Hi,
Yes you could but it may reduce the rigidity of the axis also and that would be a crying shame to make the mill LESS capable than before you did the 'upgrade'.For X axis leadscrew length is 1400mm 32mm diameter.
because replacement 32mm ballscrew is a bit costy can i use 25mm ballscrew?
5mm pitch ballscrews result in high accelerations and high thrust, both very desirable, but require high rotational speeds to get fast linear speeds.
10mm pitch ballscrews result in less thrust, often lower accelerations but the machine will be faster for a given servo speed.
My own design mill is about 800kg, so rather smaller than yours but I use 5mm pitch 32mm diameter ballscrews direct coupled to 750W servos. It can do 25m/min...which
is much faster than I am comfortable with, can do 0.27g accelerations at rated torque and 0.75g as a temporary overload, all in all, scary fast.
The trick here is not to rush in and buy this or that, but to do the momentum calculation so you know how its going to work out before you spend a cent. Real easy to make
a decision about servos say only to find they are not really suitable......and you've wasted countless dollars.
The bigger question is what grade of ballscrew do you want....cheap C7's or ground C5's or even better C3's?. Ground ballscrews are ten times the price of
rolled screws but will determine what sort of accuracy your machine can achieve.
Rotating ball nut designs are for much MUCH bigger machines and are eyewateringly expensive, don't go there! Rotating screw is what you want.Rotating ballnut design or rotating ballscrew?
Yes it probably is powerful enough, depending on gearing and ballscrew pitch...but I think you risk painting yourself into a corner. If you are going toI have a servomotor 500w 800rpm(is 8000rpm with 1:10 backlash free reducer) is this power enough or need something more powerfull ?
convert a machine to CNC you will have to buy servos, get used to it. What you should not do is try to re-use a marginally suitable servo to save a few hundred dollars
only to find that you have compromised the overall result. A CNC conversion is expensive, but provided you don't make any missteps or bad compromises then your
machine will come to life and be worth every cent you invested in it. I would suggest that you should budget on three servos in the region of 750W to 1.5kW, which depending on the brand (does
not include el-cheapo Chinese made) are $500-$1000 each.
Cannot see any photos.
Craig