I thought the cutter speed on these things was around 2000 rpm? That was what the old timers generally tried to gear their leather belt machines too anyway: Anyway that was the rpm speed I was headed for whether I power it with a electric motor, or power it the pto on my tractor. with a dunno:
I am not familiar with square head cutter heads Jeff, but it would seem to me you could still use a dial indicator to ensure all your cutting edges are an equal distance from the centerline of the square head block? Assuming there is no discernible play in your babbitt bearings, you could use the diameter of those bearings as your centerline? At the same time, a rotating square flying through space makes a circle. Once you figure out what that radius is, you merely have to adjust your cutting edge so it extends the same amount. I know maybe easier said then done?
I would think a magnetic base with a rigid arm to hold the dial indicator would come into use here. You really are not trying to get any real measurement, but really just want to make sure the two blades are set at the same pareellel height with the tables. Well assuming that distance doesnot take toomuch ofa bite out of your wood. Since you say the board is flat, you have got to be close.
I am not criticizing you at all here Jeff, just trying to figure something out that works. The problem is I am not familiar with square heads and can only picture my machine which may be somewhat different then yours.
Still I love these threads. It gives me a kick in the butt to get mine rebuilt. I see Travers has their A2 tool steel on sale this month so that I can get cutting some new edges machined out. Other then finding a five horse single phase electric motor to power this thing, or some unique tractor pto gearing, I'll be golden. (Like that is going to happen)
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"