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STEPCRAFT D.600 Install Instructions

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Stepcraft Laser Install instructions
June 11, 2018
11:27 AM
Stepcraft CNC
Stepcraft allows you to change out tools in a fairly straightforward manner.
Electrical
You have two options for adding a laser to a StepCraft CNC:
1.
ON / OFF control which is easier but has some quality issues– This will be using the spindle relay to turn on and off the laser.
2.
PWM control – This will use a different pin to produce a PWM signal for power control.

Option #1: ON / OFF Control:

There is a DB 15 connector on the CNC. On this connector is a relay that you can control via software. The 15 pin connector is the one on the right.
From the instruction manual:
To connect the laser you will need to use the following on the DB15 connector:
•
PIN 13 = LASER + on Driver Board
•
PIN 2 = LASER – on Driver Board
Make sure the positive and negative is correct!
You can make your own D Sub cable if you know how to solder. You can pick them up at your local electronics shop. Or you can buy a breakout board
from various locations online. Here is an example of a soldered cable.
Quick Notes Page 1

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Summary of Contents for STEPCRAFT D.600

  • Page 1 June 11, 2018 11:27 AM Stepcraft CNC Stepcraft allows you to change out tools in a fairly straightforward manner. Electrical You have two options for adding a laser to a StepCraft CNC: ON / OFF control which is easier but has some quality issues– This will be using the spindle relay to turn on and off the laser.
  • Page 2 Option #2: PWM Power Control Setup If you want to have power control, then instead of using pin 13 in the previous section for the laser “+” signal, use pin “7” instead. Remember to use the same pin in the OUTPUT setup as well. To connect the laser you will need to use the following on the DB15 connector: •...
  • Page 3 If you want to use PWM control, do the following: Using Spindle PWM to Control Laser This is from http://buildlog.net/cnc_laser/mach_laser_power.html The theory is that you want a specific frequency to run the laser at and then you can adjust the duty cycle to increase or decrease the power of the laser.
  • Page 4 In the “Config” —> “Spindle Pullies” selection, enter “0” for Min Speed and “100” for Max Speed and a Ratio of “1”. This will then equate the spindle speed setting for laser power with a one to one ratio. Full power is 100 and off is 0 (or better to use M5). To control this new PWM output in G Code, simply add an “SXXX”...
  • Page 5 • Set M3 relay pin to “1” and port to “1”. This will map to the stepcraft Pin 13 that you have connected to the laser driver. You can now turn on and off your laser with the “M3” command. Test it on the run screen by pushing the clockwise spindle button.

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