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LDmicro Forum - How to detect the milled side of a crucible. |
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How to detect the milled side of a crucible. (by Wonder S)
Hi friends and fans of LDMicro. Any ideas, please, as to how one can DETECT the milled side of crucibles similar to the one attached? I want to use an MCU running LDMicro. The crucible will be redhot, and after being placed on a stepper rotated platform, it must be turned such that the milled side INSIDE, faces a specific direction.
I just need help detecting the milled side only. I can write the ladder. The type of sensor to use. But it MUST be non-contact! I don't know if infrared-based based sensors will be practical. Doesn't matter if it deferentiates shallow from deep with an analog or digital output signal. Will be much appreciated! Thanks in-advance.
Picture (by Wonder S)
Picture for the above post. Sorry.
(no subject) (by Jorge Jacome)
If I fully comprehend what you want to achieve,the outside surface nearly follows the inside surface , in that case I will suggest to use part number QT50ULBQ6 from Banner, it is an ultrasound distance detector with a 4-20 ma output with a very long range distance of operation; which will not be affected by the heat.In addition to that some kind of servo-mechanism for travel up and down or viceversa in conjunction with the ultrasound detector attached to it; then get samples distances by reading while the servo-mechanism travel on the Z-axis --- got me ?
Hope it helps, and not confuse you more regards Jorge
(no subject) (by Wonder S)
Loud and clear, Jorge. Thank you very much! Will search for the sensor.
(no subject) (by Jorge Jacome)
Can you send pictures later on of your project update during progress stages.
regards Jorge
(no subject) (by David R)
Hi could you make a short video and put it on utube explaining
and showing what you are trying to sense. I know you said MUST NOT TOUCH!! but could something touch supper lightley say a glass probe, as I did some probing work on my CNC mill using ldmicro, mach3 and small load cells and i used the analog inputs and look for a change in value which was so light you could not even feel it touch you. Regards David
(no subject) (by Jorge Jacome)
I think the reason is because the surface is very hot
regards Jorge
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