34 ms·
Mostly true but not quite. The forces on the chains are actually higher when the chains are "shorter" and the router is higher up. The farther from vertical t
by lostapathy 10y ago
Mostly true but not quite. The forces on the chains are actually higher when the chains are "shorter" and the router is higher up. The farther from vertical the chains are, the more horizontal tension there is on top of the vertical component.
The same basic principle shows up in rigging - http://www.fdlake.com/rig-slng.html http://www.fdlake.com/rig-slng.html - the illustration where the straps are at 90 degrees is rated higher than 45 degrees.
- grogenaut 10y agoAlso there is slack in any gear/chain train when switching directions as they never fit perfectly. Same with gears. Even tiny amounts will throw you past .4 mm quickly
- prashnts 10y agoI think by keeping the object to be cut out in the centre, having small (relatively) size would experience lower slack, hence reduced deviation from the said accuracy.
- lostapathy 10y agoActually that kind of backlash isn't a problem in a machine built like this. The tension of the chain against the sprocket is always pulling in the same direction around the sprocket. Even when the sprocket reverses direction, the chain is pulling the same way and staying tight to the same side of the teeth it was on.
- grogenaut 10y agoThat would be correct until you figure in momentum as long as you stay under that threshold your hypothesis holds, if you get the device moving or swaying it won't. Of course this can be compensated for in software. So Point taken.