Jeshua, >> It states that those power supplies can be controlled from a TTL PWM, so I assume that it will be easy to control from a standard parallel port with HAL and LinuxCNC. Is that correct? <<
Most lasers using PWM control require a frequency between 5Khz and 25Khz, then how long the signal is high (duty cycle) is a fraction of that frequency. So that may be a bit much for a standard parallel port. An inexpensive FPGA board like the Mesa 7i43 may make your life a whole lot easier. >> Has anyone set up a servo or stepper drive to adjust the laser's focal point? Seems easy enough, guess I am just wondering how to tie it into g-code. << Using a Z axis to adjust the height should be a simple matter, controllable either as a direct motion command or tool offset. I suspect, however, that in the case of aluminum sintering you will have a very small usable depth of field since the energy imparted per unit area is going to decrease at the square of the increase in diameter of the spot size. Regards, Eric ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
