AX2850 Problem!

We are using the AX-2850 to drive 2-DC Motors, the 2 channels behaves in one direction with normal operation while the reverse direction has a
2 seconds period of working time (it turned off after about 2 second from the run command). The tests was in OPEN LOOP OPERATION MODE. Already, we upgrade the firmware to latest beside the last version of the PC RoboRun SW.

Note: There is another AX-2850 working perfectly on the same moters in similar test with the same RoboRun configuration.

We have no explanation for the problem you describe.

If you can, replace the misbehaving controller with the one that works. If the working one also misbehaves, this would point to a problem with the encoders and/or wiring. If it works well, then the controller is bad and you should contact us for repair.

<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">We have replaced the misbehaving controller with the one that works, and it worked just well as expected.</SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"></SPAN>
<SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"></SPAN>
<SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">I would be grateful if you guide us to repair the controller locally because of our urgent need to the controller right as soon as possible.</SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"> </SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">The full description of the case I'm having is like this:</SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">The controller is working perfectly in one direction, i.e. if i send </SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">!a10</SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"> every 500 ms the controller respond <SPAN style="FONT-FAMILY: Verdana">!a10+ </SPAN>and it execute the command physically. </SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"> </SPAN>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">On the other hand, when I send <SPAN style="FONT-FAMILY: Verdana">!A10</SPAN> the controller respond only to the first command by replying with <SPAN style="FONT-FAMILY: Verdana">!A10+</SPAN> and execute the command physically, but after that, it stop responding and after 2 seconds it is reseted by itself and it send one charecter W for one time. Meanwhile, if we send any command in the duration before the reseting the controller reply inpredictably, for example it reply with something like <SPAN style="FONT-FAMILY: Verdana">!A</SPAN> or <SPAN style="FONT-FAMILY: Verdana">!A1</SPAN>.</SPAN>

The fact that it would stop after a second might indicate that the watchdog is enabled. Try resetting the controller's default parameters (press and hold the Prog &amp; Set buttons as you reset, until the display flashes), or upload the firmware again.

If the controller is still failing, please contact us via <A href="dev.roboteq.com/dev1/contactus.html" target=_blank>www.roboteq.com/contactus.html to arrange a repair.