a sticky pin."

I think Dan Gelbart's device beats it hands-down [for speed and convenience, if not ultimate accuracy] for that particular application. … have you watched his video?

MichaelG.

Edited By Michael Gilligan on 14/11/2014 16:48:20

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