Zenworks CNC (re)Build

My buddy just moved into a new apartment and was forced to downsize his workspaces. As a result, he sold me his partially assembled Zenworks CNC for CHEAP. I immediately set out to get it up and running.

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I’ve dumped content here for later update but still need to circle back and fill out the story behind it. After you’ve tried to make sense of the fragments below, visit “Hi, I’m Nate” above for more info about this site —NHB

How I Got This Machine

A buddy of mine just moved into a smaller apartment downtown, and was forced to downsize his workspaces. As a result, he sold me his partially assembled Zenworks CNC for cheeeeap, and I immediately set out to get it up and running.

For $260, I Got…

Preparing For Refurb

When I got the machine, it was a spider web of cables and crimps. Step 1 for me was to strip all of the pieces off to begin cleaning it up.

Running New Wires

Building a Base Cabinet

The Power Supply

Designing an Acrylic Carrier

Laser Cutting the Acrylic Carrier


Installing & Wiring Components


Cost Breakdown – Power Supply


ITEM COST NOTE
48VDC 7.5A Power Supply $35 Provides primary power to spindle + feeds the Arduino DC Buck Converter.
12VDC x 8A Power Supply $14 Provides primary power to DC stepper controllers,
DC to DC Buck Converter $10 Steps the 48VDC spindle power down to 5VDC for the Arduino.
4-Pin “Aviation” Connector $3 4-Pin Connector: Ground + 48VDC + 12VDC + 5VDC
M5x15mm Brass Standoffs $4 M5x15mm Brass Standoffs
M3x5mm Brass Ferrules $3 M3x5mm Brass Ferrules
M3 x 10mm Alloy Steel Hex Bolt $3 M3 x 10mm Alloy Steel Hex Bolts
$72

Arduino & Motor Controllers

Pinout & Wiring

Helfpul Pinouts at Grbl Github.

Designing & Laser Cutting Carrier

Cost Breakdown – Arduino & Controllers

Final Assembly

Limit Switches

http://wiki.zentoolworks.com/index.php/Arduino_Limit_Switch_Installation_Instructions
Helpful Limit Switch Docs on the Shapeoko Forums.
https://github.com/gnea/grbl/wiki/Wiring-Limit-Switches
https://github.com/gnea/grbl/issues/96
https://forum.arduino.cc/index.php?topic=279682.0
About Arduino Inputs
Zenworks suggests NC wiring.

Stepper Motors

Thanks, Inventables
Thanks, Inventables

200 Steps/Rev. (1.8deg/step)
But what about polarity?

Spindle

The spindle arrived largely intact. There’s a very small amount of runout, but I’ll wait to pass judgement until a few projects have come & gone.

Firmware & Calibration

Flashing The Arduino

GBRL, available via Github.

Setting GRBL Parameters

Reference: GRBL Settings
Reference: Grbl’s Settings and What They Mean
http://www.cnczone.com/forums/pcb-milling/267216-cnc-forum.html

Calibrating The CNC

How to Set Your GRBL Feed Rate

GRBL Settings 101: A How to Guide


http://www.aquickcnc.com/wiki/Stepper_Motor_Calculations
http://wiki.zentoolworks.com/index.php/Arduino_Stepper_Motor_Control
http://forums.zentoolworks.com/viewtopic.php?f=11&t=16893
https://forum.arduino.cc/index.php?topic=279682.0

First Cut

Generating The G-Code

Sending G-Code > Arduino

Leftovers & Total Costs



SYSTEM COST
Initial Purchase $260
Power Supplies $62
Control Systems $###
eBay Sales -$230

Full Disclosure This page contains links to products I’ve purchased at full price & use myself. When you buy something from a link on this page, I earn a few pennies to help pay for my cheap-and-completely-okay web hosting.


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