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Registered Member #3315
Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
I FREQUENT 4HV BUT IN ANOTHER SECTION, BUT I SUPPOSE THIS IS THE RIGHT FORUM TO ASK. HOPPING YOU COMPUTER GUYS CAN HELP ME OUT. MY QUESTION IS , WHICH TO USE AND WHY.
I HAVE 3 OPTIONS IN THIS ENCODER (.PDF ATTACHED)
1) TTL OUTPUT 2) RS422A LINE DRIVER 3) OL72725-26 VDC LINE DRIVER
IT WILL BE USED TO MEASURE ANGULAR ROTATION OF A CONTINOUS ROTATION "SERVO" CONTROLLED BY AN ARDUINO MEGA 2560
Registered Member #4266
Joined: Fri Dec 16 2011, 03:15AM
Location:
Posts: 874
Hi ben5017
I would use the TTl, the servo should be pumped with square wave, the rs332 won't register the individual bits(have party etc), The other I'm guessing is a ADC, and unless hacked won't be much use.
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
200 kHz response is fairly slow, but easy to track without using chip level hardware counters. TTL is a discreet position sensor, and has more options for implementing control loops.
For example, some people only use one phase to figure out rotational velocity from the cycle period.
Registered Member #3315
Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
thanks guys TTl it is then.
RED: you mentioned it had slow response time. do you forsee any performance issues with my intended use
- will be attached to a shaft connected to a hobby servo. upon press of a button it will rotate the servo a set number of degrees. (360/13* to be exact). every time the button is pressed, It will stop the servo and hold the position once the once it travels the set number of degrees.I have never worked with encoders so I am not really sure what to expect.
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ENCODER TO ARDUINO OUTPUT?
