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Archive for September, 2011

Lens Assembly Spacers. Eureka! Revisited…

September 30th, 2011 No comments

Here are the instructions for making the Lens Assembly Spacers:

BOM:

300mm X 75mm ( 1 ft X  2.95″ or 3″ pipe )  PVC Drain or Sewage Pipe.

Your projector might need a different size, but the procedure might be the same.

 

Mark and cut a 22mm and 15mm spacers .

 

Sand over 80 and 150 grit sandpaper laid on a flat surface, and check for uniform width.

 

Slide over the body of the Lens and cut little notches (see above picture with the glass) where the little bolt heads are in the way of the spacer:

Replace the Lens Assembly and try to focus and adjust the zoom.

I will be securing the Lens Assembly with 25mm X 2.5mm (for the 15mm Spacer ring)  or 30mm X 2.5mm (for the 22mm Spacer ring) bolt.

For now it is still in the unsecured state, since I am experimenting with different settings.

Be Safe around cutting tools and knifes!

 

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Revisited VAT Holder and Tilt

September 30th, 2011 3 comments

So, Here is the finished revisited VAT Holder and tilt:

This is my 150mm X 150mm regular Soda-Lime green glass test piece ( until my borosilicate 5.5mm glass arrives ).

Slide the Aluminum extrusion profile from the BOM of the VAT Frame Cont. post and First Stab at VAT… over the edge and:

Secure the Glass with the help of the Hex grub screws of the Glass Shelf Holders.

Leave some spacing for a bracket that will be hooked up to the VAT tilt linear slide and motor.

Take some measurements and draw a horizontal line on the L-shape profile from the BOM:

Keep the aluminum and glass holders tight and leveled parallel to the L-shape profile.

I am using 4mm bolts (they will be cut to length later), so drill with 4.2mm bit. This leaves some room for adjustments ( about 0.3mm ) in all directions.

Once both sides are done line them up and tighten slightly. Use some soft foam (or thin rubber strips, or folded paper etc.) to pad the glass in the aluminum profile. Be careful not to break the glass. Place it on a flat surface (see Build Base ) and level.

I will choose one of these three springs based on trial and error:

First is stiff, second is soft and springy, third is a little short and stiff. The washers are M4 – 18mm X 1mm.

Done! Have a productive day!

P.S. Wear eye protection when working. Be safe!

 

…Ever have an Eurika! moment?

September 27th, 2011 5 comments

As the previous post shows my waste of time on  something trivial, this one is exhilarating! Eurika! I yell…

Cut a piece of 70mm sewer pipe that is 22mm high. Slid it over the lens assembly and fired up the projector…

 

In case you are wondering where I have gotten the Lee Filters from http://www.leefilters.com/lighting/contact/ and request a sample pack. The filters are fantastic for other uses!

WARNING! You should not look into the projected image – temporary or permanent blindness may occur.

Always consult and follow  your manufacturers user manual. If  you decide to disregard the manufacturers safety instructions…well, you are on your own. You have been warned. I take no responsibility nor am I liable for the stupidity of others!

I managed to get the image down to 30mm X 40mm WOOWWWW!

If you are not convinced look at the caliper…

You can see the Lee Filter information “(HT) * 027 MEDIUM RED” as to the wavelength the filter applies to.

If you are wondering how was I able to focus the image on such a small area, I had this little gem in my “Ebay” box. I remember buying one as a gift for someone, but cannot remember who. I was able to use it to photograph my fingerprints-see below:

 

I looked though the microscope and filter, and adjusted the focus until the little letters under the “DELL” logo are clear or focused, as far as my vision can tell.

UNDER NO CIRCUMSTANCES SHOULD YOU LOOK THROUGH THE MICROSCOPE AT THE IMAGE THE PROJECTOR CREATES WITHOUT PROTECTING YOUR EYES FIRST! This blog is for informational purposes only.

Hope you have a great build day too!

E U R E K A !

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