Past Meetup

Double Feature - Alden Hart talks TinyG and SLA Printer Demo

This Meetup is past

29 people went

Pumping Station One

3519 N Elston · Chicago, IL

How to find us

We meet at the Pumping Station One hackerspace.

Location image of event venue


First Up.

The CNC Club is a weekly meeting of Chicago area people passionate about learning, building and using digital fabrication equipment. It is held at the Pumping Station One ( Hackerspace. It is open to non members. We also have a Google Group called CNC Build Club. (!forum/cnc-build-club)

Each week we talk about, build, train on and use CNC machines. We have 3D printers, laser cutters, CNC routers and vinyl cutters. This week we have Alden Hart giving a talk on the TinyG

The TinyG project is a multi-axis motion control system. It is designed for CNC applications and other applications that require highly precise motion control. TinyG is meant to be a complete embedded solution for small/medium motor control. Here are some of the main features of the v8 hardware.

Integrated motion control system with embedded microcontroller (Atmel ATxmega192)

4 stepper motor drivers (TI DRV8818) integrated on a ~4 inch square board

Stepper drivers handle 2.5 amps per winding which will handle most motors up thru NEMA23 and some NEMA34 motors

Accepts Gcode from USB port and interprets it locally on the board

6-axis control (XYZ + ABC rotary axes) maps to any 4 motors

Constant jerk acceleration planning (3rd order S curves) for smooth and fast motion transitions

Very smooth step pulse generation using phase-optimized fractional-step DDA running at 50 Khz with very low jitter

Networkable via SPI to support off-board devices and for networking multiple boards into multi-axis systems

Microstepping up to 1/8 (optimized DDA makes this smoother than many 1/16 implementations)

Second Feature.

Andrew Boggeri of Full Spectrum Laser will be demonstrating the SLA resin 3D printer that is currently tearing up the Kickstarter goal (

Stop by and check out the machine and see some of the prints. Resin printers are a little messy to move around so we probably won't see it print, but plenty of samples will be shown. He will be able to demo the drawing speed, software and cloud interface.