Evil Mad Scientist Coreless Servo Upgrade Kit for AxiDraw
Enhances performance with a K-power DMC809 coreless servo motor
Reduces noise significantly compared to standard motor
Increases lifespan and lifting capacity for heavier pens
Provides a quieter, more professional operation with less vibration
Features a durable, all-metal construction with a rolling wheel
The Evil Mad Scientist Coreless Servo Upgrade Kit for AxiDraw enhances the performance of AxiDraw V3 and SE family machines by replacing the standard pen-lift servo motor with a superior K-power DMC809 digital coreless servo motor. This motor features a full metal gear train, dual ball bearings, and a machined aluminum case, ensuring a quieter, stronger, and longer-lasting operation. The upgrade includes a custom aluminum lift arm with a rolling wheel and a new mounting bracket for secure attachment.
This upgrade offers several advantages over the original Tower Pro SG-90 motor. It operates with significantly less noise, has a longer lifespan, and provides greater lifting capacity, allowing it to handle heavier pens. Additionally, it exhibits less vibration, particularly at lower speeds, and presents a more professional appearance due to its all-metal construction. The rolling wheel on the aluminum lift arm reduces friction and wear, contributing to its durability.
However, the upgrade does come with some drawbacks. It is heavier, which may slightly increase "tuning-fork" ringing at higher speeds, and it is more expensive. Installation is more complex and requires specific tools, which are not included in the kit. Compatibility with AxiDraw machines should be verified by examining the bracket where the existing pen-lift servo motor is mounted.
Note: Ensure proper installation to avoid potential mechanical issues.
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".