50send
Standard Member
Hi
I've come up with a DIY tab tensioning system which worked really well for me and has removed a large "V" wave from my Hitachi branded 2m 16:9 pulldown screen.
What I did, was to bore two small holes in either end of the roller casing in a vertical line with the screen fabric, avoiding the roller by drilling below it.
I then drilled two small holes in either end of the pull down bar through the plastic end caps, again in line with the screen fabric.
The roller casing on my screen is about 70mm longer than my screen on either side but the pull down bar is only 20mm longer on either side so I used eyebolts through the holes in the pull down bar to give me 70mm of projection to match with the casing above.
Next I threaded nylon cord through the casing holes, Knotted on the inside of the casing on either side and dropped the two cords through the eyebolts. Next I fitted eight self adhesive (4 on the front and 4 on the back) heavy duty velcro (eye)pads approximately 20mm x 20mm wide onto the black border of my screen, centred to divide the screen into three equal portions vertically. Next I got 5mm smooth plastic tube which I cut into four sleeves for the cord to pass through approximately 25 mm long.
I then wrapped the 4 sleeves with velcro (eye).
Finally cut the (hook) velcro into 4 strips about 3 inches long which I attached to the screen pads at the front , put the sleeves on the strips after threading the cords through them, then wrap the end of the strips around the screen onto the back pads, tying the ends of the 2 cords onto 2 heavy Knitting machine weights. You should then have the two cords coming down either side sliding freely through their sleeves,wider at the top pinching in vertically at two velcro strips on either side,then flaring back out through their eyebolts. To pull out stubborn waves try more weight.
Get in touch if you need clarification of any points.
Cheers !
Jim
I've come up with a DIY tab tensioning system which worked really well for me and has removed a large "V" wave from my Hitachi branded 2m 16:9 pulldown screen.
What I did, was to bore two small holes in either end of the roller casing in a vertical line with the screen fabric, avoiding the roller by drilling below it.
I then drilled two small holes in either end of the pull down bar through the plastic end caps, again in line with the screen fabric.
The roller casing on my screen is about 70mm longer than my screen on either side but the pull down bar is only 20mm longer on either side so I used eyebolts through the holes in the pull down bar to give me 70mm of projection to match with the casing above.
Next I threaded nylon cord through the casing holes, Knotted on the inside of the casing on either side and dropped the two cords through the eyebolts. Next I fitted eight self adhesive (4 on the front and 4 on the back) heavy duty velcro (eye)pads approximately 20mm x 20mm wide onto the black border of my screen, centred to divide the screen into three equal portions vertically. Next I got 5mm smooth plastic tube which I cut into four sleeves for the cord to pass through approximately 25 mm long.
I then wrapped the 4 sleeves with velcro (eye).
Finally cut the (hook) velcro into 4 strips about 3 inches long which I attached to the screen pads at the front , put the sleeves on the strips after threading the cords through them, then wrap the end of the strips around the screen onto the back pads, tying the ends of the 2 cords onto 2 heavy Knitting machine weights. You should then have the two cords coming down either side sliding freely through their sleeves,wider at the top pinching in vertically at two velcro strips on either side,then flaring back out through their eyebolts. To pull out stubborn waves try more weight.
Get in touch if you need clarification of any points.
Cheers !
Jim