Answers I hope
Posted: Mon Mar 02, 2009 6:56 pm
Here's some thoughts:
1. The sliding legs are just riding on the bottom of the table. I contemplated putting a sheet of high density plastic on the underside of the table but opted for keeping the edge of the 2x4 the only thing touching - figured the low surface area would keep friction down. The sliding legs are kept in line with the table by strips keeping them from getting "cockeyed" in the underside.
2. The fixed legs are attached to the side bracket and they too touch the underside of the table. Let me explain: The weight of the table wants to flatten out the "scissors". The side brackets trap the fixed leg side although they still want to rotate (flatten out). The upper edge of the fixed side rotates until it contacts the underside of the table. Since both moving and fixed legs are a) the same length, b) pinned at the same height, and c) attached to the same plane (underside of the table) gravity takes care of leveling the table. The only time this would not be the case is if you raised the table high enough that the fixed leg rotates vertical enough that the threaded rod carries the load.
3. I would love to see how the pistol grip works. I thought about it and ruled it out with the following logic: it would raise the table no problem - a bit course perhaps but would raise it no problem. But lowering was a concern - how would I control the table when lowering? Seemed that trying to release the cam trigger while holding 40 lbs of table top was a bit of a death trap. Make no mistake - if not secured well this design will collapse and likely remind you to keep your fingers out of harms way.
I think perhaps a better option would be to fashion a "screw clamp/vice" out of a 48" piece of threaded rod. Nylock/washer, through moving and fixed legs, washer, drill through the threaded rod and put a cotter pin, leave some thread and put on a handle. This should fix the threaded rod between the fixed and moving legs and "pull" the moving legs towards you with a rotation. Probably would work fine but would take a while to adjust the height??
4. I made the table out of 2 sheets of .5" MDF on top of a dado'ed cut torsion box out of 1x2 popular. So what does that make it - 2.5".
Hope this helps.
1. The sliding legs are just riding on the bottom of the table. I contemplated putting a sheet of high density plastic on the underside of the table but opted for keeping the edge of the 2x4 the only thing touching - figured the low surface area would keep friction down. The sliding legs are kept in line with the table by strips keeping them from getting "cockeyed" in the underside.
2. The fixed legs are attached to the side bracket and they too touch the underside of the table. Let me explain: The weight of the table wants to flatten out the "scissors". The side brackets trap the fixed leg side although they still want to rotate (flatten out). The upper edge of the fixed side rotates until it contacts the underside of the table. Since both moving and fixed legs are a) the same length, b) pinned at the same height, and c) attached to the same plane (underside of the table) gravity takes care of leveling the table. The only time this would not be the case is if you raised the table high enough that the fixed leg rotates vertical enough that the threaded rod carries the load.
3. I would love to see how the pistol grip works. I thought about it and ruled it out with the following logic: it would raise the table no problem - a bit course perhaps but would raise it no problem. But lowering was a concern - how would I control the table when lowering? Seemed that trying to release the cam trigger while holding 40 lbs of table top was a bit of a death trap. Make no mistake - if not secured well this design will collapse and likely remind you to keep your fingers out of harms way.
I think perhaps a better option would be to fashion a "screw clamp/vice" out of a 48" piece of threaded rod. Nylock/washer, through moving and fixed legs, washer, drill through the threaded rod and put a cotter pin, leave some thread and put on a handle. This should fix the threaded rod between the fixed and moving legs and "pull" the moving legs towards you with a rotation. Probably would work fine but would take a while to adjust the height??
4. I made the table out of 2 sheets of .5" MDF on top of a dado'ed cut torsion box out of 1x2 popular. So what does that make it - 2.5".
Hope this helps.