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Pacific Scientific Motors and Drives: Buy, Repair, and Replacement Services
Contact Wake Industrial TODAY by calling 1-877-407-7934, sending an email to sales@wakeindustrial.com, or by filling out the quote form on this page to receive a comprehensive, industry competitive quote. Pacific Scientific motors and drives remain installed in motion-control systems that depend on precise torque, speed, and position control. When one of these components fails, selecting the correct repair or replacement requires more than matching a general series name. Current rating, feedback type, winding, cooling method, shaft configuration, connectors, and factory-assigned options can all change within the same product family.
Wake Industrial is a premier source for buying, repairing, and replacing Pacific Scientific automation equipment. Available services include but are not limited to the SC900 and SCE900 servo drives, 6410 stepper drives, S Series brushless motors, permanent magnet DC motors, and PowerPac K stepper motors. When requesting a quote, provide the complete product number from the unit’s nameplate so the exact configuration can be evaluated.
Pacific Scientific SC900 and SCE900 Servo Drive Repair
The SC900 family consists of single-axis, resolver-based servo drives designed for three-phase brushless permanent magnet motors. The control platform uses a digital signal processor for the current loops, software-defined operating parameters, digital auto-tuning, and sinusoidal current control. Resolver feedback provides the motor position and velocity information required for commutation, while the drive can generate an emulated incremental encoder output for other machine controls.
SC900 functionality can be expanded through removable option cards. Available configurations include an RS-232/RS-485 serial interface, a SERCOS fiber-optic interface, and programmable single-axis positioning hardware. A front-mounted status display reports conditions such as motor overtemperature, drive overtemperature, excessive current, output short circuits, bus overvoltage, bus undervoltage, control-voltage loss, feedback problems, and parameter-memory faults. Repeated faults after wiring, cooling, and motor connections have been checked can indicate that the drive requires component-level evaluation. Wake Industrial provides SC900 and SCE900 repair and replacement services for operations that need to return an existing axis to service without redesigning the machine.
Product Number | Series | Manual-Based Current Rating | Manual-Based Power or Configuration |
SC900 | 7.5 A continuous at 25°C with convection cooling; 15 A peak | 2.2 kW continuous output at 240 VAC, three-phase | |
SC900 | 15 A continuous at 25°C with convection cooling; 30 A peak | 4.5 kW continuous output at 240 VAC, three-phase | |
SCE900 | Power level 3: 5.3 A continuous at 25°C; 10.6 A peak | No option card, standard-unit customization code 001, standard firmware code 01 |
Pacific Scientific 6410 Stepper Drive Repair
The Pacific Scientific 6410 converts step and direction commands into regulated winding current for a two-phase stepper motor. It operates from a 24 to 75 VDC supply and provides eight switch-selectable phase-current settings from 0.625 to 5 A RMS. Peak current reaches 7.1 A in microstep operation. A two-phase bipolar power stage regulates the current with 20 kHz chopping to reduce audible switching noise and improve current control.
Selectable step sizes range from full-step operation through 1/250-step decimal resolution or 1/256-step binary resolution. With a standard 1.8-degree stepper motor, this corresponds to as many as 50,000 decimal or 51,200 binary microsteps per revolution. Digital electronic damping addresses instability in the motor’s mid-speed region, while idle-current reduction lowers winding current after motion stops. Step, direction, and enable inputs are optically isolated from the motor-power circuit.
When troubleshooting a 6410, the DC supply should remain between 24 and 75 VDC, including during regenerative deceleration. Motor and cable shorts, incorrect phase-current switches, insufficient cooling, improper step timing, and inadequate heatsinking can produce symptoms that resemble an internal drive fault. Because the supplied hardware manual defines common 6410 platform ratings without decoding the longer suffixes, the complete nameplate number should be supplied to Wake Industrial when requesting a repair or replacement.
Product Number | Input Supply | Selectable Motor Current | Available Step Resolution |
24 to 75 VDC at up to 5 A | 0.625 to 5 A RMS; 7.1 A peak | Up to 50,000 decimal or 51,200 binary microsteps per revolution | |
24 to 75 VDC at up to 5 A | 0.625 to 5 A RMS; 7.1 A peak | Up to 50,000 decimal or 51,200 binary microsteps per revolution | |
24 to 75 VDC at up to 5 A | 0.625 to 5 A RMS; 7.1 A peak | Up to 50,000 decimal or 51,200 binary microsteps per revolution |
Pacific Scientific S Series Brushless Motor Repair
Pacific Scientific S Series motors are six-pole synchronous servomotors that use neodymium-iron-boron rotor magnets. The motor construction includes an anti-cog stator, overtemperature thermistor, high-voltage insulation, sealed bearing arrangement, and TENV housing with IP65 protection. The series includes NEMA 23 and NEMA 34 frame sizes, with optional shaft, brake, feedback, sealing, and termination configurations.
The compact S20 group covers continuous torque ratings from approximately 0.32 to 1.6 Nm and rated speeds as high as 12,500 RPM. The larger S30 group covers continuous torque ratings from approximately 1.9 to 6.6 Nm, with rated speeds reaching 3,900 RPM in supported winding configurations. Available feedback arrangements include Hall sensors, a frameless resolver, and secondary encoder options. Brake selections, Viton shaft sealing, and multiple connector or flying-lead terminations are identified directly in the motor code. Wake Industrial should receive the full code so the original winding, feedback, shaft, brake, seal, and connector arrangement can be maintained.
Product Number | Frame and Stack | Continuous Stall / Peak Torque | Typical G-Winding Rated Point at 240 VAC |
NEMA 34, one stack | 2.2 Nm / 6.2 Nm | 1,800 RPM at 2.2 Nm | |
NEMA 34, two stack | 4.0 Nm / 11.3 Nm | 1,500 RPM at 3.6 Nm | |
NEMA 34, three stack | 5.3 Nm / 15.3 Nm | 1,400 RPM at 4.8 Nm |
Pacific Scientific Permanent Magnet DC Motor Repair
Pacific Scientific permanent magnet DC motors use fixed magnetic fields and a brushed armature to generate torque. Standard construction features include Class H insulation, sealed bearings, a fused commutator, constant-force brush springs, and field-replaceable brushes. Permanent magnet construction eliminates a separately excited field winding, resulting in a comparatively compact motor with a broad controllable speed range.
The product range includes SR TENV motors, SRF TEFC motors, STF washdown motors, EP explosion-proof motors, and BA or BAF low-voltage motors. Available configurations cover 12, 24, 90, and 180 VDC operation, depending on the family. Enclosures, horsepower, continuous current, torque, peak current, mounting frame, overall dimensions, and brush assemblies vary substantially, making the complete model number essential when selecting a service or replacement unit. Brush wear, commutator condition, armature damage, bearing deterioration, and ventilation problems can affect the performance of a permanent magnet DC motor. Repair decisions should account for the original voltage, horsepower, NEMA frame, enclosure, current rating, and duty requirements. Wake Industrial can evaluate Pacific Scientific PMDC motors for repair or help locate a correctly matched replacement when the existing unit cannot be returned to dependable service.
Product Number | Voltage and Output | Enclosure and Frame | Continuous Current and Torque | Peak Current |
90 VDC, 1/4 HP, 1,750 RPM | TENV, NEMA 56C | 2.7 A; 9 lb-in | 54 A | |
90 VDC, 1 HP, 1,750 RPM | TEFC, NEMA 56C | 9.5 A; 36 lb-in | 81 A | |
180 VDC, 1.5 HP, 1,750 RPM | TEFC, NEMA 145TC | 7.8 A; 54 lb-in | 62 A |
Pacific Scientific PowerPac K Stepper Motor Repair
PowerPac K motors are Sigmax hybrid stepper motors offered in standard NEMA mounting dimensions. The model-number system identifies NEMA 34 or NEMA 42 frame size, rotor-stack count, mounting configuration, construction and hookup, winding arrangement, winding type, rotor type, shaft configuration, shaft modification, feedback provision, and special sequence. The K designation identifies the Sigmax construction, while the related N designation identifies the standard construction.
Construction choices include regular leadwire, an MS system connector, and splashproof terminal-board or conduit arrangements. Winding options include four-lead series, four-lead parallel, six-lead, and eight-lead configurations. Shaft selections include single or double-ended arrangements, while available feedback codes identify no feedback, encoder-mounting provisions, or a special factory configuration. These distinctions affect electrical connections and mechanical compatibility even when two motors share the same frame size.
All three examples below are one-stack NEMA 34 motors with heavy-duty NEMA mounting, laminated rotors, single straight-key shafts, no feedback, and a standard no-shaft-seal sequence. Their construction, lead arrangement, and winding type differ. Wake Industrial can evaluate PowerPac K motors for repair or provide a matching replacement based on the complete code from the original motor.
Product Number | Frame and Stack | Construction and Winding | Shared Shaft and Feedback Configuration |
NEMA 34, one stack | Splashproof terminal-board construction with metric conduit connection; four-lead parallel; J winding | Laminated rotor, single shaft, straight key, no feedback, no shaft seal | |
NEMA 34, one stack | Regular leadwire construction; four-lead series; G winding | Laminated rotor, single shaft, straight key, no feedback, no shaft seal | |
NEMA 34, one stack | Regular leadwire construction; four-lead series; L winding | Laminated rotor, single shaft, straight key, no feedback, no shaft seal |
Buy, Repair, or Replace Pacific Scientific Equipment
A failed Pacific Scientific component does not automatically require a machine redesign. Wake Industrial provides buying, repair, and replacement options for legacy servo drives, stepper drives, brushless motors, permanent magnet DC motors, and hybrid stepper motors. Providing the complete product number and a description of the failure helps determine whether repair or replacement is the more practical path. Contact Wake Industrial through the quote form, send an email to sales@wakeindustrial.com, or call 1-919-443-0207 to request pricing for a Pacific Scientific motor or drive. Include the full nameplate code, the machine’s reported fault or symptom, and whether you want a repair quote, replacement quote, or both.
