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Mini Differential IR Height Sensing Board 

This is v1.3. 

Please read available online resources for connections. We are not responsible for board damage that is caused by being misinformed.

The Mini Differential IR height sensing board is a contactless Z probe for 3D printers. It provides the following features:

• A differential modulated IR height sensor. The sensor detects the target height by looking for the reflected light from two separate LEDs to be equal. The two LEDs are positioned such that they reflect light into the sensor at slightly different heights. This allows the sensor to be used on almost any bed surfaces.
• A high degree of immunity from sunlight, incandescent artificial light, and other background sources of IR.
• Unlike capacitive and inductive sensors, the sensor measures the height to the top surface of a glass bed, not the distance to a backing plate.
• A red LED indicates when the head is at or below target height.
• Small size, ideal for use where space is restricted, such as under the effector of a delta printer. The board is just 24mm wide and 18mm high, small enough to fit below the heatsink of a genuine E3Dv6 hot end.
• Automatic selection of a 4-level analog output for printer electronics that support it (e.g Duet), or a digital output for other printer electronics.

Specification

• Power: 5V or 3.3V
• Maximum current draw: 20mA @ 5V, or 12mA @ 3.3V
• Size: 18mm high x 24mm wide x 10mm deep
• Weight: 2g (board and 3-way header, excluding socket)
• Trigger height to 3mm glass target on top of black paper: between 2.5mm and 3.5mm
• Reproducibility of repeated probing at same spot: approx. 0.01mm

Buy an IR height sensor from #Spool3D for your 3D printer in Canada without the surprise cost of the exchange rate!