Heidenhain – Acu-Rite

Heidenhain – Acu-Rite
For nearly 50 years, the Acu-Rite brand has represented the finest quality readout systems, precision glass scales and CNC controls along with a world class service and support network. With a broad range of products, all designed and manufactured in the USA, our Jamestown, New York facility is ISO 9001 certified.
Digital Readout Systems
DRO100 Digital Readout
The most cost-effective, entry-level digital readout system that incorporates display technology, the DRO100 offers features and versatile software. Designed and manufactured in the USA, ACU-RITE readouts are the first choice of machine tool builders and users alike.
Dynamic Zoom
- The currently moving axis can be geographically highlighted.
- In “dynamic zoom” mode, the position value is zoomed to its maximum size depending on the number of digits.
- This greatly improves legibility—especially from a great distance.
Installation Guide
- When you switch on the digital readout for the first time, the DRO100 supports you with an installation guide.
- You are led step by step through the most important settings until the device is ready for operation.
Day/Night Switching
- Depending on the ambient-light conditions at the machine, you can switch the screen of the DRO100 to a light or dark background.
Specifications |
»Brochure »Documentation |
Application | Milling, turning, grinding, boring and general purpose |
Axes | Up to 3 |
Encoder inputs | TTL |
Display step |
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Display |
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Status display |
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Functions |
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Error compensation |
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Data interface | USB 2.0 type C
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Options |
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Power connection | AC 100 V to 240 V (±10 %), 50 Hz to 60 Hz (±5 %), ≤ 33 W |
Operating temperature |
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Protection (IEC 60 529) | IP 40, front panel IP 54 |
Weight |
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DRO203 Digital Readout
The most popular digital readout system in the machine tool marketplace, the DRO203 incorporates 7-inch color display technology with versatile software. Designed and manufactured in the USA, ACU-RITE readouts are the first choice of machine tool builders and users alike.
Milling Specific Features
- Bolthole pattern calculations with graphics (full and partial circles/linear patterns)
- Centerline calculation enables you to establish workpiece zero and midpoints
Turning Specific Features
- Lock axis feature
- Instant radius/diameter conversion
- Taper Calculator
- CSS (option)
Dynamic Zoom
- The currently moving axis can be geographically highlighted.
- In “dynamic zoom” mode, the position value is zoomed to its maximum size depending on the number of digits.
- This greatly improves legibility—especially from a great distance.
Day/Night Switching
- Depending on the ambient-light conditions at the machine, you can switch the screen of the DRO203 to a light or dark background.
Installation Guide
- When you switch on the digital readout for the first time, the DRO203 supports you with an installation guide.
- You are led step by step through the most important settings until the device is ready for operation.
Specifications |
»Brochure »Documentation |
Application | Milling, turning, grinding, boring and general purpose |
Axes | 2 or 3 from A to Z and Z0 |
Encoder inputs | TTL |
Display step |
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Display |
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Status display |
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Axis display | Standard |
Functions |
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For turning |
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For milling |
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Cycles | Oblique line, circular arcs; only for milling, drilling, boring:circular and linear hole patterns |
Error compensation |
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Data interface | USB 2.0 type C
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Switching I/O |
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Options |
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Power connection | AC 100 V to 240 V (±10 %), 50 Hz to 60 Hz (±5 %), ≤ 33 W |
Operating temperature |
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Protection (IEC 60 529) | IP 40 (IP 54 front panel) |
Weight |
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DRO300 Digital Readout
The most complete digital readout system in the machine tool marketplace, the DRO300 has full part program capability, 99 tool offsets and multiple DRO displays along with standard input/output capability and edgefinder probe support all on an easy to read 7-inch color display. Designed and manufactured in the USA, ACU-RITE readouts are the first choice of machine tool builders and users alike.
Milling Specific Features
- Bolthole pattern calculations with graphics (full and partial circles/linear patterns)
- Centerline calculation enables you to establish workpiece zero and midpoints
- Edge finder/touch probe input
Turning Specific Features
- Lock axis feature
- Instant radius/diameter conversion
- Taper Calculator
- INCLUDES Thread Assist simplify cutting metric threads on lathes with English leadscrews
- CSS (option)
Dynamic Zoom
- The currently moving axis can be geographically highlighted.
- In “dynamic zoom” mode, the position value is zoomed to its maximum size depending on the number of digits.
- This greatly improves legibility—especially from a great distance.
Day/Night Switching
- Depending on the ambient-light conditions at the machine, you can switch the screen of the DRO300 to a light or dark background.
Installation Guide
- When you switch on the digital readout for the first time, the DRO300 supports you with an installation guide.
- You are led step by step through the most important settings until the device is ready for operation.
Specifications |
»Brochure »Documentation |
Application | Milling, turning, grinding, boring and general purpose |
Axes | 2, 3, and 4 from A to Z and Z0 |
Encoder inputs | TTL |
Display step |
|
Display |
|
Status display |
|
Axis display | Standard |
Functions |
|
For turning |
|
For milling/drilling/boring |
|
Cycles | Oblique line, circular arcs; only for milling, drilling, boring:circular and linear hole patterns |
Error compensation |
|
Data interface | USB 2.0 type C
|
Switching I/O |
|
Options |
|
Power connection | AC 100 V to 240 V (±10 %), 50 Hz to 60 Hz (±5 %), ≤ 33 W |
Operating temperature |
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Protection (IEC 60 529) | IP 40 (IP 54 front panel) |
Weight |
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Linear Encoders
SENC 50

As the result of its extremely compact dimensions, the SENC 50 linear encoder in many different types of applications and situations. It is especially suitable if the installation space is limited or otherwise restricted.
- Compact dimensions
- Resolutions from 0.5 µm to 5 µm
- Output signals: TTL
- Measuring lengths from 25mm/1” to 500mm/20”
- Distance-coded reference marks
Specifications |
»Brochure »Documentation | ||
Measuring standard | Glass scale with incremental graduation | ||
Accuracy grade | ± 3 µm | ||
Measuring length ML Metric | Mounting spar optional 50 75 100 125 150 175 200 225 250 275 300 325 350 375 425 475 525 |
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Measuring length ML Inch | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 18 20 | ||
Incremental signals | TTL | TTL x 5 | TTL x 10 |
Grating period Integrated interpolation |
20 µm without |
20 µm 5-fold |
20 µm 10-fold |
Signal period | 20 µm | 4 µm | 2 µm |
Measuring step | 5 µm | 1 µm | 0.5 µm |
Reference marks | Distance-coded | ||
without load | 5.1 V ± 0.1 V/< 180 mA | 5.1 V ± 0.1 V/< 220 mA | |
Electrical connection | Cable in metal armor, with 9 pin D sub connector; length: 3 m | ||
Cable length | ≤ 6 m (total length with ACU-RITE cable) | ||
Traversing speed | ≤ 60 m/min | ||
Required moving force | ≤ 2.2 N | ||
Operating temperature | Temperature 0 to +50 °C; humidity 25% to 95% (no condensation forming) | ||
Storage temperature | Temperature –20 to +70 °C; humidity 20% to 95% (no condensation forming) | ||
Protection EN 60 529 | IP 53 when mounted according to the mounting instructions | ||
Weight | 0.5 kg + 0.3 kg/m measuring length |
SENC 150

The SENC 150 from ACU-RITE is the ideal scale for all applications.
The compact and robust design, and the numerous possibilities for mounting, make it ideal for retrofitting. The slight dimensions and high accuracies of this ball-bearing guided encoder, which uses the reflected light method, are ideal prerequisites for use in metrology applications.
- Robust design
- Resolutions from 0.5 µm to 5 µm
- Output signals: TTL
- Measuring lengths from 75 mm/2” to 3075 mm/120”
- Distance-coded reference marks
Specifications |
»Brochure »Documentation | ||
Measuring standard | Glass scale with incremental graduation | ||
Accuracy grade | ± 5 μm | ||
Measuring length ML Metric | Mounting spar optional 75 100 125 150 175 225 275 300 325 350 375 400 425 475 525 625 675 725 775 825 875 925 950 1000 1050 1100 1250 1350 1400 1550 |
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Mounting spar included in items supplied 1675 1850 2000 2150 2300 2575 2825 3075 |
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Measuring length ML Inch | 2 4 6 8 10 12 13 14 16 18 20 24 26 28 30 31.5 32 35 36 38 40 42 48 52 54 60 65 72 78 84 90 100 110 120 | ||
Incremental signals | TTL | TTL x 5 | TTL x 10 |
Grating period Integrated interpolation |
20 μm without |
20 μm 5-fold |
20 μm 10-fold |
Signal period | 20 μm | 4 μm | 2 μm |
Measuring step | 5 μm | 1 μm | 0.5 μm |
Reference marks | Distance-coded | ||
without load | 5.1 V ± 0.1 V/< 180 mA | 5.1 V ± 0.1 V/< 220 mA | |
Electrical connection | Cable in metal armor, with 9 pin D sub connector; length: 4 m starting from measuring length 1250 mm: length 6 m |
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Cable length | ≤ 10 m (total length with ACU-RITE cable) | ||
Traversing speed | ≤ 60 m/min | ||
Required moving force | ≤ 3.4 N | ||
Operating temperature | Temperature 0 to +50 °C; humidity 25% to 95% (no condensation forming) | ||
Storage temperature | Temperature –20 to +70 °C; humidity 20% to 95% (no condensation forming) | ||
Protection EN 60 529 | IP 53 when installed according to mounting instructions | ||
Weight | 0.65 kg + 0.7 kg/m measuring length |
MILLPWRG2 Control Systems
Powerful yet easy to operate
CNC retrofit systems for knee
mills and bed mills.
Faster set-ups, shorter run times and a major boost in productivity are just one “powerful easy” retrofit away. Our new MILLPWRG2 control and retrofit kits can turn just about any knee mill into a powerhouse money-maker.
USB and Ethernet compatible, it features a bright 12.1″ high resolution display, 1 GHz processor and plenty of programming capabilities – estimated runtimes, expanded tool/datum offsets, enhanced tool paths, plus a DXF converter.

Check out the new features:
- USB + Ethernet compatible
- Simplified navigation that eliminates multiple menu screens
- Upgrades available for all legacy MILLPWR models
- 12.1″ high resolution display with 3D graphics
- 1 GHz processor
- Available off line software
- Estimated runtime feature
- Expanded tool / datum offsets

What’s new and improved with the Acu-Rite MILLPWRG2:
NEW! MILLPWRG2
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MILLPWR
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»Brochure »Documentation | ||
External Storage | USB / Ethernet (RS-232) | Floppy / Compact Flash Remote Storage (RS-232) |
Internal Storage | 2.5 GB Flash (User) | 512 MB Flash (Code & User) |
Processor | 1 GHz Celeron® M | STPC 100 |
Display | 12.1″ 1024 x 768 |
10.4″ 640 x 480 |
Windows Off-Line Programing Station | ✓ | |
Program Preview | ✓ (Listed & Graphic) |
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Filename Filter Search | ✓ | |
File Manager Navigation | Tree | Menu & Sub-menus |
Estimated Machining Time | ✓ | |
Auto Save (Program) | ✓ | |
Program Size Limit | 9,999 Steps | 999 Steps |
G Code Program | ✓ Extended Support Plus G80 Series Drill Cycles |
✓ (No Edit Capability) |
Block Form Solid Model 3D Graphics | ✓ (w/ User Override) |
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Program Step Navigation | Hard Keys & Pop-up Menu | Hard Keys & Soft Key Paging |
Custom Pocket & Islands | ✓ (Ramp Feed & Optimized Path) |
✓ (Plunge Feed) |
Circle (Pocket, Frame, Ring, Helix | ✓ (Ramp Feed) |
✓ (Plunge Feed) |
Tool Library | ✓ (Specify by Tool Number) |
✓ |
Multiple Datum’s (Fixture Offsets) | 99 | |
Graphic View | Line / 3D Shaded | 2D |
Error Compensation | Linear & Bidirectional Non-linear | Linear |