The day has come and I have finally started my 3-axis Gantry router build. I've been lurking on the forum for too long now and its time to do this. Firstly thanks to all the forum members who have contributed to the design - Jazz, John & HiltonSteve who inspired me with his build all those years ago. Attached are some 3d renderings and pics of stuff. Currently doing lots of drilling holes and counterboring in ali strip and plate for the bolts etc.
Basic machine specs are:
3-axis 1100 x 700 x 300 ballscrews.
SBR20 on X SBR16 on Y & 7
Frame from 80x40mm heavy and intermediate extrusions (2.8 and 4kg/m)
Plate - Gantry sides 20mm cast plate 5083
Z axis - Tooling plate cast 5083
Frame Ends 15mm plate 6060
3.1Nm Steppers CNC Kit 1 from Zapp
Photos taken in a unit my neighbour has - did'nt trust the runout on my pillar drill with M8 clearance drill.
Watch this space for more pics as build progresses
looks like you have it all worked out, and plenty of space & a kettle!!. Keep the pictures coming..
Should be a nice little build that. Looking forward to seeing it come together, keep us posted.
Nice little wood cutting machine. Don't forget the energy chains. You might just fit one under the X rail on a shelf bolted to the extrusion.
With the single ballscrew on X try to cut jobs on the centre line of the machine to reduce racking.
That said I wouldn't use single screw for cutting aluminium or really deep DOC cuts in hardwoods as then there is potential for some racking.
There is just enough room for energy chains between profiles but needs certain size. It also doesn't need a shelf as nearly half the chain can be supported or bolted to the profile and the remainder easily handles the weight of cables etc.
If thats the case then sure you must have accounted for the gotcha's that I see and encountered.!!
Sorry to be so tardy with postings and updates but I have been working on this. One of the things you discover when building a CNC from extrustions is the amount of drilling and thread tapping you have to do! Thanks to my neighbour who is a retired tool maker, he advised that I use spiral taps and these are brilliant when used in an electric drill! My top tip of the day! Attached are some photos of progress. You can see how the L-shaped Y axis inspired by Jazz was done. I have recently completed the drilling of the "thickner plates" which are used to mount the round supported rails because the material in the extrusions is too thin to directly mount the rails. Also I now need to clear out my garage so that I have space to assemble and check the machine!
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