This question is more to the Lynxmotion Engineer. I have just post this question to one of your engineer, but just want to see whether there is any more suggestion and advice that I can get.
Can the AL5A(does not matter whether its the A,B,C or D Model) ARM robot being control with NI DAQ. from my understanding, the servos (HS-422, HS-475HB,HS-755HB) which has three pin, where yellow pin=signal, red pin=voltage supply (4.8-6.0V) and black pin=ground, requires to be connected to analog input channel (yellow pin) and analog output channel (red). This means that it can be done by any of NI DAQ with Analog Input / Analog Output Module, right?
Can anyone clarify on this? Does it mean I can purchase the Hardware No Electronic Kit for this project?
there are no signals being returned FROM a hobby servo such as an hs-422, 475, 645, etc so you would use outputs ONLY from a DAQ.
it is not recommended you attempt to power a hobby servo (red wire) directly from an analog output of a DAQ… unless it is rated for several amperes of current. think about it… you are effectively powering a small dc brushed motor. just power it from a beefy 5V to 6V power supply output.
the control signal output TO the servo is more digital than analog. It is a PWM (ie pulse width modulated) waveform having a 20ms frame rate with pulses varying from 0.75ms to 2.25ms in duration.
you might find it much easier to use a timer output board to generate pulses than discrete digital i/o pins.
for the cost of even the smallest NI DAQ board with the least capability you could buy roughly (10) SSC-32 controllers.
Thank you for your response. The moment I posted the question yesterday, I haven’t gone through more on the servo specification where there it stated that the output signal is a pulse width. Obviously, it can not be connected to the AI module of any DAQ. it is supposed connected to a TTL channel.
NI AO card normally drives a very small amount of current which I believe it is not enough to supply to the servo. I also found out from the lynxmotion website that the servo is power up via battery, right??
[for the cost of even the smallest NI DAQ board with the least capability you could buy roughly (10) SSC-32 controllers.] <— yes, i understand this but with the NI DAQ card, the functionality is wider which can be expand in future. Furthermore, the end-user already has the NI DAQ.
