My DIY mount for L300u $20 :) - AVS Forum
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post #1 of 328 Old 03-01-2003, 11:54 AM - Thread Starter
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Here are some quick snap shots of the DIY mount I just made, only $20..
LL
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post #2 of 328 Old 03-01-2003, 11:56 AM - Thread Starter
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Closer
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post #3 of 328 Old 03-01-2003, 11:59 AM - Thread Starter
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I was going to paint the plumbing parts black but I kind of like the sliver contrast.
LL
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post #4 of 328 Old 03-01-2003, 12:19 PM
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very nice!

can you post a 'parts list' and where you picked them up at?
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post #5 of 328 Old 03-01-2003, 12:33 PM - Thread Starter
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Here is the parts list

Home Depot
(2) 3/4 Floor flange
(1) 3/4 X 10" Black steel pipe
(4) 1/4" X3/4" nut and bolt (machine)
(4) #12 X 3/4 Sheet metal screw (For mounting to ceiling board)
(1) 1/4" plexi glass 8X10 (I had to have the guy there cut this for me)
* What's not pictured is a piece of particle board that mounted to the ceiling studs*

Hardware Store
(4) 1" compression springs
(4) lock washers
(4) Flat washers
(4) M4 X 76mm (3 inches long or so) screws
(8) 4mm wing nut bolts
(8) Finishing washers (great for cradling the springs)
(4) fender washers 3/4"
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post #6 of 328 Old 03-01-2003, 06:36 PM
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Very nice! I particularly like the use of compression springs. Thanks for the pics and parts list.
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post #7 of 328 Old 03-01-2003, 07:13 PM
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Nice work Monk, you may have just saved me 160.00 for the chief mount.
I'm going to try this tomorrow, I like it much better than the single center screw mounts I've been seeing..
It's great to be creative (I'm not)!
Thanks again.

"I'm your Huckleberry"
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post #8 of 328 Old 03-01-2003, 09:50 PM
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I made a similar mount but used a threaded rod as the main support. By having the rod go through the perspex I can height adjust the projector by about 40mm. The projector is suspended by screws into the four mounting holes. This allows me to individually adjust the angle of the projector. Overall it makes for a very elegant ceiling mount as basically the projector is hung from a perspex sheet, which is attached to a 12mm threaded rod.Overall cost was about $15US.
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post #9 of 328 Old 03-01-2003, 10:15 PM
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Quote:


Originally posted by jamesdoc
I made a similar mount but used a threaded rod as the main support. By having the rod go through the perspex I can height adjust the projector by about 40mm. The projector is suspended by screws into the four mounting holes. This allows me to individually adjust the angle of the projector. Overall it makes for a very elegant ceiling mount as basically the projector is hung from a perspex sheet, which is attached to a 12mm threaded rod.Overall cost was about $15US.

James, interesting. Can you post some pictures?
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post #10 of 328 Old 03-02-2003, 02:26 AM
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Nice mount I like the clearance.
Here's one I just finished.
Chuck
LL

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post #11 of 328 Old 03-02-2003, 02:30 AM
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Another view.....
LL

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post #12 of 328 Old 03-02-2003, 09:55 AM
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Quote:


Originally posted by davgiles
cmoore1,

That looks really nice! But how will you adjust the image onscreen? I'm not sure a team of NASA engineers could do the necessary calculations and then build and mount a screen/projector mount combination that wouldn't need at least a little bit of final adjustment in height, pitch, and yaw to line up the picture.

David

Small amounts of keystoning will be visually undetectable (I think I heard up to 3 degrees tilt on the projector). As for the other kind of adjustment (yaw?), you can always mount your screen unevenly to compensate

Mike U.
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post #13 of 328 Old 03-02-2003, 10:07 AM
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Quote:


Originally posted by davgiles
cmoore1,

That looks really nice! But how will you adjust the image onscreen? I'm not sure a team of NASA engineers could do the necessary calculations and then build and mount a screen/projector mount combination that wouldn't need at least a little bit of final adjustment in height, pitch, and yaw to line up the picture.

David

In the first pic, the radiused slot to the back of the ceiling plate will take care of yaw. I will adjust the height with the screen, it's a pull down unit.
Should I not be able to get it lined up with those methods PLUS the zoom function, I'll install washers at the appropriate points.
Chuck

Fullscreen is an F-word
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post #14 of 328 Old 03-02-2003, 12:11 PM
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Quote:


Originally posted by davgiles
Yeah that pull down screen should make it easier. I was thinking in terms of a permanently mounted screen.

David

Well any setup will have one of the components yielding to the other. Either the projector will have to be mounted to align with the screen or vice versa. My setup design wants the image as low as possible, so I designed the mount to hold the projector just a couple inches over my head while standing underneath.( I'm the tallest in the house.) The mount is 15 inches of drop, the screen is a 92" wide 4:3 model that will have an extra 17" of material above the masked 16:9 area. The calculations of image offset with the projector upside down is approximately 2.875 inches above lens center. Without going in to all the specifics of the math, it looks like I'll have to roll the screen up somewhere between 2 and 6 inches, accounting for amount drop created by the screen housing itself (which I don't know yet, it hasn't arrived, should be here Mon-Tues The bigger issue is the resolution of the ratchet mechanism in the retractor of the screen, if it locks at 2 inch or greater increments then I will most likely have to submit some "engineering changes" to make it line up vertically assuming one of those locked positions doesn't land perfectly in line with the image.
Besides, I'm a machinist, who do you think fixes all the mistakes made by those boys up in the engineering office at NASA?

Chuck

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post #15 of 328 Old 03-06-2003, 12:53 PM
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Monkey_Man, thanks for showing us your design and giving a parts list. IMO it is the best one I've seen yet.
I noticed you used two wing nuts per screw. I like the one used for fine adjustments on top of the plexi glass but what was your reasoning for the one on the projector? Can a regular hex nut be used instead or do you use that one for adjustments as well or does it make it easier to remove the projector for servicing? Just for clarification does M4 X 35mm screws mean a 4mm threaded screw that is 35mm long? How stiff are the springs you used? TIA
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post #16 of 328 Old 03-06-2003, 05:21 PM
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Hiya Cliff..

I'm not Monkey Man, but I built a very similiar project with his idea..
I used standard Hex nuts instead of wing nuts because it made the project that more easier on me.. The nuts don't have to be tight to hold the projector, so spinning a hex nut with your finger will do fine for fine tuning the image level/height..

And yes..
M4 = Metric 4mm Thread(fine)
35mm = 35millimeter long bolt

Heres a link to my similiar mount.. btw, Keep in mind I have a Z1 so plexiglass size will be different for the Panny...

http://www.avsforum.com/avs-vb/showt...hreadid=233598

Visit me at petedz.com
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post #17 of 328 Old 03-07-2003, 09:03 AM
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Monkey God/ Breakstuff

can you please lable your diy mount picture with the part list? (for the idiots like me)

Thanks

MS.
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post #18 of 328 Old 03-07-2003, 12:08 PM
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Thanks Monkey_Man! Great Job! I'm gonna build one of these for my L300u. I'm going to use a brushed aluminum plate though in place of the plexi glass as I already have a piece I can use in my garage.

Thanks for posting.

Brent

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post #19 of 328 Old 03-08-2003, 09:01 AM - Thread Starter
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I finally mounted the PJ to the ceiling I need to paint the front of the board, but I was too excited to check out the PJ. The black board connects two ceiling studs. I just mounted the PJ to the part of the board that best fits the throw of the l300u.

I used wing nut on the bottom of the screw because I just wanted a tool free means of unlocking the 4mm bolt from the PJ.

The fine adjustments of this setup is excellent! I was able to adjust the pitch and yawl perfectly with fine incremental movements.

I also used blue jeans cables, my lord these cables are very unruly. My girlfriend was like, "oh my god those cables are huge". Ugly but they work great.

Thanks for the compliments guys
LL
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post #20 of 328 Old 03-08-2003, 09:15 AM - Thread Starter
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post #21 of 328 Old 03-08-2003, 09:53 AM
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I'm thinking about making your mount... The pipe thing will work great, because I'll have it mounted for just a few months in one room before I move it to another, which will probably require a different hang height.

I'm suprised that you did not run the video wire thru the pipe down the the projector. You could run the power on the outside and provide some shielding effect. That mount looks like it is perfect for this, all you would have to do is cut out the plexiglass where the center of the pipe is, and if you ran the wires above the ceiling you would never see them... Or use wire channels.
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post #22 of 328 Old 03-08-2003, 10:34 AM - Thread Starter
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The blue jeans cable won't fit though the pipe I could cut the outer shielding hose off the cables but that goes beyound the payoff for me. I'm living temperaly in an apartment right now. I would go that rought in the future. Thanks for the suggestion
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post #23 of 328 Old 03-10-2003, 04:04 PM
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i made my mount and people have complimented me on how clean it looks...thanks monkeyman...
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post #24 of 328 Old 03-11-2003, 05:01 AM
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I'm in the process of making mine, however I have found that the M4x35 screws for the projector a bit short. Not enough room to get the spring and wingnuts between the projector and the plexiglass.
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post #25 of 328 Old 03-11-2003, 08:08 AM
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Monkey_Man:

Nice Job! My PTL-300U should be delivered today. Because my ceiling is low, I won't need an extension pipe. How would you suggest I change your DIY mount design for a flush mount installation.

Bananas and Peanuts,

Monkeyphant
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post #26 of 328 Old 03-11-2003, 08:29 AM - Thread Starter
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I'm sorry yellowsubmarine. The length of the 4mm screws should be around 3 inches or 76mm. I apologize for posting the wrong length on the screws. Not sure how that happened. Sorry
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post #27 of 328 Old 03-11-2003, 08:41 AM
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Hey all, I really like the mount MM dreamed up. I like the price also. The only thing I need to do now is get off my butt an order one of these pannys. What do you think. Does this sound like a plan or what?

JOHN O WESSEL III
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post #28 of 328 Old 03-11-2003, 10:14 AM
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Monkey_Man:
Looking at your picture, I am thinking for a flush mount the way to go would be to use a sheet of wood (maybe pine) instead of the plexiglass and bolt that to the ceiling. To make adjustments, I would use the one set of wing nut bolts attached to the 300U.

Monkeyphant
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post #29 of 328 Old 03-11-2003, 10:36 AM - Thread Starter
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monkeyphant, sure that would work. I went with plexiglass to match my furniture. I have glass tables and end tables. The plexiglass was a compliment, well in my opinion The blue jeans cable on the ceiling tends to remove the class from my living room One day I'll have a house that I can make dedicated home theater room.
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post #30 of 328 Old 03-11-2003, 10:41 AM
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Monkey_Man:
The plexiglass looks great! After what the 300U cost me, I have just enough money left to build your DIY Mount and a DIY Screen.

Monkeyphant
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