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General Mach Discussion / Height Control for Router Table
« on: August 13, 2011, 09:14:12 AM »
I want to use an ultrasonic sensor for height control as my sheets are not always perfectly flat. Blowing compressed air will clear the chip so I get accurate readings from the sensor. The ultrasonic sensor is ideal for this application as it can be used on transparent material and doesn't contact/damage the material.
The sensor output is 0-10V. I can use an op-amp and adjust the gain to condition the signal for THC or similar device. Or I could use it to compare to a set-point to generate THC UP or THC DOWN, but that doesn't solve the problem of no PID loop. I need PID to smooth out the signal so it's not constantly moving up and down. Any recommendations that don't involve electronic design, or at least very simple with minimal development time?
Has anyone developed a PID that works well for this application? If not, can anyone recommend a THC for this application?
Any thoughts?
Someone must have done something like this already!
Thanks,
Chris
The sensor output is 0-10V. I can use an op-amp and adjust the gain to condition the signal for THC or similar device. Or I could use it to compare to a set-point to generate THC UP or THC DOWN, but that doesn't solve the problem of no PID loop. I need PID to smooth out the signal so it's not constantly moving up and down. Any recommendations that don't involve electronic design, or at least very simple with minimal development time?
Has anyone developed a PID that works well for this application? If not, can anyone recommend a THC for this application?
Any thoughts?
Someone must have done something like this already!
Thanks,
Chris