Hall-O end-stop bracket for RepRapPro Huxley /w Melzi instructions
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Published on May 10, 2012
Description
This is a modified version of the original RepRapPro Z end-stop for use with the Hall-Θ hall effect sensor.
reprap.org/wiki/Hall-%CE%98
reprap.org/wiki/Hall-%CE%98
Instructions
Install using a 10mm and 30mm screw. Place nuts behind the Hall-O PCB to prevent strain.
Hall-O with Melzi electronics
To get the Hall-O end stop working with the Melzi electronics attach a resistor to the base of an NPN transistor and connect the resistor to the digital signal wire from the Hall-O. The other two legs then slot into the Z end-stop connectors on the Melzi board.
Power for the sensor can be taken from the ISP connectors in the bottom right of the board. See attached image.
Hall-O with Melzi electronics
To get the Hall-O end stop working with the Melzi electronics attach a resistor to the base of an NPN transistor and connect the resistor to the digital signal wire from the Hall-O. The other two legs then slot into the Z end-stop connectors on the Melzi board.
Power for the sensor can be taken from the ISP connectors in the bottom right of the board. See attached image.
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License
Hall-O end-stop bracket for RepRapPro Huxley /w Melzi instructions by peppertarts is licensed under the Attribution - Creative Commons license.
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How accurate have you found these sensors to be?
I've found them to be very good. They are very accurate and rarely need adjusting. However, they are definitely affected by heat. I had to move a desk lamp (with a hot 100w bulb) away from my printer as the heat from it threw the sensor off by a few millimetres.