xTool P3 Rotary Steps-Per-Rotation & Calibration Tool
Eliminate oblong circles and vertical stretching on the xTool P3. 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 P3 (55W CO2)
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 P3 Factory Rotary & Optical Specifications
Pre-Rendered Specs| Laser Machine Model | xTool P3 |
|---|---|
| Laser Source & Optical Power | 55W CO2 (CO2 Glass Tube) |
| 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 | 0.15 mm |
| Flatbed Restore Command | $101=100.000 |
| Focal Distance & Optics | 50.8mm • Position dual 16MP cameras for curved surface scanning before rotary rotation. |
Step-by-Step Rotary Setup & Test Burn Checklist for xTool P3
- Connect RA2 Pro rotary module using the high-speed extension bus.
- Select 'Use Rotary Attachment' in XCS or enable Rotary in LightBurn (Y-axis).
- Verify perimeter clearance against the gantry cover before zeroing origin.
- Input measured caliper diameter into the software cylinder diameter input.
- Engrave the test ruler and measure Y-length with digital calipers.
Worked Calibration Example for xTool P3
Suppose you place a standard 20oz Skinny Straight Tumbler (Diameter: 73mm, Circumference: 229.34mm) onto the xTool P3.
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 P3
xTool P3 Rotary Calibration FAQs
Q1: How do I configure the rotary attachment on the xTool P3 in LightBurn?
To set up the xTool P3 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 P3?
The xTool P3 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 P3 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 P3 on a cylindrical tumbler?
Position dual 16MP cameras for curved surface scanning before rotary rotation. The focal length is 50.8mm with an optical spot size of 0.15mm. Always focus at the apex (highest vertical point) of the cup to ensure maximum beam energy density.