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IRB 2400 brake issue

AN_custom-pak
AN_custom-pak ✭
in Robot Controller
Have notice in the past couple of days that axis 4 and 6 on one of our IRB2400 has been surprisingly easy to move manually. When our production run stops I am going to do a brake check on this robot. But I would like to know if anyone else has had this issue. Could it be that some oil got onto the brakes? Also are the brakes sealed from outside elements? We are cutting plastic parts that put out a lot of fine dust, when heated melts to the shape of what ever it happens to be on.

Thanks,
Austen

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  • dhyan
    dhyan ✭
    Dear Austen

            I had has Brake Release issue when my IRB6620 had Oil Leakage problem on its axis-2. I must do 3 way : change the oil, change the servomotor and change the gearbox (of course supported by ABB personel service).

            On your issue (the brake release suddently activate) only happen if there is a 24VDC flows to the servomotor wiring. Activate the brake release button on the base of the robot mean (I think) that 24VDC activate the brake release system on the servomotor. When I replace the servomotor (there was no 3-phase power, of course), I must flow 24VDC by external power supply to release the brake. By my experience, there is no problem that some oil got onto the brakes, because oil is an electric isolator, not a electric conductor. And it's OK if there are some oil on your gear (sprocket) of the axis.

            My suggestion on your case is please check : is there any 24VDC flow to your brake release system (on servomotor)?

    I hope this will help.

    BR

    Dhyan W

    fear of GOD is the beginning of wisdom
  • AN_custom-pak
    AN_custom-pak ✭

    [QUOTE=dhyan]Dear Austen

            I had has Brake Release issue when my IRB6620 had Oil Leakage problem on its axis-2. I must do 3 way : change the oil, change the servomotor and change the gearbox (of course supported by ABB personel service).

            On your issue (the brake release suddently activate) only happen if there is a 24VDC flows to the servomotor wiring. Activate the brake release button on the base of the robot mean (I think) that 24VDC activate the brake release system on the servomotor. When I replace the servomotor (there was no 3-phase power, of course), I must flow 24VDC by external power supply to release the brake. By my experience, there is no problem that some oil got onto the brakes, because oil is an electric isolator, not a electric conductor. And it's OK if there are some oil on your gear (sprocket) of the axis.

            My suggestion on your case is please check : is there any 24VDC flow to your brake release system (on servomotor)?

    I hope this will help.

    BR

    Dhyan W

    [/QUOTE]

    The brakes are not suddenly releasing. I had just noticed that I was able to move axis 4 and 6 easily with motors off, and I thought it may be a brake issue.
    I am not sure how the brakes work. I figured they worked like a car, with pads (I'm clueless) and I thought maybe some oil got onto the pads causing the axis' to move easily. Could anyone enlighten me on how the brake system works on an IRB2400?

    Thanks,
    Austen

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