New build - Steel - 3 Axis initially then conversion to 4 axis.

**routercnc** · 14-06-2016

Looking good so far Dave.
Any reason for the 2005 ballscrews? The 1605/1610 are more popular because they have lower inertia which helps with the acceleration and deceleration, especially on the modest 48V you are using.

**Slixxor** · 15-06-2016

Originally Posted by routercnc

Looking good so far Dave.
Any reason for the 2005 ballscrews? The 1605/1610 are more popular because they have lower inertia which helps with the acceleration and deceleration, especially on the modest 48V you are using.

I havent purchased the PSU yet. so may go larger. the motors claim to have a max voltage of 48v. i can get a 60V no troubles but am not sure of the impact that would have on the steppers. As far as the RM2005's goes, i was aiming for a rigid setup for cutting aluminium and didnt want any wobble from ball screws. Feed rate isnt that critical for me.

**Clive S** · 15-06-2016

Originally Posted by Slixxor

I havent purchased the PSU yet. so may go larger. the motors claim to have a max voltage of 48v. i can get a 60V no troubles but am not sure of the impact that would have on the steppers. As far as the RM2005's goes, i was aiming for a rigid setup for cutting aluminium and didnt want any wobble from ball screws. Feed rate isnt that critical for me.

I wouldn't be worried about the steppers but the drives in your spec you have said that you are using these M542H If I am not mistaken the max voltage they will handle is 50V so 48V would be too high for them. AM882 drives would be a better choice running at about 68-70 V.

If you want a decent machine you have to have decent electronics.

**Slixxor** · 15-06-2016

Originally Posted by Clive S

I wouldn't be worried about the steppers but the drives in your spec you have said that you are using these M542H If I am not mistaken the max voltage they will handle is 50V so 48V would be too high for them. AM882 drives would be a better choice running at about 68-70 V.

If you want a decent machine you have to have decent electronics.

Ok, it's now being considered. :) havent bought the drivers yet either. you are right indeed, my voltage restriction was the M542H. price is only AU $20 more per driver.

**Clive S** · 15-06-2016

Originally Posted by Slixxor

Ok, it's now being considered. :) havent bought the drivers yet either. you are right indeed, my voltage restriction was the M542H. price is only AU $20 more per driver.

Ok then if you have not bought the motors either then try and find 8 wire so they can be connected in parallel and get the lowest inductance motors you can find these are proved and tested by many over here :- http://cnc4you.co.uk/resources/Stepp...1B%203.1Nm.pdf.

Good luck with the build.

**Slixxor** · 15-06-2016

Originally Posted by Clive S

Ok then if you have not bought the motors either then try and find 8 wire so they can be connected in parallel and get the lowest inductance motors you can find these are proved and tested by many over here :- http://cnc4you.co.uk/resources/Stepp...1B%203.1Nm.pdf.

Good luck with the build.

I have the motors already and all mounting hardware. saving the electronics for last. The AM882's are in the price range. I am running dual ballscrews on the X Axis. so additonal cost. but oh well :)