All Carving Duplicators Are Not Created Equal


A duplication machine is a significant investment for your business. We understand this and want to be certain you make the right decision for the work you do. To this end we have created this overview of duplicator qualities so that you can be an informed consumer.


To get the most accurate copy out of a duplicator, its structure and all of its components must be as rigid as possible. A rigid duplicator will take a heavier cut with accuracy giving you a cleaner copy in less time. Since you are probably buying a duplicator to cut production time we consider this the key quality of a machine.

Checklist for rigidity:

Carriage rails of 2" thick walled tubing for minimum flexing
A simple design with few components and joints
A steel structure that resists twisting and deflection
High-quality, steel ball bearings for precise movement

A cheaper carver will not meet these standards. A flexible machine requires excessive time and care to produce an acceptable carving. A rigid carver will take fewer passes as the cutting head can bite down hard without deflecting from the path of the follower.

Be wary of under-designed Duplicators.
Here are some signs:
  • Cutter set back from follower - Users are often forced to set the cutter back from the tracer to cut oversize to prevent gouging errors. This results in a low-fidelity reproduction that requires much more post-duplication finish work to bring up to spec.
  • Up-spiral cutter - Sometimes used in an attempt to reduce gouging if the structure is not rigid enough to resist the digging of the cutter.
  • Aluminum structure - A lightweight aluminum structure will twist under load. A serious tool has to be heavy if it is to be rigid enough for serious work.
  • Small diameter rails - The structure, which you rely on to keep the follower and cutter true to each other will twist and deform, leading to poor reproduction.
  • Too many parts - Excessive hinges, pins, bolts, and adjustments, each of which add additional play and error.
  • Fails the deflection test - Place a one inch cube of wood under the follower and press down on the router. The router should not deflect downward.



To make up for construction deficiencies, some carver makers will shorten the carriage rails to reduce the impact the flexing of these parts has on accuracy. The resulting undersized carving area requires multiple adjustments and re-setups to copy a piece. Our patented "H" design lets you carve in a 1280 cubic inch volume for the 9" model and a whopping 3670 cubic inch volume for our 18" model--with no re-setups.

Allred and Associates, Inc.
321 Route 5 West, PO Box 321
Elbridge, New York 13060
p: 315.252.2559   f: 315.252.0502