Had a go using motorcalc sheet but does not look right.

[irving2008]

Bob,

Thanks for your kind words.

With big screws running at speed you need to locate the leadscrew axially as well as radially, otherwise there is a lot of force on the motor. Skate bearings are pretty poor axially. You either need a pair of deep-groove bearings or thrust bearings, which are cheaper. The diagram shows a simple bearing block that will hold the skate bearing surrounded by two thrust bearings. The picture shows one of my motor mounts, you can just see the thrust bearing against the cover plate, which on mine is screwed in place though not strictly necessary.

Thrust bearings can be got cheaply from TechnoBots who also have an eBay shop.

[Bob_series1]

I understand what you mean, when you say there is alot of force on the motor. I did design a method to counter act this, however compared to your design it is over complex and thus more likely to fail. I like how yours deals with all the forces on all the axis in one neat solution. My solution was also bulky and thus not very good for use on the z-axis.

Going to order the bits and have a go at building some of them.

Is this your design or a common know configuration? I tip my hat to the designers.

Well that is most items covered for my machine then. I am going to order the bearings, screws and motors, start a build thread and once it is all together I was going to buy the Driver boards etc.. at the end.

Thanks for putting me in the right direction!!!!!!