Trunnion Design - Page 2 - Router Forums
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post #11 of 17 (permalink) Old 06-27-2019, 05:13 PM
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Quote:
Originally Posted by kolias View Post
Now I have enough to get going and although a cnc would make the task much easier I can do the same with my router and my circles jig.
A good circle jig should work alright. Keep us posted on your progress, might be a few people interested in making a small hobby saw.

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post #12 of 17 (permalink) Old 06-27-2019, 07:34 PM Thread Starter
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No problem Mike but it will be sometime before the final project is done. The attached pictures is my interpretation of various info I gather from the web and they show a sample made out of 5/8 MDF to complete a rough model. (MDF is very easy to work with making a model)

The first pictures show the Up/Dn arm of the blade which was easy to do and works fine. Next Im working on the blade tilt mechanism which I have problems to understand. What is shown in the pictures is wrong but I just wanted to see how some alternatives may work. With the info I got now from the answers on this forum I will have to make the new trunnions and then establish their location.

My main problem is that my 10 amps router is too big to make small radius and I struggle with various jigs to complete the curves. I also have a manual mini Taig Lathe and Mill with a rotary table so Im thinking to try the Taig to do the curves which is time consuming especially now in the summer when I dont stay long enough in my workshop. That should have been a winter project when we all are cooped up inside up here in Canada, lol
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post #13 of 17 (permalink) Old 06-27-2019, 09:17 PM Thread Starter
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......Like Mike pointed out earlier you want the radius point to be centered on the intersection of the blade and the table top or you will create other problems that will limit the usefulness of your tool. .
Mike can you please explain which radius point you mean? On the attached snip is it Point A or Point B?
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post #14 of 17 (permalink) Old 06-27-2019, 09:44 PM
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Nicolas here is a picture of what I am talking about. The pivot point is at the intersection of the table top and the centerline of the blade. The trunnion radius will be whatever will fit your cabinet.
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post #15 of 17 (permalink) Old 06-27-2019, 11:34 PM Thread Starter
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Excellent schematic Mike, thanks for your time

Now I got it and hopefully by the weekend I will have the trunnions done
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post #16 of 17 (permalink) Old 06-28-2019, 02:59 AM
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Matthias has made most things;
here is his trunnions
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post #17 of 17 (permalink) Old 06-29-2019, 03:52 PM Thread Starter
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I got the trunnions done today (used 3/8 plywood) and after the installation I noticed a few mistakes.

First I have to lower the trunnions brackets by 5/8 to clear the table top when the blade swings. Also the base turned out not wide enough to fit the trunnions inside and I will have to fix this.

The trunnions radius turned out by mistake 1-7/8 and it should have been 2-1/8. I will see if I have to make them again.

Overall it looks good but I have to install the mechanism to raise the blade to really see if I did the trunnions correct. For now it Looks good

BTW if anyone wonders the motor is 12-24VDC, 8K to 15K RPM.
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