Quote Originally Posted by Zeeflyboy View Post
looks nice, I'd just be a little concerned about how you are going to make the rails work on the gantry? That orientation is going to be very tricky to align within the required tolerances on a steel beam. What was your plan in that regard?
Dear Zeeflyboy,

I hope for a miracle by epoxy

First one needs a zero reference for horizontal level.

I think it was Boyan who explained on the forum he made a reference level surface for this on a concrete floor by pouring epoxy.

I will try this way.
I will spirit level and anker bolt my frame to the concrete floor before pourings so nothing can move and use the x poured epoxy rail mounting surface for this.


Pouring the rail mounting surface for X will be done like the example from a forum member see picture.


like the X axis the 4 mounting surfaces on the gantry will be epoxy levelled.

In 2 steps...

Step 1 I will do the 2 gantry X rail carriage mounting surfaces, and bottom Y rail mounting surface pouring, in 1 go. ( gantry upside down )
There will be an epoxy levelling bridge between the 2 carriage mounting surfaces
Similar to x rail pouring setup


So now those 3 surfaces will be in the same plain.

After curing..

Step 2 The gantry can now be flipped to normal position and top Y axis rail mounting surface can be poured..

Placing the gantry in the normal position on the mounting surface of the x rail should give the best possible reference for a level plain.

After pouring Y bottom and top should be in the same plain..

In theory this should work.


I know this will be a critical process.
When this method fails i will redesign and have the gantry (rail) mounting surfaces milled. nothing much changes only a few pounds of steel added.


When milling is needed i will upgrade the gantry box section to 80x120x8 or 10 to have some meat to mill
I do want to avoid **bolting** the gantry sides to the gantry Y-axis.
I prefer welded solid for best rigidity.
But welding solid must be avoided going that route, because of warping.

I have no friends with a mill capable of box section 1200X120x80.

Would a surface grinder work for this purpose?

Any other thoughts?




Verstuurd vanaf mijn SM-A320FL met Tapatalk