To big steppers?

[njhussey]

Machine size is about 600x900 inside the frame. 2 RM1610 screws at X and 1605 at Y and Z. The x axes will be slaved by belt and a larger motor.
I want to be able to work with alu as good as possible with this gear. The router is a Makita 700 something...

My router has an inside area of 970 by 500 and I use an 8Nm Nema 34 driving twin 1610 ballscrews via a belt (I'm using a 230V driver not an AM882 to get the speed) in my X, Nema 23s on Y and Z with Y having a 1610 and Z having a 1605 ballscrew driven by AM882 drivers...it munches MDF and I have it at 7500 m/min plus for cutting plastic such as Acetal....I also use the IP-M and its a great piece of kit.

Your belt will be more like 2m to 2.5m long with a cutting area you're looking for.

[JW1977]

My router has an inside area of 970 by 500 and I use an 8Nm Nema 34 driving twin 1610 ballscrews via a belt (I'm using a 230V driver not an AM882 to get the speed) in my X, Nema 23s on Y and Z with Y having a 1610 and Z having a 1605 ballscrew driven by AM882 drivers...it munches MDF and I have it at 7500 m/min plus for cutting plastic such as Acetal....I also use the IP-M and its a great piece of kit.

Your belt will be more like 2m to 2.5m long with a cutting area you're looking for.

Thanks! I went through your build log, nice work!
I’m also into RC and are really looking forward to get the machine ready.
After all the input from you and others here I will probably go for the IP-M and I will slave the X by belt.
About the belt and pulleys . Can you recommend any products? If I remember correctly the distance between the centers of my ball screws is 684 mm at X.
I was figuring twice that + a little for the pulleys and some kind of tension adjustment device at center.

[JAZZCNC]

Can you recommend any products? If I remember correctly the distance between the centers of my ball screws is 684 mm at X.
I was figuring twice that + a little for the pulleys and some kind of tension adjustment device at center.

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.

[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 . .