Smaller frame, same travel, which of these two frame and bearing constructions ?

[vroemm]

Hi..

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(btw. how can i show the picture in full size in the message ?)


I want to make a cnc router frame.
With as big as travel as possible.
Problem is the frame should go through the door of my hobby room.

I came up with a other way to make the frame and linear bearing construction.
With the linear slider bar fixed to the bottom of the work table, instead of to the frame..
And the bearings to the frame of the cnc router, instead of to the work table.
After removing the work table the frame will be much smaller.
And fit through the door of my hobby room.

Which one is the best of these two ?
Both have the same travel lenght.

Thanks :-)

[lerman]

A also has the minus that the linear rails are exposed to swarf and damage.

Ken

[harryn]

I have more or less the same challenge / goals.

My limits are that it needs to go through a door, fit into the back of the mini van, and fit into a fairly small spot ( approx 0.8 meters on a side). For mine, I am going to try to make the "table" vertical instead of horizontal. This makes the unit shaped more like a refrigerator with the table on the back wall, and the X rails on the "sides".

I have started a "build thread" although "planning thread" might be closer to reality. I would be curious what you think of it.

[Zumba]

The first one. The second one requires a very heavy base, thousand pounds at least.

[vroemm]

My limits are that it needs to go through a door, fit into the back of the mini van, and fit into a fairly small spot ( approx 0.8 meters on a side). For mine, I am going to try to make the "table" vertical instead of horizontal. This makes the unit shaped more like a refrigerator with the table on the back wall, and the X rails on the "sides".

I have considered this shape to.
Loved to have a cnc router which can take work pieces as big as a door :-)
My problem with it is sound proofing, it would need a hugh sound proofing box.
To big for my hobby room.

[harryn]

The vertical design can be adjusted (depending on your needs) to do a door. Most doors are 32in or less, at least here in the US, so that becomes the vertical range of your router.

If you think of the axis as being
- X = vertical
- Y = horizontal = parallel to the back wall
= Z = horizontal = drilling into the back wall

The idea is to lay the door down on its long side, and load it through a slit so that the 32 inch is with the X from the side. I am hoping to mill the panels in "sections" - sort of a mill and step over arrangement.

The enclosure is fundamental to the design - it is a big hollow box.

Good luck.

Harry