QuantumDrive-4000 Manual 5
91-0027 Rev. E
Copyright © Nutfield Technology, Inc.
6/2010
Ground Connections
IMPORTANT! Proper grounding is required for good performance.
For the highest performance in two axis configurations, it is highly recommended that both servo
drives have their grounds tied together as shown below. This will reduce cross talk between servo
drives. Cross talk is a phenomenon that occurs when one servo drive demands a large amount of
instantaneous current, causing the other drive to have a ground imbalance. The result is unintentional
movement of the other galvanometer causing undesirable marking. Please follow the instructions
below to eliminate this issue.
1) Attach a heavy gauge wire between both X and Y servo drives.
2) Confirm R97, the mounting hole ground connection is shorted on both boards.
3) Do not attach metal hardware to chassis through this hole or you will develop a ground loop.
4) If using the grounding hole for mounting, be sure to use plastic hardware to insulate the servo
ground from chassis ground at this point.
RELEAS
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