Need Help!- how to flip object accurately

[awe_indo]

hello all
I am a new person in the world of CNC
I have a problem about how to flip the guitar body or neck accurately
so please help me ...
I've heard about the guitar jigs.
or there are other methods?
Is that Anyone can explain how to make it?
Thx's before...
i hope someone can help me..because this problem really make me confuse...

[dustin1706]

Simply use some holes and dowels to connect your workpiece to the spoilboard and make sure your last step is the contour cut.

As in post #6 of this thread http://www.cnczone.com/forums/showth...186#post780186

[awe_indo]

thx's dustin

[awerby]

that the coordinate system doesn't shift when you do the flip. The simplest way is to drill two holes in your spoilboard, right in the middle (along the Y axis) outside the cutting area, and put dowels in them facing up. Drill corresponding holes in your workpiece. Set your Y zero point at the mid-point of these holes, and make sure the part is centered on Y in the CAM software. Then, when you flip your workpiece over and clamp it down again after cutting the first side, it should still be in registration. Just make sure you flip the CAD model accurately along that central Y axis and all should be fine.

DeskProto does it a different way, that also works well, using its 2-Side Wizard. You set up blocks at the front left corner, for the corner of your workpiece to nestle in, and true them with your cutter. Then you fasten down your part and make a cut at a specific location (given by the software) on the back edge of your workpiece. Place the X/Y zero at the front left corner, not in the middle, as in the previous example, and the Z axis zero on top of the workpiece (the thickness of which is communicated to the program). Then when you've cut the first side, you flip the part over, nestle what was the back left corner in the blocks, fasten it down, and run the other side; the software makes sure everything's in the right place. DeskProto offers a free trial that lasts a month (see www.deskproto.com) , so you can try this yourself without having to pay.

Andrew Werby
www.computersculpture.com