Monster fixed gantry router for aluminium & wood

[JAZZCNC]

Hi Jonathan,

This would work well and I've considered something similar my self but space is my ruler so decided 150x150 steel box section filled with sand is better for me. I've actually got the steel it's cut and waiting just need time now but there will be a thread created when build starts.

Regards your questions then here my opinions/suggestions.
#1 You need to clarify what you mean by carriages.? Do you mean carriage plates the bearings fasten to IE: Plates which carry Z axis and run along gantry.? (this would be classed has X axis on fixed gantry)

#2 Do you mean 100mm Z axis not 10mm.? Either way then DONT use unsupported rail of any kind.
Supported round rail is the minimum and really if your after a monster machine then you want profiled linear rails.

#3 See above but if you only had enough for one axis then make it the Z axis has this is the most important has it takes all the cutter forces. Next would be the moving table (Y Axis) but Again really you want profiled on all axis for a proper machine.
15mm rail would work ok but 20mm would be better has the bearing blocks are larger and will give better support, use the wide type for moving table has they give best mounting and support.

#4 Front face

#5 Nope not me sorry but I'm sure you'll easily get upto 1.5mtr or so before it's own weight starts having an affect. There will be some specs somewhere that shows it I'm sure.

Here's some other things to consider regards Cutting Ali.
The 2.2Kw spindle won't cut great big lumps with larger cutters so if your wanting to shift large amounts of material with larger size cutters (above 8mm) then you'll need more HP/torque.
Also you want flood cooling so work that into design, you'll need to seal concrete.!!

[~andy]

On a practical note, the concrete in these lintels can be a real bugger to drill and you have will have to avoid the steel inside.

I'd go with steel box section, filled with sand, so that you can break the machine down to move it.

You are going to need to build a decent table to support this monster anyway.

[dazza]

i had a crack at a fixed gantry 400x400 mm work area,i,ll be pulling it apart soon and upgrading a lot of it.
i noticed your gantry is positioned on the halfway point of the bed but it will look very different once you factor in how far the z setup/spindle and mount pertrude,you want the center of the spindle to be at the halfway point of the bed.

[JAZZCNC]

i had a crack at a fixed gantry 400x400 mm work area,i,ll be pulling it apart soon and upgrading a lot of it.

That's a nice capable looking machine you built there Deisel can see there's some thought and care gone into it . .

Out of interest what you going to be upgrading.? The upgrade would make a good thread and this place is in need of some build or re-build threads so do use all a favor and post about it please.!

[dazza]

That's a nice capable looking machine you built there Deisel can see there's some thought and care gone into it . .

Out of interest what you going to be upgrading.? The upgrade would make a good thread and this place is in need of some build or re-build threads so do use all a favor and post about it please.!

cheers i wish id had a bit more patience though, changes.
the x axis is being stripped down
plan is to completely sheet off the bed like the one in the image below ,then 1 big 20 or 30mm thick plate running down the centre that will be slotted to take the slightly longer 20mm rail (that ive got to order),i should roughly get an extra 200mm of travel.

y axis im scrapping and starting again too much to list on the lads thread,so a new thread sounds like a plan ta

[Boyan Silyavski]

IMHO you should decide on bigger spindle and stronger supported rails, at least 20 size. And base your design on these and further develop it, not the other way around.

If i was building a monster machine and was tight on money, i would look at ebay for used roller linear guides in good condition. When i finish my current build, my next one will be a monster, so that's my conclusion after continuous research.