Encoder signal
A weak or noisy encoder signal causes speed ripple.
Guide
Pressure or speed fluctuation on a servo injection moulding machine
Unstable pressure or speed can come from the servo motor, the encoder, the drive or the pump. Check encoder cable and connectors first, then have the motor and drive tested together on a bench.
01Guide
Pressure and speed fluctuation
Drive tuning
Gains or limits changed after a motor swap can cause hunting.
Mechanical wear
Coupling or bearing wear shows up as fluctuation.
Motor and drive together
Star tests both so the fault is not moved from one to the other.
02FAQ
Questions
Is fluctuation always a motor fault?
No. It can be the encoder, the drive, the cable or the pump. A combined test finds the cause.
Do you repair servo drives?
Yes. See the servo drive repair page.
How do I send details?
WhatsApp the nameplate photo and a short description to +91 97866 22233.
Are you the machine maker?
No. Star Automations is an independent multi-brand repair company, not an OEM or authorised service centre. Brand names only describe the equipment we repair.
Send the nameplate photo and the fault
WhatsApp a photo to +91 97866 22233, or email info@starautomations.com.