xTool S1 Rotary Steps-Per-Rotation & Calibration Tool
Eliminate oblong circles and vertical stretching on the xTool S1. 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: xTool S1 (20W / 40W 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.
xTool S1 Factory Rotary & Optical Specifications
Pre-Rendered Specs| Laser Machine Model | xTool S1 |
|---|---|
| Laser Source & Optical Power | 20W / 40W Diode (Enclosed Diode Laser) |
| Supported Control Software | xTool Creative Space (XCS) / LightBurn |
| Default Rotary Mechanism | Chuck Rotary |
| Default Steps / Pulses Per Rev | 12800 pulses/rotation |
| Standard Drive Roller Diameter | 16 mm |
| Optical Beam Spot Size | 0.08 mm |
| Flatbed Restore Command | $101=100.000 |
| Focal Distance & Optics | 50mm • Use S1 pinpoint dual-point positioning system to capture tumbler top and bottom z-heights. |
Step-by-Step Rotary Setup & Test Burn Checklist for xTool S1
- Remove baseplate and install S1 riser base with RA2 Pro inside.
- Connect the motor signal cable to the S1 internal expansion socket.
- Use 'Twin-Point Positioning' in XCS to map cylindrical blank boundaries.
- In LightBurn, specify Y-axis rotary with 12800 steps per revolution.
- Burn calibration ruler on scrap cup to confirm 0.1mm accuracy.
Worked Calibration Example for xTool S1
Suppose you place a standard 20oz Skinny Straight Tumbler (Diameter: 73mm, Circumference: 229.34mm) onto the xTool S1.
You enter a commanded test square Y-height of 20mm into LightBurn with the baseline of 12800 steps/rev.
If using GRBL steps/mm, the corrected formula produces:
Popular Tumbler Pairings for xTool S1
xTool S1 Rotary Calibration FAQs
Q1: How do I configure the rotary attachment on the xTool S1 in LightBurn?
To set up the xTool S1 in LightBurn: 1) Go to Tools > Rotary Setup. 2) Select your rotary type (Chuck). 3) Enter the factory baseline: 12800 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 xTool S1?
The xTool S1 uses a baseline of 12800 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 xTool S1 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 xTool S1 on a cylindrical tumbler?
Use S1 pinpoint dual-point positioning system to capture tumbler top and bottom z-heights. The focal length is 50mm 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.