New CNC Mill on the horizon

[Jonathan]

Is this a common thing? and how does one go about straightening them ?

I've got round it in the past by ordering ballscrews and rails at the same time, since the rails add sufficient strength to the package, but if you're getting the rails elsewhere that's not much use.

How long are the bent ballscrews? You can try clamping it between V-blocks, and pushing down in the middle to bend it back... but it's not going to be easy.

[fvfdrums]

I've got round it in the past by ordering ballscrews and rails at the same time, since the rails add sufficient strength to the package, but if you're getting the rails elsewhere that's not much use.

How long are the bent ballscrews? You can try clamping it between V-blocks, and pushing down in the middle to bend it back... but it's not going to be easy.

Rails already in my possession but ill keep that in mind for the future!

I am going to put it in my lathe later and try and measure how far out it is. But any ideas greatly appreciated

[JAZZCNC]

My stuff arrived today has well, wonder if they came on same shipment.? Don't know if dare say this but my stuff is ok but I did have other stuff which supported the screws plus they where only 1300mm long.

Depending how bent then like Jon says V bollock and plenty of force, I've straightened screws before but it's slow process and easy to over do and bend more.
If not too bad then I'd fit on machine and see how they perform, sometimes they can be ok when running and not affect machine too much.?? . . .they can also shake the bastard to bits but worth a try.!!

[fvfdrums]

My stuff arrived today has well, wonder if they came on same shipment.? Don't know if dare say this but my stuff is ok but I did have other stuff which supported the screws plus they where only 1300mm long.

Depending how bent then like Jon says V bollock and plenty of force, I've straightened screws before but it's slow process and easy to over do and bend more.
If not too bad then I'd fit on machine and see how they perform, sometimes they can be ok when running and not affect machine too much.?? . . .they can also shake the bastard to bits but worth a try.!!

Mine are only 1050mm long but it was just the 4 ball screws bk12 holders and the ball screw holders in the one package covered in yellow tape and a sprinkling of bubblewrap. Oh well hopefully they are not as bad as they feel but I have a horrible feeling :|

[njhussey]

My ball screws from Chai were wrapped in plastic, encased in foam and wrapped in a cardboard square tube/box which was liberally wrapped in yellow tape. Not checked mine yet to see if they're straight....might be doing that sooner rather than later now!!