ACRO System Machine Mechanical Kit Laser Engraving Cutting Carving CNC Mill. ACRO System Machine Mechanical Kit. Was developed to be the most accurate and cost effective positioning system in its class. V-Slot system was incorporated and, therefore, the ACRO System has the unique ability to expand to multiple sizes creating a size configuration custom to your needs. ” VSlot ” and ” CBeam ” are registered trademarks of OpenBuilds LLC as released under the Creative Commons. All our components are designed to work and are fully compatible with the products produced by OpenBuilds. 300mmx300mm-1300mmx1300mm / Z Axis 2 3/4 (70mm). Variable based on toolhead used. Belt Driven GT2 timing belts. 0.003″0.007″ (0.10mm0.20mm). Choose the size that meet your needs best. Terms of Sale (VAT). Return must include all original package and accesorries, item must in good condition. We will work with you to until you are satisfied. We will try our best to solve your problem to your satisfaction. We are always here with you! Our working time is 8 :30AM – 6:00PM from Monday – Friday.