1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

DIY Projector Lift - Help required

Discussion in 'Home Cinema Building DIY' started by Rob_Quads, May 8, 2005.

  1. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    I am in the middle of designing a projector lift which will hide the projector in the ceiling when its not in use. Most of the design is sorted and its all fairly simple stuff - using 5 short drawer runners for the up/down motion with brackets made up to support it all.

    So the problem... Manual or Electric. It would be fairly easy enough to put a catch on it and a handle in the roof to enable it to be pulled down but ideally I would like something that will electrically move the projector down.
    As can be seen in the diagram below I need something with a throw of around 4.5" -> 5" BUT its overall size cannot be much more as this is being designed to sit between the joists and not protude out the floorboard of the room above.

    Any idea what I could use? All the actuators I have seen are all ££££ and also way too long even when closed.

    [​IMG]

    Cheers

    Rob
     
  2. gil2

    gil2
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
  3. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    That looks like a rather complicated solution. If it can't be done easily and cheaply i will just stick to the manual version :D
     
  4. gil2

    gil2
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    complicated aint the word m8 , jeez my head hurts from just browsing through it , i just though it might give ya some ideas , i have had a look around the net same as you , cant find anything on doing it on the cheap as a diy project , jeez they all want a fortune , i`l ask at work tomorow , see if anyone has any good thoughts

    something that worries me m8 after looking at your drawing again , how are you mounting the drawer runners ? are they gona be packed off the ceiling joists sideways or are you making a housing and then inserting that into the ceiling , its just that your drawing looks like yer sorta balancing the runners on the top of the plasterboard which odviously aint good
     
  5. gil2

    gil2
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    how about a small H to H mount and canterleaving the shelf the projector sits on , that way the constant up down is not putting to much strain on the motor

    H to H mounts are fairly cheap to buy especialy small ones , they normaly run of 12v supplys and are used for moving sat dishes left and right , a bit of imagination maybe and jobs a good un

    just noticed rob , u aint far from me :hiya:
    <opens window and waves>
     
  6. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    Whats a H-H mount?

    Ideally just something that could turn a horizontal motion from something like a linear actuator to a vertical motion is all i need
     
  7. gil2

    gil2
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    http://sms.sshost.co.uk/section.php?43

    this is a H to H mount m8 , it has a motor and tube that turns , the dish is mounted on the tube normaly for left and right movement , but if u where to mount it horizontaly and connect the tube to the shelf somehow you would get up and down movement , also if u click on positioner on the left hand column of the site i gave there , that connects to the mount and will move the tube on the h to h mount by the desired amount set with the positioner , they can be remotely controlled as well , worth looking into i`d say

    thats it m8 , thats all i can come up with
     
  8. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    After thinking some more about this I think I have given up the completely automatic idea but I am thinking along the lines of...


    The projector will be held up by a latch which can be released by a 12v solenoid - this can easilly be wired up remotely (I do it in cars all the time so know it well). This would then drop the projector when required. It would obviously need to be pushed shut but thats fine as it means there is no external 'handle' required to pull it down.

    The only problem with this design is it will come down with a bang without any dampening so i need to work out how to dampen the runners so that it moves slowly when released.
     
  9. sjl

    sjl
    Standard Member

    Joined:
    Jan 1, 2001
    Messages:
    81
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    8
    Ratings:
    +1
    I know this thread is relatively old as the forum gets lots of new posts very quickly but just a suggestion if you are still struggling.

    Use some gas struts from a car tailgate.They will give you the damped effect you want and are relatively easily mounted and as a bonus are quite slimline so will probably tuck away quite easily.

    Might be worth having a dig around a scrapyard for a few hours with a tape maeasure to see if it feasible.

    Steve
     
  10. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    I do like the idea - having done a lot of work modifying cars I thought about this option but unfortunatly bonnet struts are just too strong. If you have ever had a set off a car they are near impossible to close by hand. The main reason they are easy to close on a car is due to bonnet/tailgate weight and pivot points.
     
  11. kez

    kez
    Well-known Member

    Joined:
    Jan 18, 2002
    Messages:
    7,774
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Leeds, West Yorkshire
    Ratings:
    +959
    saxo, by any chance?

    :hiya:

    kez from SSC :)
     
  12. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    lol [​IMG]
     
  13. IronGiant

    IronGiant
    Moderator

    Joined:
    Jun 7, 2003
    Messages:
    53,751
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Location:
    Oxford UK
    Ratings:
    +29,766
    Don't hold your breath, but many years ago I picked up a pair of tiny gas struts that were being chucked out at work, Why?... because I thought they must be useful for something. :rotfl: It was probably 15 years ago.

    If I recall correctly they were about 6" long compressed and held/damped a 1/4" thick perspex lid about 3 foot by 1 foot. Might be just what you need. I'll see if I can find them. Can't guarantee anything, but you're welcome to have them.

    Caveat, if I can find them...

    Dave
     
  14. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    That sounds perfect. Had not seen any that short
     
  15. cowtipper

    cowtipper
    Standard Member

    Joined:
    Jan 29, 2004
    Messages:
    164
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    19
    Ratings:
    +0
    how about utilising a Linear Acutator
    I have been thinking about the same thing for a while now and the only way i could think about retracting the mount was utilising an actuator
     
  16. cowtipper

    cowtipper
    Standard Member

    Joined:
    Jan 29, 2004
    Messages:
    164
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    19
    Ratings:
    +0
  17. IronGiant

    IronGiant
    Moderator

    Joined:
    Jun 7, 2003
    Messages:
    53,751
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Location:
    Oxford UK
    Ratings:
    +29,766
    Looks good, might do the job for you.

    Had a look but couldn't find those baby gas struts.

    Dave
     
  18. Rob_Quads

    Rob_Quads
    Active Member

    Joined:
    Feb 14, 2004
    Messages:
    373
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Chandlers Ford
    Ratings:
    +12
    Bugger - that would have been perfect.
     
  19. IronGiant

    IronGiant
    Moderator

    Joined:
    Jun 7, 2003
    Messages:
    53,751
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Location:
    Oxford UK
    Ratings:
    +29,766
  20. davehk

    davehk
    Member

    Joined:
    Oct 17, 2003
    Messages:
    702
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    28
    Location:
    London
    Ratings:
    +45
    RS components have a range of adjustable pressure gas struts
     

Share This Page

Loading...