Inventables Community Forum

Workpiece hold down options?

@TravisLucia
If you plan to make your own Waste Board we have put together the following information for your review.

The engineering files for the 1000mm board (http://bit.ly/1F7kaxH) and silk screen file (http://bit.ly/1Ho03vw)

You’ll also need the hardware that comes in the kit but you can add them to your shopping cart separately.
a. 144 threaded inserts, 2 bags of part #30517-013
b. 14 pre assembly insertion nuts, 2 bags of part#25281-023
c. 14 Button Head Screws M5 x 20, 2 bags of part #25286-153

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@Zach_Kaplan thanks for the reply. I tried following the URL’s to look at the engineering files and was met with a screen saying the files were deleted or are missing/ “You don’t have permission to access these documents” I created an account and still had troubles.

Try this link:
https://workbench.grabcad.com/workbench/projects/gcl5zpCuwqCXWLvYktLQBc-2IHvossNo37ycTOkzg6gREW#/space/gcvs_XeRNVzNkfG_tFTAMd0C2lBbCsLcagOxXb1Jlki0kT/folder/858489

I think having a few options for material holding is key. Depending on the work piece and type of milling your doing one option might work better than another. I wasn’t a fan at first of using carpet tape but it has grown on me. The type i use holds the material slight above the waste board which saves a little wear on it if you cut down too deep. I do need to find that mega roll on Amazon since buying the smaller rolls can add up over time.

Would it damage the endmill if it cuts through the material and into the tape? I worry that the adhesive would gum it up and get stuck in the flutes.

I haven’t had any issues with it cutting through the carpet tape and getting gummed up,

Hey Gang
I have uploaded a project for some hold downs with images and instructions, there is also an Easel.com link for the design.

I have tested it with a few jobs and so far it seems rock solid with no movement.

Let me know what you think.

3 Likes

This will be the route I will be taking. I plan to run an old central vac in the garage, the CNC will be in the basement. No need for clamps, the vac will hold down all pieces firmly untill milling is complete. This also means that I can use part of that suction to collect the dust during milling.

This design seems like it would work well, based on what I have read about keeping the material from moving laterally…

Comments?

Oooooo that looks really cool. Both cool looking and functional. @WarrenDownes maybe you should try these spiral ones?

I just printed one of those to play with. Just getting to motor wiring now on the x-carve, so, it will be a little bit longer before I can test.

Cool! I converted the file to an Easel project so that it is easy to carve. I don’t have a machine at home so I can’t test it out until monday, but if anyone else wants to give it a try:

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Just cut 4 from your easel project after enlarging them a bit, came out perfect.

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Someone get @paulkaplan a machine for his own. He deserves it!

Or, is that taking work home?

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:blush: i appreciate you saying that. It is more of a “one bedroom apartment, no room for a shop” problem. I am getting a Carvey though! Should be quiet enough to run without bothering my neighbors.

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Want to post some pictures? Do they work as clamps?!

Another one…

cool thanks @paulkaplan will check out those spiral ones

@TonyNo you can try my one that works the same https://www.inventables.com/projects/workpiece-hold-down-clamps the little wedges hold it really firm.

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They work pretty good, still too soon to evaluate them fully. here’s a pic. Made mine a bit larger and thicker from plywood.

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