The Art of Laser Rotary Engraving: Tips and Tricks for Beginners

Image credit: 307 Cups

Tumblers are HOT right now! This is why you should look into getting a laser rotary for your laser engraver, if you haven't already. Laser rotary engraving opens up a world of possibilities for customizing cylindrical objects like tumblers, bottles, and glassware. We have a great blog series on how makers just like you carve out a niche while making a living selling tumblers on Etsy and beyond. With the right tools and a bit of practice, you can achieve exceptional results and sell professional-looking drinkware into all sorts of new markets.

This guide will walk you through the basics of laser rotary engraving, provide tips and tricks, and include a step-by-step tutorial using LightBurn to engrave a tumbler.

Getting Started with Laser Rotary Engraving

Tools You Need

1. Laser Engraving Machine: Ensure your machine is compatible with rotary attachments -- ask the sales rep or support if in doubt. Our partners all make machines compatible with the PiBurn: OneLaser, Boss, Aeon, OMTech, Thunder Laser Canada, Laguna Tools.
   PRO TIP: Get a CO2 machine to engrave the vast majority of tumblers -- it works by lasering the powder coating right off and is by far the most versatile option. Get a Fiber machine for stainless steel tumblers, and a UV marking machine for glass.
2. Laser Rotary Attachment: The PiBurn Grip or PiBurn V Roller are excellent choices for holding cylindrical objects securely. Find out which one is right for you.
3. Software: LightBurn is highly recommended for its user-friendly interface and powerful features. It is compatible with all the machines listed above. Beware of machines that are not compatible with LightBurn -- usually not a great sign.

Step-by-Step Setup Guide

1. Initial Assembly and Unboxing

Your PiBurn comes with a "Thank you" card with a link to the manual. Read it -- the manual is your friend!

• PiBurn Grip: Unbox and mount the Grip head on the bracket per the included instructions. This takes less than one minute. Make sure not to lose any of the jaws and tools included in the box.
• PiBurn V: No assembly required. If your machine has a dedicated rotary port, plug it in. If not, disconnect the Y-axis motor and connect the rotary attachment in its place.

2. Things to Keep in Mind for Setup

• Object Diameter: For the Grip, measure the diameter of your engraving object (e.g., tumbler). For the PiBurn V, use 62mm for the diameter of the wheels. Remember -- for chuck rotaries like the Grip, the object diameter must be entered each time.
• Steps Per Rotation: Determine the steps per rotation for your specific machine. Common values are listed in the PiBurn manual. For unlisted machines, check the stepper driver settings.

3. Configuring LightBurn

• Open LightBurn and start a new project. Go to Rotary Setup (Ctrl+Shift+R).
• Set Rotary Type to "Chuck" for the Grip or "Roller" for the PiBurn V.
• Enable the rotary attachment. You will come back to these settings after dialing in the rotary and measuring your object diameter.

Engraving a Tumbler: Quick Tutorial

1. Prepare Your Tumbler

• Measure and note the diameter of the tumbler if you are using the Grip.
• Clean the tumbler surface before engraving. Make sure your tumbler has a powder coat -- stainless steel tumblers should not be engraved on a CO2 laser; use a Fiber laser instead.

2. Set Up Your PiBurn

• Place the PiBurn on the laser bed. If using magnetic feet, ensure they are secure.
• Grip: Insert the tumbler into the grip jaws. Make sure it's snug and not slipping -- use the included lever tools for leverage. Adjust height and tilt for even alignment.
• PiBurn V: Secure the tumbler with the clamp, ensuring it is centered and level. Use the back stopper to prevent walking during the engrave.
• Make sure your rotary is aligned to the gantry of the laser, otherwise your images will look skewed.
• You can also purchase an alignment tumbler to make your life easier.

3. Finish Configuring Your LightBurn File

• In rotary settings, insert the diameter of your object.
• Draw a 100mm line (or 4 inches) in LightBurn for the 100mm test.
• Set power to a low setting (1-10%) and speed to 20mm/s to avoid burning the test line.
• Position the laser head over the starting point on the tumbler.

4. Perform the 100mm Test (Watch Video)

• Use LightBurn's Frame function to check alignment. The laser should trace the 100mm line without firing.
• Adjust the object diameter or steps per rotation if the laser doesn't match the line length.

Tips and Tricks for Beginners

1. Safety First: Always wear protective eyewear and never leave the laser unattended while operating.
2. Rotate Slow: Ensure the rotary moves slowly when framing, especially with the PiBurn V, to prevent the object from slipping or flying off.
3. Center Alignment: Align your rotary to the laser gantry. Use the markings on the PiBurn or get a PiCAT calibration tumbler. Use the included bubble level to ensure your object is perfectly horizontal -- misalignment leads to distorted engravings.
4. Adjust Idle Speed: Lower the idle and acceleration speed in LightBurn to prevent sudden movements that can dislodge the object.
5. Use Test Runs: Always test on similar, less valuable objects before engraving the final piece.
   PRO TIP: Use painter's tape and fire a test run at 10% power over the tape!
6. Regular Maintenance: Keep your PiBurn clean, especially the O-rings, to maintain good traction. The Grip may need lubrication around the shaft after heavy use. The PiBurn V may need wheel alignment and belt tightening. See this PiBurn maintenance video. (Not needed on PiBurn 5!)
7. Image coming out stretched? Read this to solve the issue.

Mastering laser rotary engraving requires patience and practice. By following this guide and using the PiBurn with LightBurn, you'll be well on your way to creating stunning customized drinkware and selling them on Etsy or in your local markets. Every step -- from precise measurements to careful alignment -- contributes to your success. If you get stuck, lean on our community for help right away.

Stick with it and happy engraving!