Quote Originally Posted by OwlsDen View Post
I would quite enjoy to hear your take on the side by side twin motor design. I would imagine that having both motors spinning in the same direction is better for the motors. What do you see as the benefit of such a design?

Without giving too much away Its the parallel configuration that I have most vested interest in...

A side by side configuration offers the most potential - in my humble opinion - both for success and for resounding failure. I will allow the rest of you make up your minds as to my conclusions - the former of the later...


In this instance the question is not so much on the motors, and whether they run in the same direction or not, but on the accuracy of the motor, the subsequent given RPM per motor at a given voltage and the effect on the coupling/linkage that connects the drive of the motors to the armature/needle drive system (somebody earlier mentioned a 'clutch' system, and its necessity was briefly discussed...)

To expand, My issue in this application is first and foremost the motors and the pairing of the RPM at a given voltage. No two motors are created equally - fact. Even the highest spec motors have a degree of - almost immeasurable - variance, meaning that at any given voltage, unless specifically manufactured to be paired and to work in sequence (unheard of outside the realms of aerospace technology as far as I am aware), no two motors will output the same RPM. In simple terms, one motor has potential to make 1 full revolution per unit, and the other to make 1.5 revolutions, or 1.1, or 0.9 etc. etc. thus not in sync.

Secondly, combine that variance with a non-fixed linkage, and you have potential for trouble. If the point at which the linkage connects to an eccentric cam is a bearing, and the point at which the two 'uprights' connect to the cross member are pivoted, with the centre upright that connects to the armature/nipple appears being fixed; at some point when the motors run out of sync (which may or may not be the case here) you are going to have the separate cam's independently driving in apposing directions - one lifts, the other pulls down.

But then again, I could be VERY much mistaken.

The terminator seems to have a fixed linkage as far as I can see, thus somewhat negating all of this, but all with its own set of complications