CLN17 V3 - Early Access Signup

Apply for CLN17 V3 Early Access

This 20min survey helps us understand how you'll use the driver — your setup, requirements, and edge cases directly inform hardware decisions, firmware priorities, feature support prioritization, usage examples, and who gets the first batch of drivers.

Note: The more detailed your feedback, the more valuable it is for the project. Specific use cases, technical constraints, and real-world scenarios help us build a better product for everyone.

ℹ️ Your Contribution

By participating, you help validate the driver's capabilities, identify improvements, and support the development of this open-source project.

⚠️ Technical Requirements

Basic microcontroller programming skills and experience with ST-Link firmware flashing are required.

🔴 Hardware Risks

While extensively tested, edge cases may exist that could potentially damage the driver under specific conditions.

Section 1 — About You

Basic contact info to reach you about your order and early access participation.

Discord Nickname

Email (backup communication)

Country

Shipping availability varies by region. Some regions may not be supported for this shipping round — you can still fill out this form to be considered for future batches.

Section 2 — Demand

Helps us evaluate demand and set long-term project priorities

How many CLN17 V3 units do you need?

1 2 3 4

Motor add-on: Would you like to include a NEMA17 motor with your order?

Yes, I'd like an assembled motor No, I'll use my own motor Maybe, not sure yet price

A high-quality NEMA17 motor with back-mounted driver will add $15 to each kit

How many Programmer/debugger kits would you like to have (one kit is minimum) ?

1 2 3 4

A USB programmer kit ($10) can be used as a backup firmware flashing tool and fast debug tool

Do you have ongoing demand or plans for a larger batch in the future?

No, this is a one-time evaluation Yes, I expect regular small orders (< 10 units/month) Yes, I'm planning a mid-size batch (25–100 units) Yes, I need large volumes (100+ units) — I'd like to discuss Not sure yet

How soon do you need the driver for your project?

Already need it / ASAP Within 1–3 months Within 6 months No rush, evaluating

What matters most when choosing a motor driver? (Rank 1-5, where 1 = highest priority)

Price 3

1
Highest 2 3 4 5
Lowest

Size / Form Factor 3

1
Highest 2 3 4 5
Lowest

Functionality / Features 3

1
Highest 2 3 4 5
Lowest

Open-Source 3

1
Highest 2 3 4 5
Lowest

Community Support 3

1
Highest 2 3 4 5
Lowest

Ease of Integration 3

1
Highest 2 3 4 5
Lowest

Section 3 — Current Setup & Pain Points

Understanding what you're using now and what frustrates you guides our feature priorities.

What motor driver are you currently using?

TMC2209 / TMC2208 / TMC2226 TMC5160 / TMC5161 DM542 / DM556 or similar closed-loop stepper driver ODrive / Moteus / VESC Custom / self-built Nothing yet — starting fresh

What are you unsatisfied with in your current solution?

Why are you considering CLN17 as a replacement or addition?

Section 4 — Application

Your specific use case determines motor parameters, control modes, and edge cases we need to test.

Primary application area

3D printing (FDM / resin) CNC milling / routing / laser Pick & place / automation Robotics (arm, legged, mobile) Camera slider / gimbal / pan-tilt Medical / lab equipment Telescope / astronomy mount Industrial conveyor / positioner Educational / research

Describe your specific application

Motor type you plan to use

NEMA17 stepper (2-phase) NEMA17 BLDC/PMSM Other low-current BLDC Not sure yet

Motor current range (rated phase current)

Up to 0.5 A 0.5–1.0 A 1.0–1.8 A 1.8–2.5 A Over 2.5 A

Supply voltage range

12 V 24 V 36–48 V Varies / need flexibility

Required speed range

Very slow / high precision (< 10 RPM) Low speed (10–100 RPM) Medium speed (100–600 RPM) High speed (600–3000 RPM) Very high speed (3000+ RPM)

Positioning accuracy requirement

Basic (full/half-step, no encoder feedback) Standard closed-loop (stall detection + correction) Precise (< 0.25° repeatability)

Expected motor power

Under 10 W 10–30 W 30–60 W

How many pole pairs does your motor have?

Number of stable positions / full steps per revolution

What calibration movement is acceptable if motor is already installed?

<1° 1-10° 10-60°

Is safe-start delay after reboot/motor connection acceptable?

1 second 2 seconds 3 seconds Unacceptable

Do you plan to use hot-swapping (switching between motors while powered)?

Yes No Maybe / Not sure

Motor load type

Direct drive Belt (GT2 / GT3 / other) Ballscrew Rack & pinion Worm gear Wheels / differential drive Rotating inertial mass (flywheel, turntable)

Do you use a gearbox / reducer with your motor?

No gearbox Planetary gearbox Belt reducer Harmonic / strain wave gearbox Worm gearbox Planning to add one

Operation mode

Continuous rotation Point-to-point positioning Oscillation / back-and-forth Torque / current control Velocity control Profile following (trapezoid, S-curve) Short-term motor overdrive (peak torque bursts beyond rated current for brief intervals)

Duty cycle / thermal conditions

Occasional short moves Moderate (< 50% on-time) Continuous 24/7 operation High ambient temperature (> 50°C)

Section 5 — System Integration

Defines which interfaces, protocols, and features we prioritize in firmware development.

Host controller / system driving the driver

Raspberry Pi / SBC (Linux) Arduino / AVR STM32 / other ARM MCU Industrial PLC PC (Windows / Linux) Custom / proprietary MCU Standalone — no host (autonomous operation)

Required communication interfaces

STEP/DIR (classic drop-in) UART (serial config/control) CAN bus I²C SPI USB (config tool / real-time control) PWM input ABZ encoder input HAL (Hall sensor) input

Configuration method preference

Serial terminal (CLI) via COM port USB GUI tool (desktop app) Phone app via USB CAN-Bus and other interface APIs Direct register access (API/SDK) No config needed (plug-and-play)

How many axes are in your system?

1 2–3 4+

Required feedback / sensing features

External encoder input Stall detection Current sensing / torque estimation Temperature monitoring Endstop / limit switch input

Closed-loop control mode preference

Closed-loop stepper (position correction, no missed steps) FOC torque control (BLDC/PMSM/Stepper) FOC velocity control FOC position control Gravity compensation Not sure — need guidance

Do you need automatic error recovery or fault-halt behavior?

Auto-recovery (attempt to resume operation) Fault-halt (stop and require manual reset) Configurable (both options available)

Do you use EMI-sensitive equipment nearby?

Medical equipment Precision measurement instruments Audio equipment No EMI-sensitive equipment

How is power organized in your system?

Separate PSU for each driver Common power bus for all drivers Battery / accumulator Mixed topology

Do you plan to daisy-chain power or communication between multiple drivers?

No, I use star topology Yes, daisy-chaining communication only Yes, daisy-chaining both power and communication

Expected wire length between driver and motor?

What should the motor do in case of critical fault (e.g., host disconnect, overtemp)?

Freewheel / disable outputs Active braking / shorting phases Hold current position Configurable behavior

Section 6 — Business Context

Helps us understand commercial needs, support expectations, and long-term commitments.

Do you plan to integrate CLN17 into a commercial product?

No — personal / hobby use only Yes — low-volume commercial product (< 100 units/year) Yes — mid/high-volume commercial product Under evaluation

Would you need a customized driver or custom kit configuration?

No — standard configuration is fine Yes — custom firmware / feature set Yes — custom hardware (connectors, pinout, form factor) Yes — both hardware and firmware customization Not sure yet

Does your project have NDA or confidentiality requirements?

No — fully open Partial — application details are confidential Yes — full NDA required before discussing details

What level of support do you expect?

Documentation only GitHub issues Discord community Direct contact with developer Paid support option

Is long-term supply availability (LTS 5+ years) critical for you?

Yes, critical for commercial product Preferred but not critical Not important

Section 7 — Special Requirements & Final Notes

Captures hardware preferences, missing features, and your honest feedback on the industry.

Connector preferences

Board connectors orientation

Vertical Horizontal No preference

Motor connector type

Screw terminal XH2.54 4P (JST-style) Direct PCB soldering (no connector)

Special hardware requirements

Anything critical missing, or must-have features not listed above?

Are you willing to share test results / media publicly?

Yes, publicly (GitHub, Discord, social media) Yes, privately No — confidential / internal use

What is an absolute dealbreaker for you when choosing a motor driver?

What feature in modern drivers do you think is mostly a gimmick or overrated?

Section 8 — Contribution Type

Determines how you'll participate in the early access program and what value you bring to the project.

How do you want to participate?

Sponsor — financially support the project beyond the driver price Developer — contribute to firmware, tooling, or integrations Tester — test in real applications and provide structured feedback Reviewer — review docs, schematics, or UX User - just use when it will be finished

CLN17 V3 Motor Driver

Package Contents

Standard Kit Includes:

Additionally Required:

Optional Add-ons:

Apply for CLN17 V3 Early Access

Apply for CLN17 V3 Early Access

ℹ️ Your Contribution

⚠️ Technical Requirements

🔴 Hardware Risks

Section 1 — About You

Section 2 — Demand

Section 3 — Current Setup & Pain Points

Section 4 — Application

Section 5 — System Integration

Section 6 — Business Context

Section 7 — Special Requirements & Final Notes

Section 8 — Contribution Type

Submitting Your Application...

Application Submitted Successfully!

⚠️ Submission Error

CLN17 V3 Motor Driver

Package Contents

Standard Kit Includes:

Additionally Required:

Optional Add-ons:

Apply for CLN17 V3 Early Access

Apply for CLN17 V3 Early Access

ℹ️ Your Contribution

⚠️ Technical Requirements

🔴 Hardware Risks

Section 1 — About You

Section 2 — Demand

Section 3 — Current Setup & Pain Points

Section 4 — Application

Section 5 — System Integration

Section 6 — Business Context

Section 7 — Special Requirements & Final Notes

Section 8 — Contribution Type

Submitting Your Application...

Application Submitted Successfully!

⚡ Keep This Project Alive — Support the Development

⚠️ Submission Error