Dust shoe reboot (no pun intended) - Page 2 - Router Forums

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post #11 of 22 (permalink) Old 01-04-2017, 11:22 AM
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What about mounting it on slotted holes that the whole assembly slides up and down as needed?
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Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #12 of 22 (permalink) Old 01-04-2017, 12:17 PM Thread Starter
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What about mounting it on slotted holes that the whole assembly slides up and down as needed?
I've seen some that do that, Chuck. There's a fair bit of engineering involved to get it to respond properly and not jam. For instance, when the shoe comes in contact with a clamp or hold down or other obstruction or passes over a void area large enough for the shoe to drop only to hit the next machining section (does that make sense?). If it is free floating then it drops to its lowest extent where possible.

Of course, if you're always doing large flat sheets then that would be ideal but if you're doing lots of contours or 3D there might be issues. It is definitely an intriguing area of CNC, one I wish to pursue in greater depth (beyond just toying around with plastic containers and $5 brooms).

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post #13 of 22 (permalink) Old 01-05-2017, 09:53 AM
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Just bend the ends back around on them self. The rounder profile will stop jamming and scratching.

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post #14 of 22 (permalink) Old 01-05-2017, 10:11 AM
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I used a similar design years ago. You have to curl the ends up to make it work. In fact I ended up with a "J" shape at the base of the fingers.
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Bill - The J feature has merit to me. There was always a trade-off between a smaller vacuum area and length of the skirt so it didn't get caught into the router bit. A bigger vacuum footprint and it goes off the end of what you are cutting to lose vacuum and throw dust. My 10 degree slant works "most" of the time, but can fail when the angle edge contacts something vertical.

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post #15 of 22 (permalink) Old 01-05-2017, 10:18 AM
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For a Rube Goldberg approach, how about another stepper motor that keeps the bottom of the dust skirt at the top of the material. It would just be the full cutting depth from Z zero. Maybe a chain 360 degrees around the spindle driving 4 acme rods so it rises and lowers evenly. Then a webcam mounted underneath with LEDs to show progress on a Raspberry Pi bluetooth display.
(maybe too much coffee this morning?)
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post #16 of 22 (permalink) Old 01-05-2017, 11:04 AM
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I've seen a few solutions that mount the dust collector on a non-moving part of the Z axis. You can slide and lock it to the height you want it to be (top of material usually) then it stays there no matter how much the bit moves up and down. I've looked into doing this on my Probotix Meteor, but their Z axis design makes this not-so-easy.

Still, as my students are rarely just cutting profiles on flat boards I've given up all hope that there will be any one dust collection solution that works with every project. The fan on the Dewalt routers we use defeats most attempts even on flat board. Make a great argument for water cooled spindles with no fan.

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post #17 of 22 (permalink) Old 01-05-2017, 09:10 PM Thread Starter
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For a Rube Goldberg approach, how about another stepper motor that keeps the bottom of the dust skirt at the top of the material. It would just be the full cutting depth from Z zero. Maybe a chain 360 degrees around the spindle driving 4 acme rods so it rises and lowers evenly. Then a webcam mounted underneath with LEDs to show progress on a Raspberry Pi bluetooth display.
(maybe too much coffee this morning?)
Steve.
I like the way you think, Steve!! I'll get started on that one right away!

David

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post #18 of 22 (permalink) Old 01-09-2017, 09:26 AM
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For a cheap, clear, flexible material I have used clear extruded vinyl carpet runner. Its available at your local blue big box home center in the flooring department. Its comes in 27" roll and is sold by the foot for less than $3. It is quite flexible so perhaps a hybrid of your tupperware solution may work. Just cut the tupperware part off even with or just below the collet and glue on a fringe of the vinyl material.
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post #19 of 22 (permalink) Old 01-09-2017, 07:39 PM Thread Starter
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Thanks, SW! And welcome to the forum. I was just there today but I'll go back tomorrow and take a look.

David

Nothing to do with woodworking at all, just our music at church (I'm the guy with the Koa Takamine) - Airline Baptist Church BC Songs
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post #20 of 22 (permalink) Old 01-09-2017, 07:54 PM
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This is going to sound dumb , because I haven't seen it done before . But my idea is to blow compressed air with a nozzle aimed at the bit , then have a dust extraction shroud on the other side picking up the debris . This way the router bit would be unobstructed visually .
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I don't actaully know anything about CNC router tables , but I stayed at a Holiday Inn Express last night
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