Hydraulic Pump Calibration: Model and Measurement Requirements

How to manually pump calibration

There is no universal manual pump-calibration voltage or forced-output sequence for every injection molding machine. The machine, controller software, pump/drive and hydraulic configuration determine the applicable procedure. This page explains the information needed for a service review rather than supplying live calibration commands.

Identify the Exact System

  • Machine model, serial identification and the installed hydraulic configuration.
  • Controller and software version, pump/drive identification and relevant parameter definitions.
  • The manufacturer-approved service procedure and its revision.
  • Existing configuration and calibration records, the reported symptom and changes preceding it.

Separate Command Signals from Measurements

An analog-output voltage is a command signal; it is not itself a flow or pressure measurement. A controller’s percentage, display index or linear-table point needs a documented definition and reference. Screw speed or another displayed proxy must not be assumed to be direct hydraulic flow without the applicable method and configuration.

Agree on the instruments, measurement points, traceability, operating conditions and acceptance limits specified by the service procedure. Check whether the controller reports a requested, calculated or measured value.

Define the Service Work and Records

Calibration work must follow the selected machine’s service requirements, including authorized personnel, work mode, stored-energy and movement controls, and the supplied protective devices. Use the approved procedure for any live measurement or output command; do not derive it from a generic article.

Record the original configuration, instrument identification, conditions, actual observations, authorized changes and final verification. Confirm the required configuration backup and recovery method before work, and preserve the accepted result.

Questions to Resolve Before Work

Can the Same 9 V or 4 V Values Be Copied to Another Machine?

No. Those example values do not establish the correct command range or calibration method for another controller, pump or configuration. Obtain the applicable procedure.

Does a 100% Flow Display Prove Correct Calibration?

Not by itself. Confirm the display definition, reference and actual measurement method, and verify the result against the documented acceptance limits.

For general equipment selection rather than calibration instructions, see the sliding-table model guide and machine selection checklist. Provide the model-specific records when requesting technical service.