Accurate Strong Gantry

[vargai]

Hi,
Incredibly detailed piece, very nice done.
The patterns are so sharp even in a mm .
What sort of material is it?

[JAZZCNC]

Hi,
Incredibly detailed piece, very nice done.
The patterns are so sharp even in a mm .
What sort of material is it?

Aluminium 6082T6 cut with a simple 90degree spot drill nothing fancy.

Regards the belts and cutting conditions let me just say my machine 99% of the time it's been built has cut nothing but aluminium and the belts are completely uncovered being exposed to millions of flying sharp and very hot chips so are working in the worst enviroment and I've only ever had to replace two belts. This wasn't because of wear it was because I left a pulley loose which fell off after adjustments for a bracket for sensing belt breakage. (It was a very good real world test of my new belt E-stop.!)
The other I trapped and damaged moving the machine due to not being covered. (So do as I say, not do as I DO, and cover your belts from the start other wise it never get done.!!)

[vargai]

at first sight thought painted wooden, but it cannot be done so sharp

[JAZZCNC]

at first sight thought painted wooden, but it cannot be done so sharp

Yes probably because of poor video done with phone camera.! . . .Looks much better in real life and very shiny.

[Sven]

I have a similar set up just 90 mm wider. I would not do it again, setting it up without backlash is a pain.

Next one wil have a dual stepper, a leadshine easy servo, which is a stepper with encoder.

In this design I would box up the 4 beams so they become one, that is much stiffer.

[vargai]

Hi Sven,

Yes , the four box should be redesigned somehow, originally I wanted to tie the boxes with 3, 4 plates to work together after placing the
ball screw
What does the similar exactly-how did you make the synchronising?
Nothing is written in stone-just thought to skip the step with stepper and make higher grade machine but do not know too much about stepper.
I hear of lead shine and certainly stepper technology becomes better so if there is an reliable option instead the more expensive servo why not.
My friend who is member of a CNC DIY group made a 5axis machine with steppers for woodwork upon order.
They mates from the group says: everything is ok but why did not you use servos.
Probably stepper is undervalued in public awareness.

[Sven]

I have the second setup in your diagram, with the motor in the middle. It is impossible to get enough tension in the belt without putting big loads in the spindle bearings.
I added a guide to push the middle section of the belt above the motor to reduce floppiness. still not good.

[vargai]

Next one wil have a dual stepper, a leadshine easy servo, which is a stepper with encoder.

Hi Sven,
I read a short 20 page long description of leadshine easy servo and did not find mentions of dual purpose.
Can you point to it ie. link or so?
Thanks
István

[Clive S]

Hi Sven,
I read a short 20 page long description of leadshine easy servo and did not find mentions of dual purpose.
Can you point to it ie. link or so?
Thanks
István

Is this the one you are thinking about as shown by Dean :- https://www.youtube.com/watch?v=ZMZdCcLQc4M