Hi, I'm new to electronics. I am currently building a CNC router from scratch and have incorporated an automatic tool change (ATC) spindle into the build. The manual for the ATC states that there are 3 sensors.
1. to detect the presence of the tool
2. to detect that the tool holder is open to allow for a new tool to be inserted or the present tool to be released.
3. a sensor that detects rotation.
I need these sensors to all work together to ensure that the spindle can't eject a tool accidently when rotating at 20000 RPM.
The last sensor that detects motion is the one that i can't figure out how to only send a signal to the machine when the tool is motionless.
The way the sensor is explained in the manual is that the sensor will send a high signal for 1/4 of the spindles rotation followed by a low signal for 1/4, so the high signal gets sent twice per revolution. Once the spindle is spinning fast enough it will appear as if the sensor is sending a constant high signal.
The problem i see is that the sensor could come to a stop on either a high or low signal 50% of the time. How do i build some sort of a signal that will only send out a high signal when the spindle is at a stand still. Does it have to be time based or comparative?
Thanks for all your help. I'm mechanically inclined, and average at best with electronics.
The manual states:
-The sensor S3 supplies two on pulses and two off pulses for every rotation of the shaft.
Above a certain speed range the sensor may appear to send a permanent on signal returning to normal once speeds reduce.
-Ignore the tool change sensor during the tool change phase as it may appear to be on either of the two states
1. to detect the presence of the tool
2. to detect that the tool holder is open to allow for a new tool to be inserted or the present tool to be released.
3. a sensor that detects rotation.
I need these sensors to all work together to ensure that the spindle can't eject a tool accidently when rotating at 20000 RPM.
The last sensor that detects motion is the one that i can't figure out how to only send a signal to the machine when the tool is motionless.
The way the sensor is explained in the manual is that the sensor will send a high signal for 1/4 of the spindles rotation followed by a low signal for 1/4, so the high signal gets sent twice per revolution. Once the spindle is spinning fast enough it will appear as if the sensor is sending a constant high signal.
The problem i see is that the sensor could come to a stop on either a high or low signal 50% of the time. How do i build some sort of a signal that will only send out a high signal when the spindle is at a stand still. Does it have to be time based or comparative?
Thanks for all your help. I'm mechanically inclined, and average at best with electronics.
The manual states:
-The sensor S3 supplies two on pulses and two off pulses for every rotation of the shaft.
Above a certain speed range the sensor may appear to send a permanent on signal returning to normal once speeds reduce.
-Ignore the tool change sensor during the tool change phase as it may appear to be on either of the two states