Can you help me with the 638 servo drive?

Yes, we have some 638 PDF documents available to download below.

The Parker 638 servo drive as used by our Servo-Torq® Mk.3 rotary cutter was manufactured in two types: 1-phase & 3-phase.Three phase versions were used for the cutter servo drive & single phase for the caterpillar infeeders & haul-offs.

If you need to re-install the operating program into the 638 drive we may be able to help.

You will need the Parker supplied EasyRider drive control software installed on a MS-Windows laptop computer.

A copy of the EasyRider software should be on the CD that came with the machine; if not, please contact us.

You will also need a PC<>drive connection cable & the orginal machine software (Parameter file (WDD file type) & BIAS file (WBD file type)).

We aim to retain copies of all specific machine software. If you need a copy of this, please contact us with your serial number (XXXX).

If you need any more assistance please contact our Tech Team via email:

Downloads (PDF):

> 638 Error codes.

> 638 1-ph. User guide.

> 638 3-ph. User guide.

> Service interface - COM1.