KRC2ed05 fan noise

    Hi there,

    I’d like to know if my KRC2ed05 fans and temp sensor are working within the correct parameters.

    I’ve run a few milling toolpaths recently on my KRC2ED05. The files are around 2.5mb and the KR150 arm is running fairly swiftly at 9000mm/min for about 30-45 minutes. At random intervals, for around 5 minutes each time the big fans have come on during these cycles. I've noticed in particular if the 7th rotary axis is also involved that the fans are triggered more often.

    My question is. Is this normal? If not what should i be looking out for or monitoring?

    Many thanks

    The KRC has multiple internal temperature sensors that will throw errors or warnings if the temperature gets too high. I wouldn't be too worried about fan action unless you're also seeing other warning signs. It's possible to set the external fans to run continuously, in fact (setting $FAN_FOLLOW_UP_TIME to 1000).

    One thing about the KRC is that the internal air is separated from external air -- it's not hermetically sealed, but in general there's no circulation of outside air into the KRC interior (or vice versa), unless you leave the cabinet door open (don't do that).

    The back and sides of the KRC2 are double-walled, and that void space is where the heat sinks for the drives go. The internal cabinet air is circulated around the internal side of the heat exchanger, and external air is blown over the external sides of the heat exchanger. So internal heat has to go air->metal->air. This is less thermally efficient than simply blowing lots of fresh air through the KRC2, but it keep (most) dust and fumes out of the cabinet.

    Since the servo amps are the biggest heat sources in the KRC, hearing the fans spool up more when the robot is moving faster, or moving more axes, doesn't surprise me.

    I have very serious noise problem with ebm-papst 24v krc2ed05 pc fan (the fan that cools pc inside cabinet)

    This fan gets about 27V and has tacho output to mfc3 if disconect it due to tacho

    kss reports error...

    The fan has no problem(for example bad bearings) but due to lot of rpm make crazy noise

    more than the big cabinet fans.

    What can i do for this probem ?

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