First router type machine desing

[DoubouHeese]

This is first design which is almost ready but still under slight development.

http://www.doubou.net/pics/dwcnc_1080p.png
www.doubou.net/pics/3xdwcnc.png

If any suggestions or anything to say please feel free to let even criticizing comments.. I'm here to learn.

Btw. I'm currently studying machine automation engineering..

[jsheerin]

Nice renderings.

I'd recommend fully supporting the rails on your Y axis and having that support tie the rails together. Alternatively, make sure you calculate the amount of deflection you will see with these rails under the cutting conditions you plan on and that that deflection is acceptable.

[Jesse B]

Those are some stunning renderings. Can't wait to see this all come together.

[Phife]

This looks alot like the LL Micro, with a heavier Z. What size are these? cutting area?

Great looking renderings! nice touch!

[FandZ]

Gorgeous design renders, of course, but you want criticisms. I'm guessing your useing about 1 inch rods across and your Y axis is about 18 inches wide? or 20mm rods and about 500mm Y axis? I don't think you'll need to have them supported for such a short length. Of course it wouldn't hurt. k2cnc uses just a back plate on their smaller sexy machines. http://www.k2cnc.com/shop/proddetail...2514-09&cat=26

One thing I would consider is pushing the rails back somehow so your spindle winds up in the middle of X axis rollers. That way, you won't end up loosing table space once your spindle is mounted.

Only other thing I can think of is your cutting table/base seems permanent. Accidents happen, so being able to replace a table top is important to me. It may be something you want to consider.

[Jesse B]

Originally Posted by FandZ Only other thing I can think of is your cutting table/base seems permanent. Accidents happen, so being able to replace a table top is important to me. It may be something you want to consider.

This could easily be solved by simple attaching a sheet of MDF or something similar to the base, allowing you to swap it as you please.

[DoubouHeese]

Thanks for everyone!

Indeed it it's kind a similar to LL's micRo because I used it as inspiration.. (shame on me )

Some measures for you:

- All frame and base parts are made from PE (polyethylene)
- Base is 650x500mm
- X-rails are size 25 and 500mm long
- Gantry supports are 50x50x190mm
- Y-shafts are 20mm in diameter and 400mm unsupported lenght (total 500mm)
- Z-shafts are 12mm and 140mm unsupported
- Y and Z rails are hold in place with tight fit and M8x25 setscrews
- Cutting area is 450x286x90mm (X*Y*Z)
- Steppers are Nema 17 size and about 63 oz-in holding torgue

Those linear rails on X are neat for their ability to resist torque in all three directions. For that I believe that supporting more that Y-axis will overdoe it but I might be wrong. And after all that will be an easy fix if left undone at this point.

Originally Posted by FandZ One thing I would consider is pushing the rails back somehow so your spindle winds up in the middle of X axis rollers. That way, you won't end up loosing table space once your spindle is mounted.

Gave a thoug for that and conclusion was that I increased the base 60mm to the front and by that got kind of same results as pushing the gantry back. And when I have finished this one I can cut new gantry supports for me self

Originally Posted by Jesse B This could easily be solved by simple attaching a sheet of MDF or something similar to the base, allowing you to swap it as you please.

Yes, that is going to be my plan for the machining base. Also considering to purchase lowprofile working bench for workpiece holding. Example http://www.epple.com/en/products?pag...&category_id=9

I'll try to put out some new renderings to feast your eyes

[FandZ]

Originally Posted by Jesse B This could easily be solved by simple attaching a sheet of MDF or something similar to the base, allowing you to swap it as you please.

YOu could do that, but then you'll need to secure the mdf and then secure your stock on the mdf. Plus it'll cover up all those handy securing slots.

It would be really convienient if between the T slots if you had strips of semi-permanent MDF boards. That way you could replace one at a time if one got messed up and have full use of the T slots.

DoubouHeese, when do you think you'll start your build?

[compfranon]

Originally Posted by DoubouHeese This is first design which is almost ready but still under slight development. http://www.doubou.net/pics/dwcnc_1080p.png www.doubou.net/pics/3xdwcnc.png If any suggestions or anything to say please feel free to let even criticizing comments.. I'm here to learn. Btw. I'm currently studying machine automation engineering..

If your build turns out as stunning as the renderings then you're on to a winner.

I'm just at the very beginning of a build so will be watching this thread with interest. Good luck with the project.

[DoubouHeese]

Currently we are finishing the desing and getting parts together. This won't be a total "Hard core" DIY project because we treasure guality and don't have the place to make parts. Therefore almost all parts will be ordered and only slight machining and such will be done by our selves. Should we be blessed the machines could be up and running within a month. That might even be quite realistic estimate. If interested, would guess total price for parts to be about 350-450€.. "This is like building legos "

Edit: Forgot to mention by "we" i mean me and DoubouMigatus..

[DoubouHeese]

Ok. Parts starting to come together. Already got few steppers, driver, couple possible powersupplys and some other bits and pieces. Tomorrow I'm going to order all linear parts and I guess plastics too if the offer is within our limit. Hopefully we'll begin assembling soon... I'll post pics from that for sure !

[fatal-exception]

Your table/base will be very weak with all those slots cut into it. I would consider something way stronger than PE for that member, maybe solid aluminum. It is the base of your machine, and if it is weak, the entire machine will suffer.

Another alternative to those slots are tapped holes every couple of inches in a grid pattern.

Paul