Product Specifications Stepper motor NEMA23 stepper motor Support machines FoxAlien 4040-XE Support software Grbl software Product size 250x190x60 mm/9.84x7.48x2.36 inches Main Features Applicable to Cylindrical Objects The rotary roller module is applied to engraving curved surface and cylindrical objects such as round wood, cup, cans, bottles and glass etc. Fully Assembled The rotary module is fully assembled. No complicated assembly. Easy wiring. The package comes with a detailed and clear manual for using introduction and wiring. NEMA23 Stepper Motor The R57 rotary module uses NEMA23 stepper motor. It is perfectly compatible with FoxAlien 4040-XE for engraving. Using Tips Check the screws on the synchronous wheels in case they get loose during engraving. Make sure screws are tightened. The belt is adjustable. Tighten the belt before using. Otherwise it may lose steps if the belt is loose. Need to change the configuration in the software. Pls follow the user manual. Product Details Adjustable Rollers Capable to Hold Long Object It is capable to hold long objects by relocating the screw poisiton. Adjustable Bracket Package List 1x Rotary roller engraving module1x User Manual1x WireWrench