The purpose of the optocouplers in other places is to allow signals to change voltage domains or protect on system from voltage spikes or surges in another. The coils in the stepper motors are isolated (at least they should be) from everything else, so there's no benefit from isolating them, they already are. When I try to engrave achsentest_v2.svg, it keeps engraving in a straight line.Ĭould it be engraving only works with bitmaps, not vector graphics? This happens with both shapes and text-fonts (see pictures attached). The laser test-fires once (see the dot (at the green arrow)) and then maps the rest of the shape to the right. When using the engraving setting, the story is different, however.Īfter about 0.5cm of correct engraving, the X-axis suddenly shifts right, about 50% of the width of the shape. (I've seen values of 470 Ohm to 1 kOhm reported, can anyone confirm accuracy?) The burned line is a little thick, but that could be because I need to up the resistance on the 5V line from the laser PWM.
When cutting this 1% power, 50% speed), I get a nice shape with accurate size. Orientation is correct when I cut achsentest_v2.svg My home position is in the top left hand corner (x=0, y=225000). I've used the latest LAOS firmware (18-03-2015) and the stable 1.7 version of VisiCut with Inkscape 0.48. Will post photo's of connections and wires here later. The wobble speed is represented in Hz.Thanks to forum and wiki, I have changed my Moshi HPC-3020 (German edition) 40W laser into a liberated LAOS laser. The Wobble speed affects the density of the spiral curves when a Wobble radius is programmed. Altering the Wobble Speed setting will increase or decrease the frequency of the spiral curve repetition rate.
Therefore, the Wobble Radius setting converts the normally straight vector line (Wobble Radius set to 0.00mm) to a series of dense spiral curves, thus providing greater line thickness. However, for some applications this thickness may not be sufficient. The line thickness (with no Fill) is equal to the dimension of the laser spot. The Wobble Radius property allows marking of single lines, either True Type / single line characters or imported files, with thicker lines. The more passes made the ‘deeper’ and slower the mark. The Passes property represents the number of times the laser passes over the object.
Various fill effects can be achieved when used in conjunction with Fill Spacing. The Fill Angle property specifies in degrees, the angle of laser beam movement when filling characters. The Fill Spacing (Fill Density) is measured in mm and can be reduced to a spacing of 0.01mm. A large fill spacing will cause gaps between the lines used to fill the characters. The smaller this value, the denser the fill, at the cost of a longer marking cycle. The Fill Spacing property specifies the distance between fill lines. Test matrix showing effects of speed vs frequency on a laser mark Fill Spacing The Q-switch may be compared to a sluice shutter, which closes and deflects the laser beam. Frequency is inversely proportional to laser beam power, i.e., if the frequency is too high, the power may not be efficient for the marking process. A lower frequency will generate ‘spotted’ engraving while a higher frequency will allow ‘line’ engraving. The Q-switch is an electro-optical system, which controls the opacity of a lens making it possible to change the laser beam frequency. This parameter is used to adjust the laser output frequency by directly operating the Q-switch. Altering this frequency creates different marking effects. The Frequency (Hz) property represents the Q-Switch frequency of the laser pulses during marking.
Using a slow speed will create a deep well defined mark, if the speed is too high then the laser beam will have no effect on the material being marked Frequency The Speed property represents the vector speed in millimetres per second that the laser beam travels when marking the object.
If the mark is too aggressive at full power try increasing the speed before reducing the power to see if cycle time improvements can be gained. Often it is a trade-off between speed and power. This specifies the power level of the laser as a percentage.
The software will process the Marking Sequence in order and therefore set the mark settings, then mark objects below at those settings until a different mark setting tool is encountered Power Simply drag the Mark Setting object above the markable objects which require those mark settings.
Several Mark Setting Objects may be used in a marking sequence especially if marking Single Line and True Type fonts with Shape or Vector Drawing objects in the same layout each type of marking object generally needs different laser settings to get the best performance. The Mark Settings Object is used to change the laser settings within the marking sequence.