Rubber Bands to reduce rod play

[JohnOCFII]

I've seen numerous mentions of using rubber bands at the spider-end of the diagonal rods to reduce play.  Are they necessary or beneficial at the carriage-end of the diagonal rods?  I have a little side-to-side play, but nothing so great that a washer would fit.

Thanks,

John

[uzi3l]

be mindful of the washers you use at the time i should not find any that would fit that didn't effect the range of motion if the bearing end.
oh and yes i used rubber bands for both ends on stock rods, but can't really say if they helped as i had other problems with printer and couldn't print a lot wit this before i broke and replaced the rods.

[JohnOCFII]

Jan 15, 2016 9:44:40 GMT uzi3l said:

be mindful of the washers you use at the time i should not find any that would fit that didn't effect the range of motion if the bearing end.
oh and yes i used rubber bands for both ends on stock rods, but can't really say if they helped as i had other problems with printer and couldn't print a lot wit this before i broke and replaced the rods.

Thanks for the information.  At this point, I think I'm just procrastinating, and should finish the build and try printing!

[piscanc]

Bands are used to minimize play left in the rods themselves.
Its same as rod holders but smaller. It can cause steps in round surface prints,but if band is too weak, it's useless at high speeds since accelerations on direction changes overpowers them.
If they are too strong they cause additional friction and parts wear out quicker.

Some are using clips instead.
But mostly its used in different joint design and low quality parts

[phervier]

Jan 14, 2016 13:25:16 GMT JohnOCFII said:

I've seen numerous mentions of using rubber bands at the spider-end of the diagonal rods to reduce play.  Are they necessary or beneficial at the carriage-end of the diagonal rods?  I have a little side-to-side play, but nothing so great that a washer would fit.

Thanks,

John

There is two reasons to have a side-to-side play !
- bad quality of the bearings, half of mine have a noticeable axial clearance. For that you can't do nothing but change your rods

- the thinner part of the rod-end bearing holder is too long. You may noticed that if even with the Round head screw completely tighten the ball of the bearing may move a  little. To reduce that, there is an easy solution. You may file the holder to reduce its length. In my case a 0.3mm reduction was sufficient (it is just about 30 kick of file). You have to repeat this operation on one end of each of the 12 holder. This will greatly reduce the tilt of the spider.

Attachments:

[JohnOCFII]

Feb 16, 2016 15:35:10 GMT phervier said:

- the thinner part of the rod-end bearing holder is too long. You may noticed that if even with the Round head screw completely tighten the ball of the bearing may move a  little. To reduce that, there is an easy solution. You may file the holder to reduce its length. In my case a 0.3mm reduction was sufficient (it is just about 30 kick of file). You have to repeat this operation on one end of each of the 12 holder. 

Thanks for the details and photos.   I think I should file down my rod holders.  3 of the rod ends have some play.

[mjmarino]

Thanks for the information on lateral play as checked and there was some on most the arms. That fixed and haven-t even started calibrating yet so that should make things go a bit more smoothly.

Michael

[corbett]

Jim Corbett National Park lies in Uttarakhand. It's the whole area surrounded by hills,
rivers, grasslands and a large lake. There are so many resorts allows overnight stays in the National Park. you can check out now at
Jim Corbett Resorts