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18-03-2014 #1
Iam retrofitting a lathe with 1900mm Z axis length (1900mm is ballscrew/ways length the length between centers is 1400mm).
The lathe will have 10m/min rapid linear speed on Z axis from a servo 1.8kw 3000rpm with 1:3 reduction (1000rpm).
Two important parameters is critical speed and column strength because the ballscrew will be 1900mm.
Iam between 32mm and 40mm for the ballscrew but iam not sure if 32mm diameter ballscrew has enough column strength at this length and if it would be stable
at 1000rpm. If i put 40mm ballscrew the inertia would be much more because 40mm has the double mass of 32mm ballscrew.
Commercial machines at this length what ballscrew are using ?
What is your opinion ? Iam open to suggestions..
Ball Screw Selection
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