An approach to extending Z-Axis.
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Hi Gerald,
Can you critique the following approach to extending the z-axis. (My application is 90% foam cutting). Is it possible to add height to the parts 1020451PA and 1020456PA in such a way that torsional stiffness is not comprimized? Is there another way that makes more sense? Thanks, Greg btw the parts from domino11 are works of art! Thanks Heath. |
I wouldn't do it.
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Greg, Why would you want risking rising the gantry assy & felx when you could just conceive a lower table ( Lowering the X-bearers ) ??
Playing with flex, I would say !! |
Greg,
I actually have a bolt together table so I can remove the center of the table and cut up to 48" below the Gantry as designed. I am currently remaking my Z-slide with a few Gerald suggested changes to accommodate a 36" stroke z-slide. I have taken a few pages from the SB forum by raising the machine slightly off the floor to allow for a complete 48 x 48 x 96" billet of EPS foam for mold making. I trust this is a similar approach you are considering. Let me know...maybe we can compare notes. Sean |
Ahhh nice,
So if I keep the upper structure as designed, and put my energy into lowering the table center I can achieve my goal? Thanks for the Info Sean. |
here we go.. I think it'll work great!
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Greg,
No problem , glad you like the parts. :) Sean, Greg, Hopefully you will compare notes in a build or mod log so the rest of us can chime in? :):eek: |
Chiming in will be no problem.
I have already sent the new, longer and larger spider to laser cutting. I hope to have it back in a week or two. It's on the LOW priority list at the cutters. They said they would put in the works when the table had a large enough drop to accommodate it. Nils was kind enough to order the eccentric bushings and additional bearings for me with his order, thus I have most everything I need on hand now. Sean |
This sounds really interesting. :)
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I sent Sean a "doodle" I found on PC. Can't remember when or why I did it. To use entirely at own risk . . . :)
Change the attached extension to .dxf when you save it, open with CAD. Wonder if the holes still line up? |
I did change a few holes, added a few to match the Mamba carriage and extended the open area for the gearmotor stepper clearance.
pm me if you want the cadfile i can't get the revised version under my kb limit sean |
Okay Sean, you finish the development on that, and then we will place your drawing in the set. :)
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...I LOVE being the guinea pig:D
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Wow, now that's nice! Is there a bending schedule or does it pretty much follow the smaller spider plate?
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The bending schedule is identical to the regular spider plate.
Nothing on that front to change. I have attached the plate with modifications as a general reference of the idea. Sean Attachment 1849 |
Sean,
That is one strange looking plate but I am looking forward to seeing you use it. |
Maybe we can call it the "pirate" plate - a skull with an eye-patch?
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yeah, I can't say I understand what I am looking at.
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I'm in Marc's camp. :confused:
Shouldn't the holes for the V-rollers line up with the long axis (up/down in the drawing). |
It is a way of getting 2 more z-rollers above the z-motor. Bottom half is the standard spider.
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Oh, the z motor "peeks" through the big hole????
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You can see why Sean had to make some changes, the motor bracket would foul the spider and the holes dont line up with the car, thats why its called a doodle :)
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Thanks Alan and Gerald,
Nice models. |
Thanks Alan!
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I'm impressed.
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Impressive,
Maybe we could call it the super spider.:) |
Tarantula
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Looks great! Now how long a z-slide can you have before it needs reinforced?
And once you get a 36" z-slide are we going to put on a little baby cable chain for the router's cord? I suppose a 4:1 reduction on the gas spring will be needed as well so that it doesn't need to be 24" long... wait..wait..wait...you know what we really need? Neon! |
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