Back Lash on X

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andy_con
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Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Back Lash on X

Post by andy_con » Fri 30 May , 2014 14:47 pm

got about 0.1mm of back lash on the x table, anyone got any tips to reduce it?

tightened the screw for each gib by about half a turn but didn't make any odds

Martin
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Re: Back Lash on X

Post by Martin » Fri 30 May , 2014 15:20 pm

Tab Nut.

You will need to remove the X axis stepper motor & the Pulley on the end of the Lead screw. You will then see the Tab Nut & Tab Washer. You can push the Tab back then tighten the nut & lock it with the Tab.

andy_con
CNC Expert
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Posts: 171
Joined: Fri 05 Oct , 2012 20:06 pm
Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Re: Back Lash on X

Post by andy_con » Fri 30 May , 2014 15:29 pm

um interesting maybe when I had to change the bearings in the x table I didn't do it up properly.

how tight should I do it?

thanks for the help

andy_con
CNC Expert
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Posts: 171
Joined: Fri 05 Oct , 2012 20:06 pm
Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Re: Back Lash on X

Post by andy_con » Fri 30 May , 2014 16:31 pm

is this normal?

the table moves back and forth pretty easily (and no its not the vice that's moving)

[video]https://www.youtube.com/watch?v=tXiMJb4 ... e=youtu.be[/video]

https://www.youtube.com/watch?v=tXiMJb4 ... e=youtu.be

andy_con
CNC Expert
CNC Expert
Posts: 171
Joined: Fri 05 Oct , 2012 20:06 pm
Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Re: Back Lash on X

Post by andy_con » Fri 30 May , 2014 20:52 pm

sorted the issue above, but here is my 0.1mm backlash issue

https://www.youtube.com/watch?v=nf5j6zR ... e=youtu.be

any suggestions?

Martin
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Re: Back Lash on X

Post by Martin » Fri 30 May , 2014 22:56 pm

TAB NUT!

andy_con
CNC Expert
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Posts: 171
Joined: Fri 05 Oct , 2012 20:06 pm
Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Re: Back Lash on X

Post by andy_con » Fri 30 May , 2014 23:01 pm

lol

tightened the tab nut, but its made no difference

how tight? till it wont turn anymore?

andy_con
CNC Expert
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Posts: 171
Joined: Fri 05 Oct , 2012 20:06 pm
Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Re: Back Lash on X

Post by andy_con » Wed 11 Jun , 2014 22:22 pm

well with a bit of help from tom I started taking the table completely to bits to try work out the problem

although the backlash issue is 100% not the ball screws, the ball screws are very very sticky. turns out the oiler isn't working which could well be the cause.

there doesn't seem to be any play/movement in the ball screws just very sticky (yes I have oiled), so its either leave the ball screws knowing that at some point in the near future they are going to need sorting or doing it now.

the sleeve that's needed to take the threaded bar out, anyone know what one I need and where to buy from? a link would be handy.

Image

also this screw which is for the jib is fooked, I didn't do this it was already like it. anyone know where to get a new one?

Image

andy_con
CNC Expert
CNC Expert
Posts: 171
Joined: Fri 05 Oct , 2012 20:06 pm
Hardware/Software: Triac Vmc with 6 station ATC
Starmills with ATC

Re: Back Lash on X

Post by andy_con » Thu 03 Jul , 2014 12:43 pm

anyone got any tips for tightening the tab nut?

when im tightening the table is moving making it hard to do up tight

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