Giddings & Lewis 503-26606-20 MMC 2 Axis Motion Control Unit

Technical Specifications

Model： 503-26606-20

Brand： Giddings & Lewis

Product Type: Rack mount MMC 2-axis motion control unit for PiC900 CNC system

Module Feature:

Function: MMC dual-axis motion control unit for G&L PiC900 platform. It executes real-time position and velocity closed-loop calculation for 2 servo axes, transmits motion commands and collects encoder feedback signals for heavy horizontal boring mills and large machining centers.

Axis capacity: Max 2 servo axes

Signal interface: ±10V analog velocity command output, differential A/B/Z incremental quadrature encoder input

Onboard components: Real-time motion processor, battery backed RAM for axis parameters

LED indicators: OK, READY, COM FAULT, AXIS ALARM diagnostic lights

Hardware self-diagnosis: Encoder signal loss detection, axis tracking error monitoring, analog output overrange check

Programming software: PiCPro for motor parameter configuration, servo gain tuning and module diagnosis

Electrical Parameters

Supply: 24VDC control power

Power consumption: Max 12W

Backup memory: Lithium battery for retaining axis servo parameters when power off

Mechanical & Structure:

Mounting: Cabinet rack slot mount with gold finger connector

Weight: 2.2kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +50℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy PiC900 MMC motion control unit

System compatibility

Compatibility description: 503-26606-20 belongs to Giddings & Lewis PiC900 MMC motion family. Compatible with PiC900 main CPU, analog Centurion servo drives and G&L XSM/FSM series servo motors. Widely installed on heavy G&L horizontal boring mills.

Function

Function description: 503-26606-20 is MMC 2-axis motion control unit manufactured by Giddings & Lewis. It receives trajectory instructions from PiC900 main CPU, runs closed-loop servo algorithm for two axes, outputs ±10V analog speed commands to analog servo amplifiers and reads quadrature encoder feedback to calculate real-time axis position. It is designed for dual synchronized feed axes of heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Disconnect 24VDC rack control power. Insert 503-26606-20 module into rack slot and lock retainer. Wire shielded analog command cables and differential encoder cables. Install backup battery. Configure motor parameters and tune servo gains via PiCPro. Run self-test and verify axis jog, homing and synchronized motion.

Interface

Interface list: Backplane gold finger connector, multi-channel analog terminal block, quadrature encoder ports,on-board OK / READY / COM FAULT / AXIS ALARM LED indicators for Giddings & Lewis 503-26606-20.

Diagnostic

Troubleshooting: AXIS ALARM: Encoder signal missing, mechanical overload or tracking error over limit. COM FAULT: Backplane bus communication error or module address mismatch. Unstable axis movement: Poor cable shielding, ground loop interference or improperly tuned servo gain.

Product Brief

Brief description: 503-26606-20 is Giddings & Lewis legacy MMC dual-axis motion control unit,with analog ±10V command and quadrature encoder feedback for heavy CNC boring mill 2-axis synchronized servo control,discontinued CNC motion spare module.