PiBurn currently comes in two sizes lengthwise. Standard is 566 mm (22.3 in) including motor, Mini is 397 (15.7 in) including motor. Mini will fit to the bed size of Boss Laser LS-1416 and LS-1420.
Great thing about PiBurn is that it can be easily cut to required size because it’s base is made out of aluminum extrusion beam that can be easily cut with any saw.
If you ordering for Boss Laser, following lengths will be selected for you:
For LS1416 and LS1420 Mini
For LS1620 and above Standard
In most cases you need to worry about height clearance from bottom of PiBurn rail to top of the cup you are going to engrave. And then add focal distance from your laser nozzle to top of the cup. For example if you are engraving 20 oz Polar Camel tumbler you will need about 5.72″ inches from bottom of your laser to top of the cup plus another 8mm (in this case it’s distance from Aeon Mira nozzle to object for 2″ lens) so you will need to have at least 6.1 inches clearance. Many laser machines allow you to remove honeycomb table as well as blades/slats so you can place PiBurn on the laser floor/tray. This will give you maximum clearance.
Standard feet will provide maximum headroom, however if you opted for magnetic feet, that will add about 20.5 mm of height to the PiBurn. However magnetic feet can be completely folded up allowing you to have same clearance as standard feet!
When ordering PiBurn you will be asked to choose correct plug wiring. All plugs provided with PiBurn are “aviator type” like seen on the image below.
Socket (on the left) is already installed on your laser machine. Plug (on the right) is what comes with PiBurn.
Because it’s impossible for us to wire our rotary attachment for any possible Laser machine manufacturer, we might need your help to provide us correct wiring option.
Here’s explanation of the currently offered plug configurations:
Boss (and Koenig):
A 4 PIN aviation style plug will work with all Boss CO2 Laser machines. So if you have one of these laser cutters, you are all set!
For Aeon lasers such as Mira or Nova we will wire 6 PIN Aviation Style Plug for you. No worries!
This type of plug was tested with no-name 50W Blue and White Chinese laser from eBay. There’s no 100% guarantee that your machine will be wired the same, but it’s a pretty good bet.
We will wire plug for you if you can provide a wiring schematic or send a note with your order about how your socket is wired (each connector is labeled 1 thru 4). If you do not have documentation with wiring diagram, it’s pretty easy to find out how your Y axis plug is wired into stepper driver (i.e. which wire goes to what terminal). For 3-phase driver you’ll need to find out which wire goes to “V”, “U” and “W” marked terminals on Stepper Driver. For 2-phase, trace it to “A+”, “A-“, “B+”, “B-” terminals.
You can also request a wire without plug attached.
If you wish to solder wires yourself, choose this option. Will will include a 4 pin plug but it will not be soldered to the motor wires. You will need to know how to solder and have soldering iron for this option, however soldering these plugs is very easy even for a beginner.
Here’s Wire Color designation:
What kind of motor do I need?
PiBurn uses Stepper Motors in Nema 23 sizes. These come in 2 phase and 3 phase types. Please don’t confuse these with electrical phases in your home, it has nothing to do with your home power or voltages.
It’s very important to know type your laser machine can use. This should be same type of stepper motor as one that drives your Y gantry.
If you own a Boss Laser machine, look at your machine model. All laser models LS-16xx and above use 3-phase motor. Anything below that (like LS-1420) is 2-phase.
For Aeon Nova Lasers always choose 2-phase motor!
Best part is that we KNOW what kind of motor is needed for many machine models. During ordering you will be asked to put your Laser Machine make and model. Even if you choose wrong type of motor we’ll know which one you need and will ship you correct type!
Existing Motor Size
Now if you have different laser, easiest way to tell if by looking at your Y axis motor.
All motors sizes less than Nema 23 are 2 phase. Nema 23 motor’s front is 2.3″x2.3″ (or 57mm x 57mm). So if yours is smaller you have 2-phase motor. Otherwise continue identification process…
Check for any labels on the motor that might tell it’s model number. Then search online to see if you can find out motor specs and how many phases it is. No luck? Let’s take a look at
Number of wires on connector
Trace cable that’s coming of your Y axis motor to the plug. Check plug or socket (you might have to look from inside of the machine) to see how many wires it has. 3-phase stepper motor usually have 3 wires, sometimes 6. 2-phase will have 4 wires. Still can’t tell?
Check Stepper Driver
Each stepper motor in your laser is connected to it’s own stepper driver. It should look something like on the picture above.
There are 2 ways to tell if it’s 2-phase driver or 3-phase. If you can clearly see model number, search online and read it’s description.
Alternatively take a look at “High Voltage” terminal block. If it has marking “U V W”, it’s a 3 phase driver and you’ll need 3-phase motor.
If it has markings like “A+ A- B+ B-“, it’s a 2-phase driver and you’ll need 2 phase motor!
Do Circle Pulse or Steps per rotation affect engraving speed?
We’ve been asked why our rotary requires different Circle Pulse (a.k.a. steps pre rotation) than other Rotaries and would if affect engraving speeds. Short answer is, every rotary is different, specifically circle pulse value depends on gear ratio used in Rotary. Ours require specific values due to the gear sizes we use. It could be different from another rotary you’ve used previously, but you do have to change settings to match what is suggested in the PiBurn User Manual.
Answer to the second part of the question is a no, speed of the engraving is not affected by rotary settings at all. It’s only affected by the image size, engraving speed and scan line interval.