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OpenBuilds ACRO 55 20" x 20"

(3 reviews) Write a Review
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"
  • OpenBuilds ACRO 55 20" x 20"



The OpenBuilds ACRO System is the most cost effective and accurate positioning system in its class.

With the Acro System you have the flexibility of attaching many different tool styles from diode lasers to pen attachments to pick and place systems and much more.

Get your ACRO now and put your ideas into motion.

Travel (Work Area)
X Axis 12" (300mm) / Y Axis 12" (300mm) / Z Axis 2 3/4" (~70mm)
Workable Material Height
Variable based on toolhead used
Drive System:
Belt Driven GT2 timing belts
Machine Accuracy
0.003"~0.007" (0.10mm~0.20mm)
20" x 20" (500mm x 500mm)
Choose the size that best fits your needs.
Bundle Contents
Includes all the necessary Parts to assemble your machine. (Complete part list)

V-Slot Linear Rail

ACRO Plates

GT2 14 Tooth Pulley

GT2 Belts

Wiring Kit

Assembly Hardware

Complete your Machine with these popular add-ons.
Motion Control

24V Power Supply

NEMA 17 Stepper Motor

Laser Add On
High quality laser diode system from Jtech. (Sold separately)
INCLUDED at no additional cost - OpenBuilds CAM and CONTROL software is everything you need to get started making or purchase LightBurn solution that also include great features.
OpenBuilds CAM
OpenBuilds CONTROL

LightBurn GCODE Laser Software

Assembly/Support/Documentation/3D Models
Easy follow along assembly video – top notch awesome community support – open source files and documentation and examples.

This design or build includes OpenBuilds®, LLC design work(s) shared Open Source under the CC BY-SA 4.0 License Terms and Conditions

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3 Reviews

  • 5
    order fullfillment

    Posted by Bill Sturgeon on Feb 8th 2020

    Ordered an ARCO 55 for laser engraving. Have not used yet as I am awaiting a laser that I probably should have ordered from OpenBuilds but didn't. Shipment very quickly, very well packed, and extremely well organized into various build packets. Hardware was well marked and everything in the kit was present and accounted for. The OpenBuild assembly instructions on YouTube were excellent. GREAT JOB OpenBuild!

  • 4
    ACRO 55 20"x20"

    Posted by Otto Johansen on Jul 5th 2018

    The kit came with an inventory sheet, which was accurate, and the packaging was more than adequate to protect the components during transit. While there were no instructions included, a bit of searching on the OpenBuilds website produced an assembly video.
    Assembly was fairly easy. Allen wrenches were provided, but you needed to provide your own Philips #2 screwdriver and 8 mm wrench.
    Everything went together easily except for the grub screw/tee nut combination used to secure the timing belts in the rails--these jammed so that they could not secure the belt, and rounded the corners on the 2.5 mm wrench. The same tee nuts easily threaded over the other 5 mm screws, and the grub screws easily worked with the double tee nuts, so the problem was not major nor obvious. The only problem this caused was a delay in assembly to overcome this issue.
    Overall, this kit is a fine platform for any machine that doesn't require much motion in the Z-direction.

  • 4
    ACRO 55 20x20

    Posted by Lance on Jun 29th 2018

    Kit was well packed and labeled and seemed high quality. I followed an on-line video and assembly was smooth. But I expected aluminum plates and eccentric spacers and instead it has acrylic plates with cruder adjustments on the wheels. I was hoping to use this in a higher temperature partial enclosure and the acrylic worries me. Still it was a good value for the $ since it was on sale.

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