On Fri, Feb 21, 2020 at 07:51 PM, imranindiana wrote:
but your illustration showed the affect of roller not being parallel to the table but what I am suggesting is possible with roller that is parallel and is much more likely to occur if the board is tall.
Sorry, I guess I wasn't clear.? I wasn't intending to show a mis-adjusted roller.? The point is that the roller is pushed down on either end by a spring.? At rest, the roller is lower than the cutterhead by a couple millimeters.? ?So let's say the planned cut is 1mm.? ?So the roller (at rest parallel to planer)? is 3mm lower than the top edge of the board when you begin to feed.? When the roller contacts the board, the roller moves up under the spring pressure, but if the board is on one side, the roller will raise up at an angle, as shown in my drawing, and will at this point no longer be parallel to bed.? The roller is now placing pressure on the top of board only at the inner edge.? Hence the rotation when the cutterhead begins the rearward force.
