Roly LaserMATIC Mk2 Rotary Steps-Per-Rotation & Calibration Tool
Eliminate oblong circles and vertical stretching on the Roly LaserMATIC Mk2. Use our interactive calculator below to correct your LightBurn steps-per-rotation or GRBL $101 commands, then download a millimeter-accurate calibration ruler SVG.
Rotary Steps-Per-Rotation (SPR) & GRBL $101 Calibrator
Preset: Roly LaserMATIC Mk2 (20W / 30W Diode)
Measure along the Y-axis (rotary circumference direction).
Enter this in LightBurn > Tools > Rotary Setup > Steps per rotation.
Safe continuous rotary perimeter without slipping: 224.7mm.
$101=100.000Always send this command in LightBurn Console after disconnecting the rotary attachment to restore flat Y-axis belt scaling.
Monetization Slot: Native Under-Download Banner
High-CTR placement positioned directly below the SVG export and rotary calculations. Configure your Adsterra native key in src/config/adsterra.ts.
Roly LaserMATIC Mk2 Factory Rotary & Optical Specifications
Pre-Rendered Specs| Laser Machine Model | Roly LaserMATIC Mk2 |
|---|---|
| Laser Source & Optical Power | 20W / 30W Diode (Enclosed Autofocus Diode) |
| Supported Control Software | LightBurn |
| Default Rotary Mechanism | Chuck Rotary |
| Default Steps / Pulses Per Rev | 6400 pulses/rotation |
| Standard Drive Roller Diameter | 16 mm |
| Optical Beam Spot Size | 0.08 mm |
| Flatbed Restore Command | $101=100.000 |
| Focal Distance & Optics | 45mm • Use mechanical Z-touch probe mounted next to laser cone. |
Step-by-Step Rotary Setup & Test Burn Checklist for Roly LaserMATIC Mk2
- Lower motorized bed and place Roly chuck rotary fixture.
- Plug 4-pin motor connector into dedicated Rotary port on side chassis.
- In LightBurn, set Chuck Rotary with 6400 pulses/rev and 2.0 gear ratio.
- Probe workpiece center to establish precise focal plane.
- Burn calibration ruler to guarantee zero graphic distortion.
Worked Calibration Example for Roly LaserMATIC Mk2
Suppose you place a standard 20oz Skinny Straight Tumbler (Diameter: 73mm, Circumference: 229.34mm) onto the Roly LaserMATIC Mk2.
You enter a commanded test square Y-height of 20mm into LightBurn with the baseline of 6400 steps/rev.
If using GRBL steps/mm, the corrected formula produces:
Popular Tumbler Pairings for Roly LaserMATIC Mk2
Roly LaserMATIC Mk2 Rotary Calibration FAQs
Q1: How do I configure the rotary attachment on the Roly LaserMATIC Mk2 in LightBurn?
To set up the Roly LaserMATIC Mk2 in LightBurn: 1) Go to Tools > Rotary Setup. 2) Select your rotary type (Chuck). 3) Enter the factory baseline: 6400 steps/rotation (or check Y-axis $101 steps/mm). 4) Enter your roller diameter (16mm) or tumbler caliper diameter. 5) Enable the 'Rotary Enabled' toggle and test frame your object.
Q2: What is the factory default rotary steps/mm or pulses/rev for the Roly LaserMATIC Mk2?
The Roly LaserMATIC Mk2 uses a baseline of 6400 steps per revolution for chuck rotary mode, and 100 steps/mm for flatbed Y-axis movement. Drive roller diameter on factory rollers is 16mm.
Q3: How do I reset the Roly LaserMATIC Mk2 back to flat-bed laser cutting after rotary engraving?
When disconnecting the rotary attachment, disable 'Rotary Enabled' in LightBurn. For GRBL-based controllers, send the command: $101=100.000 in the Console window to restore true 1:1 flatbed Y-axis gantry movement.
Q4: What is the best way to focus the Roly LaserMATIC Mk2 on a cylindrical tumbler?
Use mechanical Z-touch probe mounted next to laser cone. The focal length is 45mm with an optical spot size of 0.08mm. Always focus at the apex (highest vertical point) of the cup to ensure maximum beam energy density.