On 24/10/2016 22:25, [email protected] wrote: > So there is another mode I didn't mention. When accelerating or > decelerating, you're not at the specified cut speed, and the laser power must > be reduced proportional to the speed. >
A better way to solve this problem when raster engraving is to have 'run up' and 'run down' areas outside the raster image area so the cutter is up to speed before it starts cutting. However for vector engraving varying the power proportional to speed is useful. Is there any reason why the realtime part of the raster component can't run in a faster thread, say 10kHz? As long as you have hardware PWM (e.g Mesa FPGA) you should be able to get pretty good resolution. For fine detail engraving using sub dot-size resolution makes a noticeable difference so I think for best results you are going to need more than 4kHz. Just to complicate the timing issues many lasers work better with 'tickle' pulses when they are off. Basically you use short PWM pulses at a lower frequency just to keep the gas ionized but not with enough power to lase. This speeds up turn-on. Les ------------------------------------------------------------------------------ The Command Line: Reinvented for Modern Developers Did the resurgence of CLI tooling catch you by surprise? Reconnect with the command line and become more productive. Learn the new .NET and ASP.NET CLI. Get your free copy! http://sdm.link/telerik _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
