ANIG Tractor Drive

The ANIG Tractor Drive (frequently referred to in Coleco community newsletters as the Tractor Feed Drive or attachment) was a third-party mechanical upgrade distributed by the ADAM National Interest Group (ANIG). It was designed to resolve a major limitation of the Coleco ADAM’s stock printing hardware.

The Problem It Solved

The system's mandatory SmartWriter Daisy Wheel Printer came standard with simple friction feed rollers. While sufficient for single sheets of paper, friction feeding was notorious for slipping during long printing jobs. This misalignment caused text to drift, making it incredibly tedious to print multi-page documents, programming source code, or continuous financial sheets.

Coleco heavily advertised an official "Tractor Feed" snap-on accessory during their prototype stage to handle continuous-feed fanfold paper. However, due to financial struggles and the system’s swift discontinuation in 1985, Coleco never released it to the public.

The ANIG Hardware Fix

To fill the void left by Coleco's canceled accessory line, ANIG sourced and manufactured an aftermarket mechanical tractor drive mechanism.

• The Design: The unit leveraged the physical mounting slots located on the upper chassis of the original SmartWriter printer housing (where the small plastic "printer blanks" normally sit).
• The Function: It featured a set of adjustable, spiked gears (sprockets) that locked directly into the holes of standard 9.5-inch continuous fanfold paper.
• The Result: As the printer's roller advanced, the tractor drive pulled the continuous paper smoothly and uniformly, permanently eliminating paper slippage during massive print runs.

Modern Rarity & Status

Because it was a niche, mechanical hardware addition distributed solely through mail-order user group catalogs in the late 1980s, the ANIG Tractor Drive is considered extremely rare today. Very few survived intact due to the brittle nature of vintage gears, and they only occasionally surface in bulk retro-computing auction lots