This upgrade kit, compatible with most AxiDraw V3 and AxiDraw SE family machines, replaces the standard pen-lift motor with a remarkably strong and fast brushless servo motor. It's a substantial performance and reliability upgrade, lifting and lowering your pen up to 100% faster, and making frequent servo motor swaps a thing of the past. It also includes a spring kit that gives your AxiDraw the option to use traditional ballpoint pens and other implements that require substantial pressure to write.

The upgrade includes the brushless servo motor fitted with a custom aluminum lift-arm (servo horn) that features a rolling wheel. It also includes an upgraded power supply for the AxiDraw and a power supply adapter that gives a new motor power switch to the AxiDraw and improves cable management. The upgraded pen-lift stage can be used with or without the included spring kit, at your choice depending on what type of pen you are using. 

Advantages of using this servo motor upgrade versus standard (Tower Pro SG-90) servo motors:

• Much faster; reduces plot time for plots that have a lot of pen lifting and lowering.
• Much stronger; greater lifting capacity. Can lift heavier pens.
• Much longer life; better reliability.
• Upgraded power supply helps deliver performance at higher speeds.
• Can optionally be used with included spring kit to provide pressure to write with ball point pens.
• A more professional final appearance, with its nice all-metal case.
• Long lasting, replaceable roller wheel on the aluminum lift arm reduces friction and wear.
• New AxiDraw power switch and light added with power adapter module.
• Integrated strain relief option helps organize cables, pointing them towards the back of the AxiDraw

Disadvantages:

• Costs more.
• Heavier; can slightly increase "tuning-fork" ringing at faster speeds.
• Potentially louder (overall) than a regular servo, due to noise of pen hitting paper faster.
• Reduced vertical travel range when using spring kit to provide downforce.
• Extra cables visible by the electronics area of the AxiDraw.
• Installing this upgrade is more work than replacing a regular servo motor.
• Certain tools are needed to install the upgrade; you may need to get them (see above).
  
  As compared to the coreless servo upgrade for AxiDraw, the coreless servo is quieter, less costly, and easier to install. This brushless servo upgrade is much faster, much stronger, much longer lasting, and comes with the power supply upgrade and spring kit.

• AGF A20BHS brushless servo motor, custom programmed and customized with shorter wire leads. The AGF A20BHS brushless servo motor has a full metal gear train, dual ball bearings, and a full machined aluminum case.
• Pre-installed custom aluminum lift-arm (servo horn) with rolling wheel
• Universal input 9 V, 2.5 A power supply (US plug or International multi-plug)
• Power adapter module with integrated power switch and indicator light
• Spring kit, with a light and heavy spring
• Cable ties, screws, and plastic rivets for mounting
• For models that include it, a new black servo mount

Current installation instructions are available to download here (16 MB PDF).