To big steppers?

[JW1977]

It will depend on how you setup the tensioning system and idlers. But with 20 teeth pulleys which is good size because gives nice balance of teeth engaged and pulley size which affects inertia of the screw and can have big affect on power requirements. Arranged something like whats in the picture then your belt length will be in the region of 1600mm.

Yes, something like that.
I liked the principle of this one...

[JAZZCNC]

Yes that way works ok and I've used similar setups my self in past but ideally you want to reduce the amount of idlers to minimum. So if you have no restrictions to where motor goes etc then other way is slightly better. Less friction, less to go wrong.

[JW1977]

Yes that way works ok and I've used similar setups my self in past but ideally you want to reduce the amount of idlers to minimum. So if you have no restrictions to where motor goes etc then other way is slightly better. Less friction, less to go wrong.

Yes, you’re right. One pulley is a better solution… But the symmetrical one looks nicer…

[JAZZCNC]

Yes, you’re right. One pulley is a better solution… But the symmetrical one looks nicer…

Both look the same after you put cover over them to protect . .