The only expendable component of the AxiDraw is the small, blue pen-lift servo motor. They do wear out over time but are straightforward to replace. For heavy duty applications, you may wish to keep a spare on hand. This replacement servo motor has been calibrated to the correct range, has the extended servo horn attached, and is ready to install. Includes a few cable ties to keep things neat. Compatible with: AxiDraw V3 AxiDraw V3/A3 AxiDraw SE/A3 AxiDraw V3 XLX Custom assembled AxiDraw models

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The EiBotBoard ('EBB') is a USB-based dual stepper motor controller board that is useful for many general purpose robotics applications. Originally designed for the EggBot project, it is the 'brain' of all current models of the EggBot, but also of the AxiDraw and WaterColorBot as well. The EBB was designed by Brian Schmalz of Schmalz Haus LLC. It is an open source (in both hardware and software), PIC18F46J50-based motor controller board. Standard features include two Allegro A4983 16X microstepping motor drivers for bipolar steppers. It also has a separate onboard regulator to power up to two hobby servo motors. It is 2.2 x 2.2 inches square (5.6 x 5.6 cm). We are currently shipping version 2.7 of the EBB, which features several improvements for reliability. Version 2.7 uses a standard USB micro connector and has a switch that by default turns off power to the pen-lift servo motor after one minute of inactivity. You can change the timeout duration or disable this feature using the serial command protocol. Specifications Motor driver ICs: Two Allegro A4983 Stepper motor type: Bipolar (2) Step size: Full, 1/2, 1/4, 1/8, 1/16 Motor connectors: Screw terminal USB jack type: Micro-B Power connector: Barrel Jack, 2.1 x 5.5 mm, center positive Voltage input range: 9-25 V DC Output current adjustment: 46 mA to 1.25 A per phase Downloads/Documentation GitHub

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Excellent quality, high-torque 'NEMA 17' bipolar stepper motor for all of your motion control needs. Features a 5 mm precision ground shaft with a machined flat. Wiring harness included, various wire lengths available. Useful for all kinds of robotics projects! For example, this is the same stepper motor used in the EggBot kit and AxiDraw. Specifications Motor type: Bipolar stepper motor (4-wire) 1.8 degree step angle (200 steps per revolution) 5 mm output shaft, w/ machined flat 24 mm (0.95 inches) shaft length from screw face plate NEMA 17 form factor 31 mm (1.22 inches) mounting hole distance Mounting screw type: M3 with 3.5 mm min. thread depth 42 mm (1.65 inch) square body size Coil voltage 3.1 V Current 1 A per phase Winding resistance 3.1 ohms per phase Holding torque 1440 g*cm Leads are tinned, wrapped in heat shrink tubing (black or gray) Wire colors: Red and Yellow for the first coil, green and gray for the second coil. Downloads Datasheet

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