Hello,
I was going to buy a small machine, But I decided to gain more experience by building my first machine.
I have little experience with building process . All my knowledge I have is from reading & reading.
My machine work area should About 1500MM x 1000MM, I'll cut Wood, Plastic & Alum.
I'll use Plywood for body. With Ball screw & Supported rails.
I'll order the ball screws & rails from linearmotionbearings, The most recommended seller on CNC Zone.
Motors & Drivers from automationtechnologiesinc
For the driver, I'll use Gecko G540.
For motors, I'll dual drive the Y axis from both sides.
But what is better for motors, a NEMA23 425oz/in 2.8A Or NEMA23 381oz/in 3.5A, which one will better for my build, A higher current of higher oz.
And about motion system. which should be larger, The ball screw or the rails. Chai have some packages that have ball screw larger than rails & the opposite. Hi didn't specify the end machine dimensions.
I'll use RM2005 for X & Y with 20mm rails & RM1605 for Z with 16mm rails.
So, If I ordered a 1650 mm length ball screw with end machined, What is the rail length should be.
I got a offer from him as following :
2 SBR20mm x 1650mm length rail with 4 bearing blocks
2 SBR20mm x 1150mm length rail with 4 bearing blocks
2 SBR16mm x 750mm length rail with 4 bearing blocks
1 RM2005 x 1550mm ball screws end machined
2 RM2005 x 1000mm ball screw end machined
1 RM1605 x 650mm ball screw end machined
4sets BK/BF(3sets BK/BF15+1set BK/BF12)
Is this normal that rails longer than ball screw ?
Thank you all