Precision Motion · Encoder Services
Signal loss or unstable position feedback can disrupt an axis. GK-SEMI repairs supported rotary and linear encoder assemblies and helps assess matching replacements where needed.
Symptom & Repair Protocol
We repair serviceable readhead electronics, feedback cables, connectors and optical contamination faults; damaged scales may require replacement.
A repairable readhead or connector fault may avoid replacing the complete wafer-stage scale.
A full scale or motor replacement can add mounting, referencing and interface work.
We repair serviceable feedback circuits and connectors, using checks suited to incremental, analog or absolute interfaces.
Optical contamination can weaken the readhead response.
We clean accessible optics and contacts on serviceable units; damaged gratings can be matched for replacement.
Battery-backed multi-turn position can be lost after backup-power failure.
We inspect serviceable battery connections and coordinate reference recovery with the installed controller.
Reference-mark faults may interrupt homing.
We repair accessible reference-signal connections and check the corresponding feedback response.
Component-Level Expertise
Keep the original scale in service when the readhead or connection can be restored.
Clean accessible optics and repair serviceable readhead contacts; sealed or damaged elements may need replacement.
We check the supported incremental or absolute interface; final axis referencing remains machine-side.
The wafer stage halted with a "Signal Amplitude Error". A complete scale replacement had been considered, bringing additional parts cost and installation work.
Inspection traced the intermittent feedback to oxidized connector contacts rather than a damaged scale.
The affected contacts were cleaned and re-seated, and the encoder response was checked using the applicable interface. This addressed the connector fault without replacing the whole scale assembly; any machine-side reference check remained dependent on the installed control.
Technical & Commercial FAQ
Answers for engineers and purchasing teams evaluating repair risks, lead times, and outcomes.
We assess supported rotary and linear feedback assemblies, including signal electronics, connections and optical-readhead issues depending on the construction.
Yes, the repair assessment considers the actual interface. Incremental A/B/Z, analog sin/cos and absolute serial interfaces require different validation methods.
Some contamination and connector problems can be corrected after inspection. Damaged scales or optical elements may require another repair route or replacement.
Not necessarily. Original mounting, reference positions and absolute-data handling depend on the encoder and controller design. Machine-side homing or calibration may still be required.
Repairing a serviceable original encoder may preserve connector, mechanical fit and feedback compatibility on a mature motion axis.
We can investigate a matching encoder or associated motion-system part when the original unit is beyond repair.
The appropriate output or communication response is checked against the specific encoder interface and available test setup; we do not apply one waveform standard to every encoder.
The encoder type, optical or electronic damage and availability of replacement components determine the proposed scope.
Share the encoder identification, machine axis, alarm and any recent change in signal behavior or handling damage.
Restore Your Feedback
Share the encoder type and fault. We can discuss readhead, cable or interface repair before replacing the assembly.
Discuss Your Encoder Fault ↗