I drew a quick set of notches of a variety of widths, based on the width of the OSB we have (never trust the named thickness of plywood Unlike the cardboard you used, plywood is not Just like in laser cutter week, this is a press-fit project.
#Pls cadd will not snap to selcter settings skin
Places in that onion skin because they don't all actually lay flat at Z zero on the table. 02" with this not-flat OSB surface, to ensure that they didn't get ripped loose and destroyed by the end mill (and then you have toĭo a little more work to remove them afterwards).Īlso, as you can see above, the weird shredded bits of this chicken nugget-type material, not being flat, disappear in For really small ones, if you have any, you would need to make that skin a See that the endmill cut all the way through the sheet in some places with this.įor larger pieces, this is fine. 03" skin left - it was too thick to easily remove afterwards. So thick that they're hard to remove afterwards. To hold the parts in place (a fairly thin skin of smooth/flat material is suprisingly stabilizing for parts that aren't miniscule), but not It's a super-thin leftover layer of material referred to as an onion skin. One nice way to compensate for the weak points of a vacuum table is to cut almost all the way to Z zero, but not quite. Possibility, as well as the possibility of fire, which is not at all unlikely on an improperly operated router. These machines can be very dangerous - so toolpath setup has to be done carefully to intentionally avoid that The end mill if they are not held down securely enough, and the tool is able to bite into it enough to do that. Even large, heavy pieces can get grabbed and thrown off the machine by Held down at all, once they're cut loose. The vacuum will pull flat large areas of flexible material, just to an extent. Material needs to lay flat on the table for the suction to work - larger areas are heldĭown better. It's pretty great for a lot of reasons,īut not undefeatable. Some machines, like the Onsrud, have a vacuum table to hold things in place during cutting. You're getting the flattest stuff possible. If you are ever buying your own sheet material, it's worth putting the effort in to making sure The machines are pretty reliably flat (some good, some really good) - but it's typical for the material to This is the same kind of issue that shows up when your laser cuts go out ofįocus in places, or when the modela cuts traces that are deeper in some places than in others - the beds of The bed of the onsrud is machined very, very flat/parallel to the X/Y cutting plane. Out your onion skin - it will not be consistent.
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you'll see a side effect of that when you check Really though, even the smoother side is not really flat. We have to put the smooth side down on the onsrud table for better vacuum seal. It's smoother on the other side, but not smooth - clearly shredded scraps in an We're working with 4'x8' sheets of half-inch OSB this week. I will make this work somehow or another so you can expect a Zoom meeting at 7-7:15 Thursday. *I did not manage to bring all my stuff home tonight, so I still need to do setup work to have Mastercam use at home.