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19-01-2018 #1
All I can say is that my welding was a little better at the end than at the beginning! Well, at least, not quite as bad If it encourages other people to have a go, I have been successful. Two weeks experience with a welder is not the same as a long training course and years of experience. But you can still do it!
Yes, I have done a very little cutting in aluminium. However, it was one very small component and although I managed to cut it, I didn't have any way of clearing the chips properly, I didn't use any lubrication, I used a small cutter with four flutes, and the cutter broke towards the end of the cut. This was probably because the flutes became clogged. This was not a good test of the machine because all the problems came from choice of cutter and other issues which were nothing to do with the machine. I want to try cutting aluminium properly, with correct speeds, feeds, and cutter choice, and maybe some lubrication this time! But I have too many projects in wood at the moment so haven't had time to try much else. I think that the machine should be capable of reasonable performance in aluminium, so I am still optimistic until proven otherwise!
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20-01-2018 #2
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20-01-2018 #3
Very simple. The linear bearing carriages are bolted to a 12mm aluminium plate with cap screws in counter-bored holes so that bolt heads are below the surface. In effect, I then have a linear bearing skate. The bearing carriages are aligned to the rails before being finally bolted up tight (just run the "skate" backwards and forwards a few times before tightening screws). The "feet" of the gantry sit on pads of epoxy paste for leveling (as described earlier) and are held in place by three bolts at each end of each foot. These go through the base of the foot box section into tapped holes in the aluminium plate. Two bolts are near the end of the foot and one further in, carefully positioned so that you can get more than 60deg swing with an allen key in order to tighten it.
Does that help?
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