Aluminum profile and alu plate 1500mm x 600mm x 150mm working area, first cnc.

[Clive S]

If you are mainly cutting wood the screws would be better with X and Y with 10mm pitch and 5mm pitch for Z.
The PLC-4X-g2 I don't think is a motion controller it is a BOB so has to run from the PP. or buy the matching motion controller as well to run it from the Ethernet port. Or look at the smoothstepper card.

Check the inductance on the motors before buying. Good one can be got from https://www.cnc4you.co.uk/Stepper-Mo...s/Nema23-3.1Nm.
In fact don't buy any electronics until you have the final design done and built.

I think you will also need some diagonal bracing on the frame.

Good luck with the build.

[pierantoine]

Thank you for your answers..

Boyan,

the 2 spindle bracket is a very good idea, but I've also already seen your spindle block mount on your 2nd design (quite unusual...) similar to what jonathan has also done and for me it's perfect ! i'm tempted to follow this route in the future...

I have 150mm of travel
up down



i've seen your video: if i'm right between the black front plate and the rail there is another black steel part (red arrow), did you screwed the rail on this part (brace) or in the front plate ?


i can do something like this the rails are screwed in the front plate, the green parts acts like a brace, maybe green parts and front place could be epoxy glued together ?

[Boyan Silyavski]

yes, its bolted, see bellow

[pierantoine]

thanks again, what a fast answer !
ok here is the 2 brackets and the bolted rails from the front...

[pierantoine]

Hi,

I have
Do you think there is an improvement in mounting carriages on the side (position A : on the green plate on the pic) or behind the yellow plate (position B), I would say the position A is better as it is wider it doesn't reduce the working area and the external distance is 340mm instead of 200mm .but i can be wrong...

question 1 : For you what is the best position for carriage A or B ?




Question 2 for this axis 800mm wide do you vote for a 1610 or 2010 ?

Thanks for your advices

P-A

[pierantoine]

i will take the steel frame route.
there is a useful post where i've seen nice frames from Dean and Boyan... i've made a mix :-)



I've seen a post where Dean suggest 2 fixed ends for the ball screw
http://www.mycncuk.com/threads/8490-...x750x200/page3
"To give you an idea I recently built a Slaved axis 4x4 router with 20mm Dia 10mm pitch screws 1700mm length Fixed/Fixed ends with 2 x 3.1Nm steppers"..

the 2 beams supporting the rails can be slightly not parralels so an adjustment for fixed ends must be adjustable.
if you have made something like this i'm really interested.. thanks

[pierantoine]

Thanks to every one after many hours of reading here is what I will make.
Here is the final version before starting the build and ordering the parts...

the green frame could be made on a bench before the red / yellow...

adjustable mounting of the ends...



the green plate is 15mm ground plate maybe. i'have found 20mm but is not ground...




between collet and frame (without bed)
218mm Z up an 68 mm Z Down.

For the plates 40, 50, 51 supporting the carriage would it be better to have 20mm not ground or 15mm ground ?


Do you have any comments before I start the build ?
Many thanks..