Purchasing new parts for new build.

[samsagaz]

i already start the draws! i really liked designs like Silyavski design https://www.youtube.com/watch?v=C9hTLN1CydU (low profile and moving grantry) or fixed gantry like https://www.youtube.com/watch?v=K9UA9ZRFwWU

These are very good machines i think, and maybe impossible to make for myself but will try to draw something :D

I will use welded construction materials like IPN and UPN ones.

will try to draw two designs to see wich recommend me

[Clive S]

or fixed gantry like https://www.youtube.com/watch?v=K9UA9ZRFwWU

That and the series (3 vids) are probably the best I have seen in a long while. Thanks

[samsagaz]

yeah, incredible right? and very well recorded too!

[Norgmonster]

Hi,

I'm new to the forum and in the planing stages of my own cnc router. I'm planing to start with a 2' x 4' cutting bed and use materials that will allow me to upgrade it to a 4' x 8' when i have the space. To do this i'll use 3" x 6" aluminum profile, rack and pinion rail attached to the stepper motors with a drive belt (except for the z axis) and other materials that can be extended or deconstructed. The design is based in part on "Joe's design" (seen being made hear)

https://www.youtube.com/watch?v=5ThZws-858M

It being an American video and being based in the UK I have found most of the equivalent parts except for the X and Y motor mounts that link to the rack and pinion rail.

All in all i think i have the design sorted out "in my head" and will start to drew it up in CAD asap.

First of all i would like to ask if anyone has come across this design and what they think of it?

And second, what is the best hardware to buy for something that will be enlarged in the future (NEMA 34 N.m. 11.2 stepper motor, stepper motor Drivers and so on).

[samsagaz]

what about the ballscrew diameter? how its calculated? i have 2 x 1300mm length 25mm diameter and 2 x 1000mm but 16mm diameter (1605 i think that is the model).

will be the 16mm very small for the Y Axis? im thinking abt purchase 20mm Hiwin rails as you guys recommend me maybe 2 x 1000mm to get close to 800 mm of travel.


As i have 1300mmm i need to cut it and will waste like 400mm :(


cut the 16mm will be better for me, because can use the UPN that i purchased today and think that will not fit the 20mm rails + 25mm ballscrew because have just 160mm width.

[Clive S]

Samsagaz UPN!!! I think you are going to waste a lot of money if you don't get a drawing together before buying parts. In my opinion the 25mm screws are over the top. Generally on a machine of this size 1610 for x and y and 1605 for z might be a better choice. Good luck with the build.

[Norgmonster]

For my 4' x 8' table I'm planing to use Nema 34 motors with around 12Nm for the x and y axis. Is it overkill to use the same for the Z axis (planing for any future upgrades) or should i go for a nema 23 with around 4Nm?

The motors will be driven by rack and pinion.

What would be the best digital stepper drivers, breakout board and power supplies?