Zoltar machines user forum

Zoltar machines => Archive => Zoltar Classic CNC => Topic started by: oscar on February 25, 2013, 09:56:02 AM

Title: strengthen z-axis of the classic Zoltar
Post by: oscar on February 25, 2013, 09:56:02 AM
By attaching  the Kress engine the way I did
the z-axis bends in one direction when used.

I found out with heavy using the round holes become slightly oval.

My plan is  to replace the vertical plate by a 12mm thick aluminum plate.
then use the same brackets for the kress motor.

(http://www.fotostudio.nl/images/modelbouw/zoltar-z-as-1.jpg)
(http://www.fotostudio.nl/images/modelbouw/zoltar-z-as-2.jpg)
Title: Re: strengthen z-axis of the classic Zoltar
Post by: OldRaven on February 25, 2013, 03:27:37 PM
Hey Oscar,

I have the same problem.
Also need to strengthen this for my kress.

Peter
Title: Re: strengthen z-axis of the classic Zoltar
Post by: oscar on February 25, 2013, 10:16:20 PM
I am now cutting and sanding the 12mm alu block.

Without an CNC machine!

I will soon post the result here.
Title: Re: strengthen z-axis of the classic Zoltar
Post by: oscar on February 26, 2013, 03:39:59 PM
(http://www.fotostudio.nl/images/modelbouw/zoltar_new_z-axis_1.jpg)
(http://www.fotostudio.nl/images/modelbouw/zoltar_new_z-axis_2.jpg)
(http://www.fotostudio.nl/images/modelbouw/zoltar_new_z-axis_3.jpg)
(http://www.fotostudio.nl/images/modelbouw/zoltar_new_z-axis_4.jpg)

Lets hope it brings the results I expect.

@ Chris : What do I use to glue the bearing to the lowest plate ( CA glue ? )
Title: Re: strengthen z-axis of the classic Zoltar
Post by: Chris@home on February 27, 2013, 07:56:33 PM
Hello Oscar,

Seems you are having a lot of fun there.... :)
Upgrading the original 2001 first prototype after 13 years of service.

Thats great!

The bottom bearing does not need a seat / support and was self aligning.
Once the driveset is in position and running smooth,
you can add a drop of loctite thread locker to the edge of a bearing and
the bottom plate - if wished.

BTW, check the backlash on your delrin nuts - trapezium screws,
do minimize that with the setscrews and it will work as new.

Enjoy!

-chris-
Title: Re: strengthen z-axis of the classic Zoltar
Post by: OldRaven on October 25, 2013, 09:10:59 PM
Oscar,

Where did you get the aluminium holders for the fress that are mounted on the backplate?

I could really use those too...   yes yes..  I know. . I can mill them myself..  but I'm to lazy to do that :)
Title: Re: strengthen z-axis of the classic Zoltar
Post by: oscar on October 27, 2013, 07:20:57 AM
Quote from: OldRaven on October 25, 2013, 09:10:59 PM
Oscar,

Where did you get the aluminium holders for the fress that are mounted on the backplate?

I could really use those too...   yes yes..  I know. . I can mill them myself..  but I'm to lazy to do that :)

Made them myself.
If you like I can search for the Cad file.

Oscar
Title: Re: strengthen z-axis of the classic Zoltar
Post by: OldRaven on October 27, 2013, 08:41:17 AM
Hi oscar,

That would be great!

thanx

Peter