dual drive x-axis?

[fasteddy]

Sorry everyone, just noticed the thread by Hiltonsteve, 3 below mine, asking exactly the same thing..! There are more than enough answers there to sort me out... Sigh.. Looks like I was wide asleep again!!!

[fasteddy]

Have finally settled on a single motor, single leadscrew, but with extra bearings and rails under the gantry. I know I know... Pictures..! I will try to put a couple of sketches together tonight and post them..

Have listened carefully to everyone's if, buts and maybe's about dual driving and have to agree that a single drive is much less prone to errors, and belts are, in my experience, another added layer of mischief..

But I do think it important to stabilize the gantry as any yaw will not be acceptable. To this end I have come up with a way of using additional track and bearings (as these are so cheap) to give extra guides to the gantry...

Pics later..!