Im new, am a 3D designer. Need a New cnc machine and need advice and guidance

[FlyHighRC]

I have spent allot of time on the build logs so far. Im seeing allot of parts that require a mill and to me that dsrives up cost and complexity. Im sure it increases strength but above my computer I have K.I.S.S which is proving handy :D

A couple questions where I cant seem to find the answer..

When the epoxy is applied to the steel and sets, to bolt on the rail im assuming you just drill and tap? otherwise that must be a very fiddly job getting all them nuts down there haha

carriage space seperation, Is there an optimum distance between the bearings? im assuming the further apart the better but that obviously reduces work area so i guess there is a happy medium somewhere, right?

[njhussey]

I have spent allot of time on the build logs so far. Im seeing allot of parts that require a mill and to me that dsrives up cost and complexity. Im sure it increases strength but above my computer I have K.I.S.S which is proving handy :D

If you made the gantry out of steel or Ali extrusion you wouldn't need a mill.

A couple questions where I cant seem to find the answer..

When the epoxy is applied to the steel and sets, to bolt on the rail im assuming you just drill and tap? otherwise that must be a very fiddly job getting all them nuts down there haha

Depends on the thickness of the steel. If you've read Eddys build log you'll see he glued in 6mm flat and drilled and tapped into that...

carriage space seperation, Is there an optimum distance between the bearings? im assuming the further apart the better but that obviously reduces work area so i guess there is a happy medium somewhere, right?

Pass...i settled on 200mm as a good compromise between losing cutting area and strength...



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[FlyHighRC]

Thanks, I prefer the epoxy method thatn gluing some flat bar onto the frame... Purely because it sounds simpler :) Thanks on that! I was thinking nuts inside the box section would be very tedious...any special taps Id need for steel? I have a set of taps but arent made for steel...

In terms of what i said about a Mill, I was talking more along the lines of motor mounts, Even saw one guy with a very nice machine who had his whole gantry cut by laser...

[Clive S]

When the epoxy is applied to the steel and sets, to bolt on the rail im assuming you just drill and tap? otherwise that must be a very fiddly job getting all them nuts down there haha

I used 5mm box section and drilled and tapped through the epoxy post 6 here:- http://www.mycncuk.com/forums/gantry...st-router.html is the epoxy being poured. Eddycurrent has used a similar system but he glued a flat plate with gorilla glue inside the box section to give more of a bite for the threads. ..Clive