Parker Gemini GV6 / GT6 Drive Repair Service
Component-level repair for the complete Parker Compumotor Gemini family — GV6 and GV6K digital servo drives and GT6 and GT6K microstepping drives. Fast 5–30 day turnaround, 24–72hr rush available. 2-year warranty on every repair.
Parker Gemini Series — Overview
The Parker Compumotor Gemini series (now part of Parker Hannifin's Electromechanical Automation division) is a family of compact digital drives sharing a common platform. The Gemini GV6 is a high-performance digital servo drive for brushless servo motors, while the Gemini GT6 is a microstepping drive for two-phase stepper motors. The "K" variants — GV6K and GT6K — add a built-in stand-alone indexer with stored motion programs and onboard I/O.
Gemini drives are widely deployed in packaging, semiconductor, medical-device, labeling, and OEM machinery across North America. Now that the Gemini line is legacy/obsolete, component-level repair is the fastest and most cost-effective way to keep these machines running. Flexa Systems repairs the original hardware — power stage, gate drivers, DC bus, control board, and feedback interface — using parts sourced from authorized distributors. No board swaps, no guesswork.
| Product Family | Parker Compumotor Gemini (GV6 / GV6K / GT6 / GT6K) |
| GV6 / GV6K | Digital servo drive for brushless servo motors |
| GT6 / GT6K | Microstepping drive for 2-phase stepper motors |
| "K" Variant | Built-in indexer — stored programs & onboard I/O |
| Input Power | Single-phase 120/240V AC (model dependent) |
| Continuous Current | Model dependent (e.g. U3E / U6E / U12E ratings) |
| Feedback | Encoder / resolver (servo); open-loop & encoder (stepper) |
| Communications | RS-232 / RS-485, configured via Motion Planner software |
| Status | Legacy / obsolete — repair recommended over replacement |
Common Parker Gemini Failures We Repair
Gemini drive failures require precision component-level repair — not board swaps that lose calibration and stored programs.
Output Power Stage / IGBT Failure
Shorted or open output transistors cause overcurrent faults and complete drive shutdown. We test and replace power-stage components at component level and verify output under load with a matched servo or stepper motor.
Gate Driver Circuit Failure
Failed gate driver ICs cause erratic motor behavior, overcurrent trips, and output phase loss. We replace gate driver components and verify switching waveforms with an oscilloscope before returning the drive.
DC Bus Capacitor Degradation
Aging bus capacitors cause bus voltage faults, erratic motion, and drive lockout — common on older Gemini units. We replace all bus capacitors with matched components and verify bus stability under load.
Control Board / DSP Failure
Processor or DSP failure causes configuration loss, communication errors, or a completely unresponsive drive. Board-level repair restores full functionality while preserving stored programs (GV6K/GT6K) where possible.
Feedback / Encoder Interface Failure
Encoder or resolver feedback circuit failure causes position errors, runaway faults, and loss of closed-loop control on GV6 servo drives. We repair the feedback input circuitry and verify signals before load testing.
RS-232 / RS-485 Comms Failure
Communication hardware faults block Motion Planner connection and host control. We repair the serial interface circuitry and verify RS-232/RS-485 communication and program upload/download before shipping.
Parker Gemini Models We Repair
We service the complete Gemini servo and stepper lineup, including the GV6K/GT6K indexer variants. Don't see your exact part number? We repair them all.
| Model | Type | Relative Rating | Typical Use |
| GV6-U3E | Servo drive | Compact / lower current | Small brushless servo axes, light packaging & medical machinery |
| GV6-U6E | Servo drive | Mid current | General-purpose single-axis servo motion |
| GV6-U12E | Servo drive | Highest current | Higher-torque servo axes, demanding cycle rates |
| GV6K-U3E / U6E / U12E | Servo + indexer | Same frames as GV6 | Stand-alone servo motion with stored programs & onboard I/O |
| GT6-U5 | Stepper drive | Lower current | 2-phase microstepping for indexing & positioning |
| GT6-U10 | Stepper drive | Higher current | Larger 2-phase steppers, higher holding torque |
| GT6K-U5 / U10 | Stepper + indexer | Same frames as GT6 | Stand-alone stepper motion with stored programs |
Relative ratings shown for orientation only — confirm the exact current and voltage on your unit's label. Send us your part number for a precise repair quote.
Servo Drives We Stock & Repair
No Gemini units are currently in stock, but we keep tested, refurbished servo drives from leading brands — all backed by our 2-year warranty. Need a Gemini replacement path? Ask us.
How Parker Gemini Repair Works
From the moment we receive your drive to the moment it ships back
Free Diagnostic
Ship your Gemini GV6/GT6 drive to us. Full component-level diagnostic within 24–48 hours of receipt. No charge, no obligation.
Written Quote
Detailed repair quote specifying what failed and what we'll replace. Approve before any work begins.
Component Repair
Board-level repair of power stage, gate drivers, capacitors, and feedback circuitry. Stored programs preserved where possible.
Load Test & Ship
Full load testing including motion verification. Ships same day testing passes, with a 2-year warranty.
Parker Gemini Repair — FAQ
Answers to the most common questions about our Parker Compumotor Gemini GV6 / GT6 servo and stepper drive repair
The Gemini series is obsolete — can you still repair mine?
Yes — this is exactly why customers come to us. Parker discontinued the Compumotor Gemini line years ago, leaving plants with no factory replacement path. Component-level repair lets us restore the original drive — power stage, gate drivers, DC bus capacitors, control board, and feedback circuit — with parts we source from authorized distributors. If your GV6, GV6K, GT6, or GT6K has gone down, repair is the fastest and most cost-effective way back to production.
What is the difference between the Gemini GV6 and GT6?
The GV6 is a digital servo drive for closed-loop brushless servo motors, while the GT6 is a microstepping drive for two-phase stepper motors. The GV6K and GT6K add a built-in stand-alone indexer with stored motion programs and onboard I/O. We repair all four variants, including the U3E, U6E, U12E (servo) and U5, U10 (stepper) frame sizes.
Will my stored Gemini programs and configuration be preserved?
Wherever possible, yes. Component-level repair restores the original hardware without wiping stored programs on GV6K/GT6K indexer drives. We always recommend keeping a backup of your Motion Planner program file before shipping. If a control board has lost its memory, we'll let you know in the diagnostic so you can reload your program after the repair.
How long does Parker Gemini repair take?
Standard turnaround is 5–30 business days depending on parts availability for these legacy drives. Rush service is available for production-critical situations with a 24–72 hour turnaround. We run a free diagnostic within 24–48 hours of receipt and provide a written quote before any repair work begins.
Do you sell replacement Gemini drives, or only repair?
Because the Gemini line is obsolete, repairing your existing unit is usually the best option. If your drive is beyond economical repair, we can help you identify a suitable modern servo or stepper replacement and stock tested servo drives from other leading brands. Contact us with your application details and we'll recommend the right path.
What is your warranty on Parker Gemini repairs?
Every Parker Gemini repair is backed by a 2-year warranty on parts and labor for the repaired fault — industry-leading versus the typical 12-month OEM warranty. We also offer a no-fix, no-charge guarantee: if we cannot repair the drive, you owe nothing for the repair work — only return shipping. See our full warranty policy.
Ready to Get Your Parker Gemini Drive Repaired?
Free diagnostic evaluation, no obligation. Most repairs returned in 5–30 days. Rush service available in 24–72 hours for critical equipment.