Re: Milli a new composite mill kit
Originally Posted by
peteeng
Evening all - Thinking through the lifting gantry concept. Here's a big one at NASA. Its a printer but it shows if it was subtractive it would not work unless it had a very very long tool. Since I want to make moulds which can be deep I think the lifting gantry is out and I'm back to the Mazak type arrangement. Peter
https://www.dezeen.com/2021/08/10/bi...re%20exploring
Peter, I don't think this is true.
For deep pocketing, all designs depend on using long tools / holders (gauge length). The spindle nose / head is always a limiting factor and will get in the way regardless of column / Z axis design.
C frame is not really different from lifting gantry in spindle clearance issues.
How much the actual spindle sticks out down below surrounding frame is a factor.
But all spindles are a lot bigger than the actual tool.
E.g. 10mm tool. Spindle nose is 100mm. You are going to need a long tool or a long gauge length holder to do deep pocketing in almost all circumstances.
(Yes, there are a few workpieces where frame design may be more of a factor. If you are machining large parabolas maybe...).
7xCNC.com - CNC info for the minilathe (7x10, 7x12, 7x14, 7x16)