User guide

Acu-Rite Companies Inc.
ENC 250
™
MULTI-SECTION
Components
Each unit should consist of the following boxes:
Scale Section Boxes:
• Right End Section
• Left End Section
• Center Sections (One or more boxes depending on length)
Common Components Box:
• Scale Measuring Tape (Coiled On Spool)
• Lipseals (Coiled On Spool)
• Reading Head
• Mounting Hardware with RTV and Silicone Grease
• Reference Manual
* NOTE: Both English and metric mounting hardware have
been supplied. The mounting instructions reference to both.
Tools required depend on the fasteners being used.
2
Tools
You will need the following tools to complete the
installation:
• 0.001” Dial Indicator with Magnetic Base
• English Hex Wrench Set
• Metric Hex Wrench Set
• Dial Calipers
• Feeler Gage
• Hand Drill
• Hand Tap
• Taps (English): 1/4-20 UNC & #8-32 UNC
• Taps (Metric): M6, M4
• Drills (English): #7 (.201”), #29 (.136”), N (.302”)
• Drills (Metric): 5mm, 3.3mm, 7.7mm
• Reamer (English): .312”
• Reamer (Metric): 8mm
• Transfer Punch Set
• Hammer
• Center Punch
• Phillips Screw Driver
• Flat-tip Screw Driver
• Torque Wrench
Please follow these preparation guide lines.
• Understand your mounting requirements.
• Mount with lip seals down and away from the work area.
• Brackets should be kept as short as possible and rigid.
• Surfaces must be in good condition, clean, and free of dirt.
Remove paint from machined mounting surfaces.
• Locate the machine’s center of travel on the axis that
the encoder will be mounted to. Move the axis to the
center of travel prior to installing the encoder. Mark
a reference line on the axis so that it can easily be
returned to the center of travel.
Measuring length ...
• Machine travel can not exceed the encoder measuring
length.
• Either limit machine travel or obtain correct length scale.
“L”
• Determine the cable exit direction before installing the reading
head.
• To change the cable exit direction; remove the cover plate
and rotate the cable 180°.
Changing cable exit direction ...
Cover plate
T-10 Torx screw (2)
Plug
Armor cable hex crimp
• Encoder lip seals to face away from coolant spray.
Coolant spray ...
Mounting Preparation
“L” = Measuring length + [2.0”] 50.8mm nominal over travel
Travel is limited by stops at each end of scale
[1.0”]
25mm
[2.8”]
71.1mm