Tapping machine - video

**Jon** · Sep 13, 2021, 05:07 PM

Tapping machine. By TheDacchio. 12:15 video:

**sossol** · Sep 14, 2021, 10:46 AM

The head end of a parallelogram doesn't draw a straight line or stay vertical - it tilts in relation to, and moves away from and toward the base as it travels. If it's square at 90* it can't be square at any other position. It would have to have some sort of compensation mechanism to remain square in all positions.

Neil

**tonyfoale** · Sep 17, 2021, 01:37 PM

A parallelogram does what it says on the label. The opposite sides remain parallel to each other, so in this case if it starts out vertical it will do so through its range.

**dave003** · Sep 19, 2021, 05:26 AM

Originally Posted by sossol

The head end of a parallelogram doesn't draw a straight line or stay vertical - it tilts in relation to, and moves away from and toward the base as it travels. If it's square at 90* it can't be square at any other position. It would have to have some sort of compensation mechanism to remain square in all positions.

Neil

WRONG, it will stay vertical. You need to go back to your geometry books. The sides of a parallelogram will always be parallel to the opposite side, no matter the angles.