Gen 1 Makerbot Dual X axis homing issues

Mbanzi

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Jan 29, 2021, 4:28:33 PM1/29/21

to Makerbot Users

I have an original Makerbot Replicator Dual which has been my workhorse for years. Firmware was upgraded to Sailfish, extruders rebuilt, and suggested mods made to the Mightyboard. It's connected via OctoPi as most people do now. It's been flawless for several years, just regular cleaning & maintenance.

Lately the printer has not been homing on the X axis. Whether I use the "Home Axes" function on the printer or a G-Code "G28 X Y Z", the Y & Z axes home but the X remains stationary. I can move it along the X-axis using the jog functions on the printer or via Octoprint, so X isn't dead. It appears it's only in the +X direction that it's not moving, e.g. from -40,40 a G1 X40,40 will not move the extruder.

Any ideas where to start looking? Stepper motor? Driver module? New printer?

Joseph Chiu (Toybuilder)

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Jan 31, 2021, 5:46:00 PM1/31/21

to Mbanzi, Makerbot Users

You might have a faulty limit switch indication. Check to see if something has wedged the switch or if there is a continuity short on the signal line to ground.

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Mbanzi

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Feb 1, 2021, 9:37:45 PM2/1/21

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The limit switch comment got me thinking. While checking the X limit switch, the wire felt warm to touch, so I unplugged the switch PCB. Wire still felt warm! Checked the wire, and lo and behold, the insulation had rubbed through and shorted! It's alive again!

TobyCWood

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Feb 2, 2021, 12:58:05 PM2/2/21

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Wow. You're still around!

On Sunday, January 31, 2021 at 2:46:00 PM UTC-8 Joseph Chiu (Toybuilder) wrote:

Joseph Chiu (Toybuilder)

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Feb 2, 2021, 1:00:36 PM2/2/21

to TobyCWood, Makerbot Users

:) I might be lurking, but I still like to help when I can! :)

To view this discussion on the web visit https://groups.google.com/d/msgid/makerbot-users/a7fe535a-faab-4da8-9ce1-88957476e003n%40googlegroups.com.

Darrell jan

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Feb 2, 2021, 3:57:25 PM2/2/21

to Makerbot Users

Thanks for lurking!

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