Hi!
I thinking of buying a used ballscrew for an ok pric but it has a pitch of 20 mm. Will this cause a problem in accuaracy? The Z have a pitch of 10 mm and the y a pitch of 5 mm.
Will it be the same to put a 1:4 gear ration on the x (pitch of 20) and 1:2 for the z, then all 3 will be down to a pitch 5, or am I wrong?
Would be greate with some ideas.
Thread: 20mm pitch to big for cnc?
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07-28-2007, 05:15 PM #1
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20mm pitch to big for cnc?
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07-30-2007, 04:08 AM #2
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Where accuracy is concerned it will be down to the quality of the screw and the lead error. Other than that your thinking seems to be fine to me.
John
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07-30-2007, 10:10 AM #3
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As John said it should be fine, so long as your servo's/steppers can drive the screw, and you will get great rapids.
I have my eye on a 25mm/turn screw, and am thinking of going 8:1 reduction.
Russell.
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