Steppers moving when powered off

For the Lowrider v3, are the Z steppers supposed to fall down when I power down the machine? I noticed that one side falls while the other side maintains its height. Is there something I need to do to lock the position when I power down the machine?

all lowriders does exactly like that, some of us are putting some blocks (3d printed, wood etc) under the beam and holding it.

you can use a different screw but that implies software/firmware changes

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For the LR3, I use these.

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Thanks all. This is helpful. I went ahead and printed the park stops. Thanks again.

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