motors on which end of screw

[Jonathan]

float back n forth effectively causing backlash

Just in case Dean reads up on this it's generally referred to as end float, and often mistaken for backlash.

Knowing the machine you intend to build I think you'll find it's not designed to take 2 angular contact bearings like I describe but a single STD bearing

STD bearing, is that 'STanDard' bearing? If it's the one of the two screws I think it is then it's one of two cases. Either thrust bearing and standard bearing, or a double row angular contact bearing or pair of thrust bearings.

[JAZZCNC]

STD bearing, is that 'STanDard' bearing? If it's the one of the two screws I think it is then it's one of two cases. Either thrust bearing and standard bearing, or a double row angular contact bearing or pair of thrust bearings.

Yep STD in my world means Standard.! As in STD Deep grove bearings.

Believe the screws are the ones you sold him so you should know best which they were machined to use.?

Thou to be honest I was just trying to make him aware one end needs to be fixed with a simple example of a cheap way to do it. . . .(Knowing because I cut some bits for him that they didn't look like they were designed for 2 bearings.? )

[Jonathan]

Believe the screws are the ones you sold him so you should know best which they were machined to use.?

Thought it might be those. Have a look at the first post in my build log to see how I did the shorter screw with a single thrust bearing and 'STD' bearing:

http://www.mycncuk.com/forums/showth...outer-building...

I did the Y similarly but with two thrust bearings. Easier to use double row angular contact. Didn't I include some bearings / mounts with it? I forget...

[deannos]

Thought it might be those. Have a look at the first post in my build log to see how I did the shorter screw with a single thrust bearing and 'STD' bearing:

http://www.mycncuk.com/forums/showth...outer-building...

I did the Y similarly but with two thrust bearings. Easier to use double row angular contact. Didn't I include some bearings / mounts with it? I forget...

hi Jon,

Yes your memory is correct and you did supply bearings and mounts for X and Y axis. In my original question i actually meant fixing the X axis motor to the other end of the table