Idle current of 0 resets homed status in 3.3
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The whole printer or just a single axis loses homed status?
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@phaedrux The whole printer.
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@generisi said in Idle current of 0 resets homed status in 3.3:
An idle current of zero for the tool coupler stepper in the e3d tool changer causes the printer to lose "homed" status. The stepper is geared and current does not have to be applied to keep a tool locked in place. I also have a coupler of extruders (Orbiter base design) that don't need current when they are standing by.
What if you don't reduce the current to zero?
Frederick
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@fcwilt When I set it to 10%, it worked fine.
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@generisi said in Idle current of 0 resets homed status in 3.3:
@fcwilt When I set it to 10%, it worked fine.
Then do that - trying to save the remaining 10% won't make much difference.
Good luck.
Frederick
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@dc42 I am guessing that there is something in the firmware that assumes an axis stepper that is not powered means that homing cannot be maintained, which i think is a reasonable assumption.
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Yes that's the case. Once power has been removed the firmware can no longer guarantee the position. Even if it only unhommed just the coupler axis, would you really want it to proceed with the rest of the motion commands for the other axis until it got to a command for the coupler which would fail with an unhommed axis error anyway?
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@phaedrux Is the same true for extruders? Some gearing stepper combinations make movement while power is off unlikely.
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Even if you don't see a noticeable movement the stepper coils will snap the nearest full step when powered on.