hiwin rail question

[Boyan Silyavski]

Hiwin Lubrication Manual, so you know the proper quantities and other stuff.


Yes, that's what i meant. Drill the rail and inject grease through the rail.

Now in the manual 4.5 they say there is a thing called "Self-lubricating kit ‚E2’ "

[JAZZCNC]

Hiwin Lubrication Manual, so you know the proper quantities and other stuff.


Yes, that's what i meant. Drill the rail and inject grease through the rail.



Now in the manual 4.5 they say there is a thing called "Self-lubricating kit ‚E2’ "

Drilling the rail isn't going to help very much, you may as well just grease the rails for what good it will do. This method will only smear grease on the outer surface of the balls and the rest will come out the ends past the seals, only a very small percentage will get to where it matters. You want grease or lube on the inside of the bearings so it flows thru the circuits and end caps.
Yes it's better than nothing but the pipe and tube method is easy enough and you know the grease is getting exactly where it's needed.

Personally I'd fit a timer lubrication pump and pump oil thru the bearings. Timer pumps from china are relatively cheap now and they can be programmed to pump at regular intervals so you know the bearings are getting lubed and flag up or E-stop the machine if low on oil etc.

[Jonathan]

I don't really see what all the fuss is about, it's just a few tubes and simple parts to make on a lathe? I guess if you've not got a lathe then that doesn't help matters.

In my build log all the bearings and ballnuts are connected with tubes look towards the end of the of the first post in the thread:

http://www.mycncuk.com/threads/6484-...8616#post48616



The Y-axis rails are the same size as yours.

[Neale]

Jonathan - am I correct in thinking that all the oil pipes go direct to the sliding carriages/ball nuts? Presumably you also had to be careful about routing pipes and allowing enough slack for movement.

And for anyone who does not want or does not have the facilities to make the components, Arc Euro Trade (and probably plenty of other places) sell all the bits. I have a central lubrication system on my vertical mill, and it does mean that the slideways get lubricated much more often than when I had to do it all manually. It's a thought...

[EddyCurrent]

I don't really see what all the fuss is about, it's just a few tubes and simple parts to make on a lathe?

That's fine if you use oil, but I'm on about grease. Tell me this though, does the oil drip about all over the place ? it's okay for you people who cut metal but I'm cutting wood and the last thing I want is oil contaminated wood, that's why I use grease.

[Jonathan]

Jonathan - am I correct in thinking that all the oil pipes go direct to the sliding carriages/ball nuts? Presumably you also had to be careful about routing pipes and allowing enough slack for movement.

Yes and yes, but slack for movement doesn't present much of a challenge as the only pipes that move are the two connected to the gantry, which can be routed with the Y and Z axis motors. The challenge is when you have rotating nuts...

That's fine if you use oil, but I'm on about grease. Tell me this though, does the oil drip about all over the place ? it's okay for you people who cut metal but I'm cutting wood and the last thing I want is oil contaminated wood, that's why I use grease.

If you put plenty of oil in then yes, it goes everywhere. Perhaps it could be managed with more careful control of the quantity.

[JAZZCNC]

That's fine if you use oil, but I'm on about grease. Tell me this though, does the oil drip about all over the place ? it's okay for you people who cut metal but I'm cutting wood and the last thing I want is oil contaminated wood, that's why I use grease.

If you over fill with grease it comes out and the same is true with oil. The trick is to regulate the flow or pulse small quirts at regular intervals so just enough to coat the bearings with fine smear on rails. It's not difficult really.
My mill as got programmable lube system which can pulse the pump and it just oils the bearings and ways nicely with very little to no excess, certainly not enough to contaminate anything.
You can buy these cheap enough now and they even do ones which will pump grease.

Same thing could easily be made with an arduino cycling a pump.

[Ger21]

That's fine if you use oil, but I'm on about grease. Tell me this though, does the oil drip about all over the place ? it's okay for you people who cut metal but I'm cutting wood and the last thing I want is oil contaminated wood, that's why I use grease.

You can do a central lube system and still use grease. Our Morbidelli has one.

[EddyCurrent]

Now in the manual 4.5 they say there is a thing called "Self-lubricating kit ‚E2’ "

http://www.hiwin.com/pdf/lg/linear_guideways_e2.pdf

Looks okay, uses oil, but I don't understand why these and other accessories, Hiwin especially, are so difficult to source and purchase. it's always like finding rocking horse cac.

In the same document is Hiwin - Intelligent Linear Guideway, looks like it might have potential to be used for position feedback similar to an encoder.