Section 12: Speed and Power
Recommendations
168
a good mark than the raw speed of the system or the amount of laser power that is
output by the laser.
The interaction of the laser with different materials is a complex process, and this is
especially true for some materials that are actually two different materials that have
been bonded together. Since the laser interacts differently with each layer of material
(and sometimes even the bonding agent), you may be better off slowing the machine
down to give the laser time to properly interact with the different layers in the
material.
If you have a multi-layered material that you can mark easily, but not well, at high
speeds, try lowering the speed to see if that produces a better mark. If you’re able to
produce a better mark, but it’s overpowered, lower the power also.
Multiple Passes
Some materials look better if you make more than one pass. For example, with
plastics, some colors – like blue – are very aggressive and tend to leave a shadow on
some substrates. It is often easier to make one pass at the recommended speed and
power setting, and then make another pass at the same speed, but with a greatly
reduced power setting to achieve the desired results. If the material is not moved
between passes the alignment of the second pass should be identical to the first pass.
Vector cutting may also require multiple passes. If you find that you cannot cut
completely through a material or if you are melting a material in a single pass, try
making two or even three passes instead of just one. Some materials are not laser
compatible, but can be cut anyway if a gentle touch is used. Some users like to
refocus between passes, but this is a matter of personal preference. Multiple passes
may also allow you to cut through thicker materials than the laser is rated for.
See how to automatically engrave or cut multiple passes at the end of the Using the
Epilog Dashboard section of this manual.
To Next Page
Loading...
Need help?
General