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Building Mendel - lowest point

Posted by khiraly 
Building Mendel - lowest point
January 03, 2010 12:17PM
Hi!

Do somebody know on what the Mendel is supposed to stand?

I always thought on the 4 frame-vertex. As I have put together the frame all the bearings under the frame are lower than the four corners (frame-vertex).

Now I want to put the z threaded rod, but the gears are the lowest points of the machine. So it does not stand anymore.

Can anybody clear this up for me please?

In doubt I can put some pictures online.

Thank you in advance.

Edited 2 time(s). Last edit at 01/03/2010 12:20PM by khiraly.
Re: Building Mendel - lowest point
January 03, 2010 12:50PM
It does sit on it vertices.

You can post pictures up on photobucket for example and paste the image links here.
That would be better for us to help, if we could see where your problem is.
Re: Building Mendel - lowest point
January 03, 2010 12:57PM
Hmm, looks like a bug. In the video presentation by Ed you can see that it sits on the frame vertices, but in the 3D model the nuts on the z-axis rods are slightly below that. Also several M4 bolts are a long way below, but you could just shorten them.

Perhaps a work round would be to fit some stick on rubber feet. Probably good for noise reduction as well.


[www.hydraraptor.blogspot.com]
Re: Building Mendel - lowest point
January 03, 2010 01:07PM
> Hmm, looks like a bug. In the video presentation by Ed you can see that
> it sits on the frame vertices

I have watched several times, for observing, and for me it looks like there is shadow under the frame vertex, so it does not touch the surface.

I will post definietly some photos this evening. Just want to mount everything. (just finished cutting to length the linears shafts).

Best regards.
Re: Building Mendel - lowest point
January 03, 2010 10:30PM
I ran into this too. My solution was to file the bottom m8 nuts thickness to almost half. That left a little bit of clearance between them and the counter my Mendel sits on.
Re: Building Mendel - lowest point
January 03, 2010 11:25PM
nophead Wrote:
-------------------------------------------------------
> Hmm, looks like a bug. In the video presentation
> by Ed you can see that it sits on the frame
> vertices, but in the 3D model the nuts on the
> z-axis rods are slightly below that. Also several
> M4 bolts are a long way below, but you could just
> shorten them.
>
> Perhaps a work round would be to fit some stick on
> rubber feet. Probably good for noise reduction as
> well.


I noticed when looking at the 3D model, that the 4 screws used for the power connector are effectively upside down, such that there is not enough clearance.

Else the problem may be a tolerance thing with washers and nuts
[vimeo.com]
Shows in parts how much clearance there really is.

Edited 1 time(s). Last edit at 01/03/2010 11:32PM by Grogyan.
Re: Building Mendel - lowest point
January 04, 2010 12:19PM
This photo taken from [blog.arcol.hu]


I can easily see the problem, those plastic bits are upside down
Re: Building Mendel - lowest point
January 05, 2010 09:24AM
Grogyan: you mean the z-leadscrew-base part should be upside-down?
This one:


Or should the whole stuff (gears, bearings and also the belt) go at the top? (ie. above the z-leadsrew-base part)

Thanks for the tip, I will experiment with it.

ps: I also finished the texts of the blogpost too;-)
Re: Building Mendel - lowest point
January 05, 2010 10:01AM
The z-leadscrew-base is upside down compared to the 3D assembly I am looking at.


[www.hydraraptor.blogspot.com]
Re: Building Mendel - lowest point
January 05, 2010 11:18AM
z-leadscrew-base both sides
z-motor-bracket
z-tensioner

All of which could are upside down, as is in the photo I posted from the blog, and in your photo too

Edited 2 time(s). Last edit at 01/05/2010 11:43AM by Grogyan.
Re: Building Mendel - lowest point
January 05, 2010 01:34PM
like this:


Re: Building Mendel - lowest point
January 07, 2010 05:59PM
I swapped the parts. Here is a photo about it:
[blog.arcol.hu]
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