@elliscrane My guess would be they set the microstepping for the drivers, usually 1/4, 1/8, 1/16 etc.
Most stepper motors have 1.8 degree steps, or 200 per revolution. Microstepping is a way to decreases the step distance and increases resolution, it is common to use 1/16th so you get 3200 steps per revolution. This also makes the motors run smoother but at the cost of maximum speed and torque.
@kdaffy If you want vector you need to save as a vector format, so DXF would be the best choice. PNG is a raster image so it's going to load as a raster. Inkscape is a drawing program and typically used for vector, something like Photoshop is an image editor and designed for raster. Create the job in the right program and then load into T2Laser for G-code generation and ouput to the laser.
@elliscrane It sounds like you have 2 separate issues, let's talk about the 2nd one first. You load an image in T2Laser, it shows on the screen correctly but when you click to generate the G-code nothing is created? That sounds like you've got a bad setting somewhere, in the Help menu click Restore Defaults, then close T2Laser and restart. Did that fix it?
@JeneStar T2Laser has always used 0-255 for laser power, you were probably using some other firmware previously. You can change the laser max Grbl parameter ($30) to 1000 if you prefer 0-1000 for power.
The Nano PWM output (TTL signal to the laser) is 8-bit, so it can only do 0-255. Firmware that is set to 0-1000 requires Grbl to down scale the input values to determine the output, so 500 would be (500/1000) * 255 = 128 (rounded). The problem with this approach is the rounding and down scaling can cause banding effects in the grey scale rather than the smooth transitions T2Laser achieves. This is worse with CO2 lasers and CNC machines where it affects the cut depth.
@sseaman It depends on the image, the benefit of raster scanning is you get a superior image and less direction changes which require deceleration and acceleration - so actually it's not always slower. You can enable rapid skip blank which will bypass blank areas or you can use other methods to run the job as a vector with pseudo fill (hatching).
@SimoneB The 555 motors are >3A so it's possible at start-up or if it stalled that it exceeded the max current of the MOSFET and caused it to fail. You can use a 5V controlled relay to switch the motor (some boards have these) and then the motor is not a problem. A Dremel would be good.
@firewirehn Normal TTL convention is high is ON and low is OFF, the laser you showed is opposite which is really dumb. So it would need a TTL logic inverter on the input, you should also include a pull down resistor for safety. If you don't have electronics experience I would just purchase a better laser like the Eleks brand that is plug and play with their board.
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