NEW Welker Rotary Machine

[slicksteel]

has a double slider! from the website!
"
11. Technical Patent Pending drive system.
The internal (rearward) slide cancels out the up and down forces generated by the front slide and needle movement. This is achieved by matching the mass of the internal (rearward) slide to the mass of the front assembly (front slide, needle and rubber nipple). Across the whole range of motion regardless of chosen stroke or running speed the internal (rearward) slide and front assembly (front slide, needle and rubber nipple) move in opposite directions of each other at a mechanically matched speed and distance effectively canceling out the hopping action associated with the up and down movement of the needle.
The crank shaft has two journals driving a desmodromic type system. The crankshaft is supported on one end by the motors internal bearings and the other end supported by a stainless steel pilot bearing effectively taking the full load of the forces involved with decelerating , reversing and then accelerating the masses at 140Hz (cycles per second) off the end of the motor shaft and displacing it between the motor and the pilot bearing effectively eliminating any applicable motor and drive shaft flex. The crankshaft journals driving the front and rear slides are arranged 180 degrees opposed to each other giving the crankshaft a natural balance.
The end result:
This is referred to as being Dual Plane Balanced.
Up and down shaking associated with tattoo machines from the needle and armature bar or front slide as it pertains to a rotary machine moving up and down has been cancelled out.
The side to side shaking (the motion that draws ink up and out the top of the tube of rotary machines) a result of an eccentric cam type drive system as it attempts to balance the up and down motion actually causes the side to side shake. This too has been canceled out by design.
There for by canceling these effects we get a stable platform of operation with all components working within there optimal range. Reducing stress on the motor from shaft flex and various other factors as well as vastly reducing the fatigue experienced by the artist.
We encourage these machines to be run at speeds equal to coil liner and shader machines. Optimal range of operation is between 9.5 volts and 10.5 volts for shading and 10.5volts to 12 volts for lining.
We have found that artists tend to start at lower voltages due to previous experiences with rotary machines. Once they start to become antiquated with this type of machine they naturally start moving toward normal operating speeds that coil machines are tuned for.


Made in the USA"
http://www.eternaltattoosupply.com/z...%20cutaway.jpg