OpenBuilds ACRO Z Axis

thingiverse

This is a Z-Axis for OpenBuilds ACRO system. I designed it with several key requirements in mind: * It had to be sturdy enough to carry a small drill. I use the drill to make small holes (2mm in diameter, 15 mm deep) in plywood or MDF, which was very important to me. This is why I tried to get the drill as close as possible to the 20x40 bar. * Simple tool changing was also crucial. For example, I want to quickly switch from using a drill to a laser. * The design should not deviate too much from the original ACRO system. * Most parts should be 3D-printable or easily sourced. I am very happy with how it turned out and hope you like it too. ### Hardware BOM I bought all the hardware, except for M3 screws, M4 screws, and couplers on openbuildsstore.com. It cost me about $80 + shipping. Main Z-Axis Body: * 2 x V-Slot 20x20 Linear Rail, Length: 124mm * 1 x 8mm Metric Acme Lead Screw, Length: around 140mm, depending on the motor * 3 x Screws M3, Length: 35 - 40 mm. This also depends on the motor * 1 x 5mm to 8mm Flexible Coupling * 4 x Aluminum Spacers, Size: 3mm * 2 x Precision Shim - 10x5x1mm * 8 x Low Profile Screws M5, Length: 35mm * 4 x Low Profile Screws M5, Length: 10mm * 12 x Tee Nuts - M5 * 4 x Self Tapping Screw Gantry: * 1 x Nut Block for 8mm Metric Acme Lead Screw * 2 x Eccentric Spacer, Length: 6mm * 2 x Aluminum Spacers, Size: 6mm * 4 x Xtreme Mini V Wheel Kit * 4 x Low Profile Screws M5, Length: 27mm * 2 x Low Profile Screws M5, Length: 25mm * 4 x Screws M4, Length: 12mm