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Subject: Re: Replicator weird noise and print fails
From: Jetty <clelland...@gmail.com>
To: MakerBot Operators <makerbot@googlegroups.com>
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Another possibility....

If the eeprom area of the firmware gets reset / wiped, then the Z axis
maybe running in the opposite direction, which would
produce the effect you're seeing.  5.5 firmware doesn't set this value
automatically when it detects a blank eeprom.

Also, the AVR browning out could cause the eeprom to wipe (as we found
out happened on the ToM.

Connect the bot to RepG, and go to Onboard Preferences, and verify
that:

X/Y/Z and B (left extruder) are inverted

Another cause can be too high a feed rate on the Z axis, causing
skipping, which can also be related to your acceleration
settings.

On Sep 15, 2:36=A0pm, Shawn <sgro...@open2space.com> wrote:
> can you manually lift the platform? =A0I'm wondering if you have some
> plastic in the geared rod that is jamming the movement causing the motor
> to skip. =A0Normally when a stepper grinds away like that, the axis can't