Epson ES Series - Calibration

Part 2: Maintenance 9. Replacing the Ball Screw Spline Unit
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9. Replacing the Ball Screw Spline Unit
WARNING
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Only trained personnel should be allowed to maintain this unit.
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When replacing this unit, make sure the power is turned OFF and pull out the
power plug from the power source. Failure to turn OFF the power can result
in electric shock and malfunction.
When the motor and timing belts are removed while replacing the ball screw spline unit, the
mechanical origin position and therefore teach points change. (The mechanical origin
position is offset from the position saved in the Control Unit’s/Controller’s memory.) The
operation to offset the mechanical origin position is called “calibration.”
For calibration, the most suitable point to check the calibration accuracy must be selected
from the teach points. (Refer to chapter 11. Calibration.)
Types of ball screw spline units
There are six types of the ball screw spline unit. Specify the Z code when ordering a ball
screw spline unit for replacement.
Name
Stroke of Joint #3
Specification Old code New code
Ball screw spline unit for Z170
170 mm BNS2020A-385B
ZA001208 R13ZA00120800
Ball screw spline unit for Z320
320 mm BNS2020A-535B
ZA001209 R13ZA00120900
Clean model
Ball screw spline unit for Z150
150 mm BNS2020A-385B+CL
ZA001216
R13ZA00121600
Clean model
Ball screw spline unit for Z300
300 mm BNS2020A-535B+CL
ZA001217
R13ZA00121700
Protected model
Ball screw spline unit for Z150
150 mm BNS2020A-385B+P
ZA001218
R13ZA00121800
Protected model
Ball screw spline unit for Z300
300 mm BNS2020A-535B+P
ZA001219
R13ZA00121900
Location of the ball screw spline unit
Ball screw spline unit
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NOTE