Denford Triac VMC w/ ATC conversion

[Chaz]

you remove the pulley to reveal the tab nut and tab washer.

fold down the tab washer leg which stops the tab nut from rotating, then you can tighten tab washer.

only way ive found to do it, is to tighten put back together and check back lash, if still there remove everything and tighten even more. back lash should be checked using a test dial indicator

you remove the pulley by undoing the grub screw located in between the teeth

Ye, that's what my poor PM was trying to explain.

[andy_con]

Anywhere where there are angular contract bearings requiredpreloaded and there are two in the end green part of the table

[stallone]

Thanks guys.

This is great. I understand it now. Basically, I am adjusting the ballscrew tighter by the tab nut and tab washer!

[i2i]

Not really, you're adjusting the preload on the pair of angular contact bearings in the green block that fixes the ball screw to the table.

[stallone]

Not really, you're adjusting the preload on the pair of angular contact bearings in the green block that fixes the ball screw to the table.

...the blue ones in the illustration below. I was trying to figure that out.

[i2i]

the drawing doesn't really represent the action, but that's where it is.

[andy_con]

You cannot adjust the ball screw bearings, they are what they are.

When you have an angular contact bearing in your hand the middle wobbles back and forth.

So what your almost doing when you have a pair is pulling the middles together to get rid of that play.

[Clive S]

...the blue ones in the illustration below. I was trying to figure that out.

This drawing is not correct as it is not showing the inner part of the AC bearing