[yamanmax]

Hi every one
I plane to build my second D.I.Y C.N.C
the Machine I Plane to Work With MDF LEXSAN .... etc and I hope It will by Strong enough to work with aluminum
Machine Size 1300X800X150mm
for aluminum extrusions Size 60X60
Motor X , Y Nema 34
For Z Not Select yet
ball screw RM1605
Rail
X : railsSBR16 With nut housing SBR16LUU
Y : railsSBR16 With nut housing SBR16uu
Z Not Select yet





All Suggestions Are welcome

[yamanmax]

photo for aluminum extrusions

[wizard]

Once you start talking about doing Aluminum you need to think far more robust machine design. Id discourage round rails and Aluminum extrusions.

If you insist on extrusions id suggest the largest you can find for the gantry. Ideally the gantry would be a large square steel beam. In either case you need to look closely at the vertical supports for the gantry beam, flat playes dont cut it unless they are very thick.

A hybrid approach would be a steel gantry beam assembly riding on top of an Aluminum framed machine. This is a workable solution that addresses the common weak point in a routers design. That weak point is often the gantry / z axis.

Note that much of the above depends upon your expectations. If doing aluminum means engraving to you then you might get by with a low end approach. However if your idea of doing Aluminum is similar to other sheet goods id seriousl lean to a more robust machine.

[yamanmax]

Once you start talking about doing Aluminum you need to think far more robust machine design. Id discourage round rails and Aluminum extrusions.


If you insist on extrusions id suggest the largest you can find for the gantry. Ideally the gantry would be a large square steel beam. In either case you need to look closely at the vertical supports for the gantry beam, flat playes dont cut it unless they are very thick.

A hybrid approach would be a steel gantry beam assembly riding on top of an Aluminum framed machine. This is a workable solution that addresses the common weak point in a routers design. That weak point is often the gantry / z axis.

Note that much of the above depends upon your expectations. If doing aluminum means engraving to you then you might get by with a low end approach. However if your idea of doing Aluminum is similar to other sheet goods id seriousl lean to a more robust machine.

Thanks for your advise
1- the machine i'm already start work with aluminum extrusions
2- I'm still thinking about z axis all axis are first I put round rails in my design then I read alot of review about round rails and most people was not too much happy with it so I decided to use Linear Rail Guide entil now it's OK
then I read If I want the Z axis rigid There is Double Nut Ball Screw then I now If I put Bigger Size of Ball Screw it will better so I still Confused About The Z axis

[yamanmax]

Some Update
The Sheet Metal For Y axes Just for Test Because I Still Waiting for SBR16LUU
Attachment 364966
Attachment 364968
Attachment 364978
Attachment 364972
Attachment 364974
Attachment 364970
Attachment 364976

[wizard]

Thanks for your advise
1- the machine i'm already start work with aluminum extrusions

OK

2- I'm still thinking about z axis all axis are first I put round rails in my design then I read alot of review about round rails and most people was not too much happy with it so I decided to use Linear Rail Guide entil now it's OK

I'm not wedded to the use of profile rials, round rails can be useful in a proper design and if the builder understands their limitations. At some point though it just makes sense to use the more robust solution which Is profile rails.

What you need to be careful about is that the rails are long enough to meet you work area requirements. Your design seems to constrain the saddle movements which might be a problem. Basically you need enough travel to cover your expected work area with the largest cutter you intend to use. That means you need to account for the saddle widths. Right now your Y axis seems to be especially constrained.

then I read If I want the Z axis rigid There is Double Nut Ball Screw then I now If I put Bigger Size of Ball Screw it will better so I still Confused About The Z axis

Double nuts are one way to eliminate backlash in a mechanical system. Generally you want to get as near to zero backlash as possible. On the other hand larger diameter lead screws address stiffness needs which is another matter altogether.

[Chris D]

Just a quick thought and comment on your design / build.

The side plates appear to be very thin - almost looks like galvanized sheetmetal in the photo. Without additional framing, these side panels, which support everything above the table are a prime area of problems. They simply would not be stiff enough to provide rigidity for anything above basic engraving. The side loads (along the 800 mm axis) would cause substantial flexing on those panels.

Seeing that X axis is 1300mm I have a rough idea of the scale of the machine. In my opinion, you should be using about 13mm thick aluminum plate. I have a machine similar in size with 10mm side plates on the gantry and it is marginal at best for heaving cutting in hardwoods, have not attempted milling aluminum yet.

Chris D

[yamanmax]

Just a quick thought and comment on your design / build.

The side plates appear to be very thin - almost looks like galvanized sheetmetal in the photo. Without additional framing, these side panels, which support everything above the table are a prime area of problems. They simply would not be stiff enough to provide rigidity for anything above basic engraving. The side loads (along the 800 mm axis) would cause substantial flexing on those panels.

Seeing that X axis is 1300mm I have a rough idea of the scale of the machine. In my opinion, you should be using about 13mm thick aluminum plate. I have a machine similar in size with 10mm side plates on the gantry and it is marginal at best for heaving cutting in hardwoods, have not attempted milling aluminum yet.

Chris D

thanks for your quick replay
yes you are correct it's sheet metal galvanized 2 mm because as I mentioned in last post

( The Sheet Metal For Y axes Just for Test Because I Still Waiting for SBR16LUU)
I will put Aluminium plate 6061 25.4 mm THK

[Chris D]

Ah, very good!!!! Beyond that, your design looks robust, it should be a good performer.

Chris D

[yamanmax]

The table Legs has arrived from China
Now I Can start work With Table

[yamanmax]

table adjust leg after I make the Plate and attache with the table

Attachment 367772
Attachment 367774
for legs I bought from alibaba
https://yava.en.alibaba.com/?spm=a27...394.0.0.kBNUD5
The model Number DGT100-20100 price 10$ without Shipping

[yamanmax]

New Update for Y Axis

[yamanmax]

Some Update

[yamanmax]

finally finished the mechanical Part

[fretman_2]

Looking forward to some video of it running!

[jahnj0584]

wow, thats a lot of reinforcement extrusion and plates in the frame of this thing. 30mm Hiwins are going to be overkill on your Z too, so you should have no issues with aluminum once your gantry plates are made from 1/2" or more aluminum instead of sheet metal.

[yamanmax]

wow, thats a lot of reinforcement extrusion and plates in the frame of this thing. 30mm Hiwins are going to be overkill on your Z too, so you should have no issues with aluminum once your gantry plates are made from 1/2" or more aluminum instead of sheet metal.

I'm still not sure until I test it
but I hope so :cheers:

[yamanmax]

Looking forward to some video of it running!

SURE

[yamanmax]

cable chain finally arrived .
now I can work with the control unit

[louieatienza]

cable chain finally arrived .
now I can work with the control unit

NICE!