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ZBot & Orbitran Semiconductor Robot Service & Refurbishment

Semiconductor Robots

USDD is the only authorized service center for Zbots.

US Digital Designs is the only authorized sales and service center for the Brooks Automation ZBot and Orbitron wafer transfer robots.

Our rebuild & enhancement program extends the life of your investment.

US Digital Designs provides support for the Brooks Automation Orbitran, ZBot and ZBot II wafer transfer robots, as well as our own improved model, the ZBot II+.

Need assistance with your semiconductor robots? We’re here to help!

Call us at 877.551.USDD or send us an e-mail at sales@usdd.com to get started.

We don’t just fix it. We make it better.

ZBot I

The original ZBot, with cover removed

Are you experiencing any of these common issues with your Orbitran or ZBot robots?

  • Z-Axis and Theta drive motors fail
  • Extend/Retract motors and transmissions fail
  • E/R  cable harness assembly have problems
  • Wafer Detection / Vacuum PCB problems
  • Main (Through Body) wiring harness
  • Reduction gear assembly wears out
  • Repeatability and accuracy shortcomings
  • Unacceptable downtime
ZBot II+

Improved ZBot II+ by US Digital Designs

We’ve partnered with Brooks Automation, Inc. to tackle these problems head-on, and our collaboration has resulted in a totally revitalized ZBot product line. ZBot customers who work with USDD to refurbish their units report minimal downtime, decreased turn time, and increased satisfaction.

When we refurbish your ZBot, we enhance the unit to meet our own design-improved specifications for that particular model. Alternately, you can choose to replace your ZBot I or ZBot II with USDD’s ZBot II+, a new-manufacture unit with improvements that go beyond the upgrades we offer for ZBot II refurbishments.

All ZBot II and II+ units can drop-in replace each other, and the ZBot II+ can drop-in replace the ZBot I.

USDD’s ZBot Design Enhancements

When we rebuild your ZBot, we make significant improvements to extend the life and reliability of every part of the unit. Every design-enhanced rebuild project we do receives the following upgrades:

Improved USDD motor

Note the new larger motor (top), compared to the OEM motor.

Z-Axis & Theta Drive Motors

  • Improved high-torque motors
  • State-of-the-art encoders
  • Premium-quality pulleys

ZBot Extend/Retract Motor

Note the new larger motor and gearbox compared to OEM motor (right).

Extend/Retract Motor and Transmission

  • Low-backlash/high-torque capability
  • Planetary vs. spur gear transmission
  • Premium motor materials for longevity
  • New pulley design

E/R Cable Harness Assembly


OEM E/R Cable Harness Assembly

This image shows the OEM ribbon cables “hacked” to fit the connector application.

USDD's Upgraded E/R Cable Harness Assembly

USDD’s upgraded cable harness assembly comes with a new power distribution circuit board, for a more reliable solution to the problem shown above.

Wafer Detection / Vacuum Board


OEM Vacuum Board

OEM vacuum board

USDD Vacuum Board

USDD’s new design for the vacuum system includes manual overrides, LEDs, and high-efficiency solenoids.

Reduction Gear Assembly

  • New bearing assembly with improved sealed bearings and lubricant
  • Proper bearings pre-load springs for maximum life
USDD Reduction Gear Assembly

USDD’s improved reduction gear assembly

Repeatability & Accuracy

Replacement screws

Accuracy & repeatability issues are primarily the result of worn lead screws. We replace lead screws and bearings with every rebuild.

Linear Slide Bearings

Linear slide bearings are replaced with new bearing system.

Replacement belts

We replace worn old OEM belts with new larger, stronger Kevlar® belts.

Replacement parts

Worn pulleys, radial bearings, and belts are all replaced and properly aligned.

Every USDD Zbot Design Enhancement Rebuild  Includes:

  • All new servo motors: Zeta, Theta, & Extend/Retract
  • OEM wiring harness replaced with power / control distribution system
  • New improved TFE coated precision lead screw
  • New premium pulleys and Kevlar™ belts
  • New linear guide bearing system and rotation bearings (all replaced with premium components)
  • New vacuum system controller board (New vacuum sensor & solenoid)
  • New improved theta pulley reduction gear assembly
  • Precision machining enhancements and alignment of all components
  • Refurbished OEM wafer pans. (New wafer pans are available when necessary)
  • Main Controller PCB service/refurbishment (New controllers PCB’s available)

Semiconductor Robot Quality Assurance

ZBot Test Bench

Our 3-cell ZBot test apparatus

USDD is committed to continuous quality improvement for our ZBot and Orbitran product lines. Our experience and expertise is a definite advantage but the true advances come from our relationships with Brooks Automation Inc., our suppliers, and the robot end users.

Listening and working with the end users is a fantastic source of knowledge. We strive to continuously improve our products by attacking the sources of ware and fatigue. Our test stand apparatuses allow us to test the robots for basic operations or even extreme conditions when necessary.

Every robot spends a minimum of 24 hours on a test bench. We physically pass thousands of wafers, monitoring repeatability, accuracy and reliability. In addition, we can test new ideas to improve the robots under conditions very similar to field operation.