Laser Engraving
16 Nov 2015 16:04 #65331
by cncbasher
Replied by cncbasher on topic Laser Engraving
i dont see a problem ,
i'll look at the setup you have later today once i arrive home . so don't Panic !
i'll look at the setup you have later today once i arrive home . so don't Panic !
Please Log in or Create an account to join the conversation.
16 Nov 2015 18:10 #65335
by Micromet
Replied by Micromet on topic Laser Engraving
Hi Andy,
Yes - I had thought about using Z-axis positioning to moderate the laser output - but I came to the conclusion that (a) the change in intensity would be very small over the Z-height range of 100mm; (b) you couldn't move the Z-axis fast enough when going from dark highly burnt areas to light unburnt areas (e.g. inside/outside strong shadows); and (c) it would change the focus of the laser leading to blurring of the burned image - analogous to increasing the pixel size within the image from small concentrated pixel burns to large lightly burned pixels - although that might be an artistic option that could work.
Yes - I had thought about using Z-axis positioning to moderate the laser output - but I came to the conclusion that (a) the change in intensity would be very small over the Z-height range of 100mm; (b) you couldn't move the Z-axis fast enough when going from dark highly burnt areas to light unburnt areas (e.g. inside/outside strong shadows); and (c) it would change the focus of the laser leading to blurring of the burned image - analogous to increasing the pixel size within the image from small concentrated pixel burns to large lightly burned pixels - although that might be an artistic option that could work.
Please Log in or Create an account to join the conversation.
16 Nov 2015 18:37 #65337
by andypugh
Some confusion here...
Image-to-Gcode outputs G-code where Z height is proportional to black-level. So I don't mean actual physical Z-height but the Z-value output by the G-code, which probably would not be connected to a physical axis at all.
Replied by andypugh on topic Laser Engraving
HYes - I had thought about using Z-axis positioning to moderate the laser output - but I came to the conclusion that (a) the change in intensity would be very small over the Z-height range of 100mm;
Some confusion here...
Image-to-Gcode outputs G-code where Z height is proportional to black-level. So I don't mean actual physical Z-height but the Z-value output by the G-code, which probably would not be connected to a physical axis at all.
Please Log in or Create an account to join the conversation.
16 Nov 2015 18:42 #65341
by cncbasher
Replied by cncbasher on topic Laser Engraving
changing z pos does not work , as essentialy you will move out of the focus point of the laser
you need to control the diode for the best performance
you need to control the diode for the best performance
Please Log in or Create an account to join the conversation.
Moderators: cncbasher
Time to create page: 0.127 seconds