Thread: 1200mmX900mmX170mm 4axis cnc
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02-08-2017 #21
Hello !
I think you (or me) has misunderstood..
The bearings on x axis your long axis should be wider preferably so that the tip of the cutter is between them when viewing the machine from the side.
The y axis bearings on gantry can be closer.
If you use 90x90x4 steel with no welding, how will you close the ends to be able to bolt there?
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02-08-2017 #22
How close can be the bearings on the gantry so I can have good accuracy and eliminate the tolerance when torgue applied on Z axis ?
The ends of the tubes is going to be welded with steel flanges, I prefer minimum welding for minimum stress and to be able to adjust- align everything.Last edited by Nickhofen; 02-08-2017 at 09:54 PM.
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02-08-2017 #23
Aah then I understand about the ends ;)
I don't know about the critical spacing of y axis bearings but I've seen lots of people using gantrys that are only 100mm high (50x100 steel tube) and that seems to work. The better question is what distans you are planning from lower y bearing to workpiece?
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03-08-2017 #24
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03-08-2017 #25
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04-08-2017 #26
Hohoho you know the phrase "seek and you shall find". Well done ;)
But if I remember correctly my choice was 80x160 profile for gantry but jazz and Boyan stated that 2pcs of 80x40 is plenty enough in L formation. That gives the gantry a hight of 120mm!
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04-08-2017 #28
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..Clive
The more you know, The better you know, How little you know
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The Following User Says Thank You to Clive S For This Useful Post:
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04-08-2017 #30
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