cnc profiling core incl sidewalls, trouble sw ripping off

[hamerhead]

If you profile with a router to all but the first and last 20mm of sidewall the remaining sidewall will provide all the integrity needed to stop sidewalls becoming detatched. Of course this means a full width tip and tail spacer.

[chrismp]

for all you guys having trouble with holding down the cores on a cnc or router bridge profiler, i think this might help:

http://www.widgetworksunlimited.com/CNC ... essure.htm

shouldn't be too hard to build a copy.

[Brazen]

The only trouble I've always seen with this (never tried it) is passing the end of the material then having it move/lift whatever's on the table. Did you try one of these?

[chrismp]

nope, never tried one, but i think i'll build one soon. i guess i'll either chamfer or round off the edge of the pressure foot so it easily slides onto the workpiece (sth like the pressure foot of a sewing machine).

edit: found a video of the thing in action http://www.youtube.com/watch?v=H8smFVGdXKk

[chrismp]

here's another design for a pressure foot

[twizzstyle]

I'm a bit lost. Do these things have rollers on the bottom so they can move around while they cut?

[chrismp]

nope, they're just some kind of smooth plastic that slides on top of the workpiece.