Stell frame cnc 1500X1000. Adjustable table your opinion please

[Boyan Silyavski]

I get it now. Then maybe you could look at my last post in my next build and consider how I am making my gantry http://www.mycncuk.com/threads/6619-...0346#post60346
May be you would like some of mine ideas which i belive will lead to very strong gantry with no overhang and exclusively made from profiles, like the ones you have. That's the best I have come till now.

[ba99297]

Here is my progress the last two days.
Yesterday all the day pass drilling and taping the bed and the table for attaching the bed
Attachment 12913
Attachment 12914



And that is how i end up today



No time to write. It is too late... Sorry
Tomorrow

Thanks


Vagelis

[ba99297]

Today progress
I have to weld the upper 80X80 pieces ( where the rails will rest )
The lower pieces ( over the foots) make i little curve ( nearly 5-6mm ) at the middle as reult of the heating.
So i decided to weld 4 spacers at the corners. Put the upper pieces with spot welding after make everything square and parallel as possible
Here we are
Four spacers 120mm at the corners


Then i put the upper pieces and before i spot weld i try to make everything square. I use the 1160mm pieces (this is th excact distanse that the upper 80X80 pieces should have) that i will use for the gantry, and other parts of the cutting bed to make everything parallel



After having the tubes as parallel as possible i messure the excact distnace and cut the rest of the spacers. Then i spot weld from the middle to the corners. After everything was in place i start to full weld the table. In order to avoid too much heat i make 2-3 cm welds at a time from one spacer to the other and from the on side to the opposite. So i pass along the table 20-55 times( welding and cleaning the welds). In order to have better welding results i rise the table to have better angle

End of the day and after turning the table upside down to full weld all the sides, i think the result is more than acceptable

0.0-0.1 radius ( messured at different spots) the offset between the upper rails and the vertical pieces.
This offset will be zero after epoxy ( ...i hope so )


Next step is to make the tuning foots. That is why i weld a 80mm piece at every leg with a hole in the middle to pass the m18 bolt.

Then the epoxy method will take place

Till now i think it must be nearly 200 kgr. The winch save me from a lot of work
Thansk for your comments
P.s Do you think that the legs should be connected at the lower part of the table?

Vagelis

[EddyCurrent]

Looking good, I think the legs are okay as they are. Make sure you paint the frame before doing the epoxy, it's a lot easier, but leave just the top surface of the upper rails bare metal so the epoxy sticks good.

[Boyan Silyavski]

Starts to look very impressive. Nice job. I envy you for your big and nice looking workshop.


-In my opinion you don't need to adjust the table by bolts. The machine needs to be sturdy at earth level. I plan to buy for mine 6 hockey plucks. That's what my friend did and works like a charm. Not needed, but he is a maniac.


-if you follow what Eddy said and paint it, may be don't paint also where the ball screw end supports will be. When the gantry is mounted, then fix the ball screw, then go to one end and then tack solder the fixture for the end support, then go at the other end and repeat. Then remove the ball screw and then solder it carefully there. So when all is ready in the same manner you rectify the ball screws. Cause if you solder now, later may be there would be need to re drill the holes and waste a lot of effort. That's my way of course.

[ba99297]

Thanks both for your valuable advices.
Syliavski when you say NOT to adjust the table by bolts, what if there is any imperfection 1cm at the floor ? The hockey plucks that you suggest will be welded at the frame. What material are made of these plucks?
When you are talking about the balscrew fixture end support, you are talking about X axis? If you see my plans i am going to attach the fixture to the frame with bolt so it will be adjustable.
As for my work shop thanks for your comments. There is my paradise. Music, creation, and no one to bother me.

[EddyCurrent]

As for my work shop thanks for your comments. There is my paradise. Music, creation, and no one to bother me.

Nice, where I am it's mostly pissing down with rain.