V-Slot its like T-Slot with built in linear rails!

Awesome! Thanks. We sure hope so.

We'll watch for the package.

Thank you,

Mark and Trish

Never heard back,
How did you like the bearing block I sent you?

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My projects are listed here - [www.el34world.com]

Doug,

Thank you so much for sending the block. I have to apologize. Right around the same time that you sent the block, we were leaving for vacation so we didn't have much time to work with it and since we have been back we have been very busy.

I like the idea. If only they would roll or maybe if they were recirculating. Like you stated, they are just too tight in their current form.

You did a great job putting this together and we appreciate you sharing it with us.

As we move forward with further design modifications, this may lead to a new style carriage after all.

Thank again,

Mark and Trish

yeah, they would have to circulate is what I am thinking.
And the balls need to be smaller in order to keep the body size small.
Not much can be done with the current design.
It was just a fun idea I had

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My projects are listed here - [www.el34world.com]

I agree. The circulating balls would work great. Maybe we can work up a version in large scale.on V-Slot and if it works, we can shrink the whole system down including the V-Slot itself

We'll keep thinking on this. It is a fun idea. Thanks again.

Mark and Trish

Do you guys have any UK distributors of V-Slot yet? I'm looking into a few options for a custom Delta based RepRap and have so far looked at using standard 20mm T-Slot with an openrail, but from the looks of V-Slot it may be a nicer option.

Edited 1 time(s). Last edit at 12/23/2013 09:31AM by RickM.

Hello RickM. Yes, we have a UK distributor. You can view the OpenBuilds Distributor Map at the link below. We are accepting distributors and still working on the map so please be sure to check back for updates.

[openbuildspartstore.com]

[www.openbuilds.com]

Thanks Kram - didn't notice that page when I first looked.

I'll keep an eye on this for a future delta project!

Cool. Thanks RickM. Happy New Year!

@EL34:

Try adding a ring of small ball bearings to the bottom of the bore to allow the main bearing the ability to spin.
[us.misumi-ec.com]



Edited 1 time(s). Last edit at 06/08/2014 01:43AM by A2.

That's a cool idea

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My projects are listed here - [www.el34world.com]

An idea to work with a low profile 3d printed bearing retainer.

The smaller bearings roll on top of a steel washer, that is backed by a set screw which can adjust the bearing preload independently.

Utilizing a 3d printed bearing retainer, print a through hole to trap the large bearing, and thread the bottom of the bore to accept a set screw (grub screw) to perform as a support, and adjustment for bearing preload. This will allow you to adjust each bearing independently to compensate for imperfections of printing or boring holes exactly to the same depth.

Then place a steel washer on top of the set screw. This gives the bearings a metal surface of lower friction than plastic to roll upon, improving the efficiency, and life of the bearing.

I am all set on my printer.
I am not using V-Slot, I use 20mm T-slot rails

My V-slot idea was just an experiment to see what I could come up with
Your idea sounds fun, are you going to make one and test it?

I custom made UHWM bearings for my printer that ride on 20mm T-slot rails
They slide like glass and are very smooth

See the attached image

Edited 1 time(s). Last edit at 06/08/2014 06:52AM by EL34.

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My projects are listed here - [www.el34world.com]

Quote
EL34
Your idea sounds fun, are you going to make one and test it?

No, I just posted the utility, and design description for any one who might need that type of solution.

I am still confused as to how the set screw rides on the washer and adjust the bearing play
How big is the washer and how big is the set screw?

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My projects are listed here - [www.el34world.com]

Fabricate a hole the diameter of the large bearing. At the bottom of the hole is located a metal washer. Between the washer, and large bearing are the smaller bearings (not shown). Behind the washer is another hole that is tapped for a setscrew. The setscrew (not shown) advances the washer toward the opposing linear rail.



Edited 1 time(s). Last edit at 06/08/2014 08:31PM by A2.

Quote
kram242
I like the idea. If only they would roll or maybe if they were recirculating. Like you stated, they are just too tight in their current form.

Quote
A2
Try adding a ring of small ball bearings to the bottom of the bore to allow the main bearing the ability to spin.

Quote
EL34
yeah, they would have to circulate is what I am thinking.
And the balls need to be smaller in order to keep the body size small.
Not much can be done with the current design.
It was just a fun idea I had

The problem can't be solved by A2's design, because it isn't a problem with the ball rotating, but with the difference between the two halves of the track - the ball is always trying to climb uphill, not only is it doing that, but it is skidding uphill along a changing-radius path.

So, effectively the front of the ball is acting as a brake for the back, if you see what I mean (no engineering degrees in my family!).

Linear-balls work best in straight lines - anything else will result in huge wear, very quickly.

The solution is smaller balls, (unlike in life!) like this:



Or this:



Edited 1 time(s). Last edit at 11/06/2014 06:19AM by ledaero.