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Sterob
12th Jun 2016, 02:12 PM
I bought a X6-1500GT cnc router 2 years ago and have recently developed a problem with the y axis ball screw.
I is free in one direction but it binds in the other direction.
I have ordered a new one but will pull the old one down to try and find the cause of the problem.
Has anyone come across this sort of problem before?
Steve

RayG
13th Jun 2016, 02:44 PM
I bought a X6-1500GT cnc router 2 years ago and have recently developed a problem with the y axis ball screw.
I is free in one direction but it binds in the other direction.
I have ordered a new one but will pull the old one down to try and find the cause of the problem.
Has anyone come across this sort of problem before?
Steve

Is it the ball screw or is the mounting? if it only binds one way it might be the mounting at one end.

Ray

Sterob
13th Jun 2016, 02:47 PM
Its the Ball Screw. I pulled it out of the machine.

RayG
13th Jun 2016, 03:09 PM
Only at one spot, or does it bind in all positions along the length?

Ray

Sterob
13th Jun 2016, 05:10 PM
It appears to be binding along the whole length as the stepper motor looses steps along the whole length.
Its too hard to wind the ball nut, by hand, for the whole 700 mm...lol
Steve

RayG
13th Jun 2016, 05:32 PM
It appears to be binding along the whole length as the stepper motor looses steps along the whole length.
Its too hard to wind the ball nut, by hand, for the whole 700 mm...lol
Steve

Hi Steve,

Sounds like the balls only like recirculating in one direction, so that might point to the recirc tube. Any signs of damage to the tube?

Ray

Sterob
13th Jun 2016, 05:52 PM
I have not removed the screw nut as i wanted to find a replacement. One is on its way so when I get a chance ( Im on the road atm ) I will pull it down and post some photos.

Weird that the balls only like moving one way. ....maybe some swarf has been drawn inside...somehow....
Steve

Ryan in Melbour
14th Jun 2016, 05:45 PM
certainly sounds like something has managed to find its way inside the ball nut.

Sterob
14th Jun 2016, 09:57 PM
I pulled the nut off today. ( of course, I lost a couple of balls...grrr....I have 46. I guess I am supposed to have 48 ish ...3 rows of balls..)
I cannot really see a problem although I don't know what I'm looking at. No swarf or bits of metal came out.
It seems a bit dodgy inside the nut but maybe that's how they are supposed to be...lol

I think its going to be a nightmare trying to get them back in...even with a mag lamp......
The balls are 3.18 mm ( 1/8" , so I can get some more. )

362788362789362790

RayG
15th Jun 2016, 01:00 AM
I wouldn't bother putting them back... it's a bit hard to see but that thread looks pretty bad. It should be a smooth track all the way through.

Ray

Sterob
20th Jun 2016, 09:45 PM
My new Ball Screw arrived today.
Good news...Its the right one.....lol
The nut itself looks a little different, so maybe they have changed it for a better design.

The screws appear to have the same finish so I guess the old screw may be ok for a spare, if I need it.

362866362867

Now to find the time to re-install it and ensure it runs smoothly.

Steve

rcaffin
22nd Jun 2016, 09:24 PM
I wouldn't bother putting them back... it's a bit hard to see but that thread looks pretty bad. It should be a smooth track all the way through.
That thread was smashed! Replace!!!
Cheers
Roger

Sterob
22nd Jun 2016, 09:51 PM
That thread was smashed! Replace!!!
Cheers
Roger


Yep...I'm onto it....lol