IR Probe 1.4
- 1 Overview
- 2 Specifications
- 3 Improvements from 1.3
- 4 Backwards Compatibility
- 5 HotEnd Compatibility
- 6 Electronics Compatibility
- 7 Configuring Firmware
- 8 Connecting
- 9 Notes
- 10 Buy It
- 11 Resources
These 3D Printer Z-Probes use modulated infra-red LEDs to accurately detect proximity to the print surface, allowing for automatic bed-levelling while printing.
Compared to mechanical probe solutions - such as a servo and microswitch - these boards have the advantage of requiring no moving components, weighing less, and having a higher degree of repeatability and reliability. Compared to inductive or capacitive probes, these boards are less dependent on the material of the print surface, and will even work on glass. Combined with a high degree of immunity from background IR sources, these boards are ideal for nearly any printer build.
We've designed these boards to couple to a standard 30mm fan - this means they're immediately compatible with all E3D-V6 and Lite6 HotEnds, mounting directly to the fan with no modification or adaptor necessary. Additionally, these boards use a lightweight cable with a compact connector, in order to make wiring as easy as possible.
To mount to a printer without a suitable 30mm fan, all that is required are two screw holes. These should be spaced 24mm apart horizontally, and at a distance of 22mm above the tip of the nozzle. See the attached mechanical drawings for further information.
These probes will trigger at a distance of 3mm from the print surface. Recommended mounting height is that the bottom edge of the PCB be 1-2mm above the tip of the nozzle, and the probe's Z-offset can be tweaked in firmware to achieve the desired bed-levelling results.
- Dimensions: 30.00x23.75mm
- Weight: 2.5g (excluding cable)
- Trigger distance: 3mm from edge of PCB
- Trigger Repeatability: 0.005mm (5µm) Standard Deviation
- Included Cable Length: 100cm
Improvements from 1.3
Compact Form Factor
- capacitor C1 decreased in height to reduce profile of board, easier to fit probe in tight spaces
- smaller JST-SH connector used, connector no longer protrudes from body of probe
Selectable Digital or Analog Output
- separate output pins for both modes
- mode no longer dependent on automatic detection of control board
Improved Control Board Compatibility
- strong pull-ups on certain control boards no longer prevent probe from working
- faster boot time (<1s instead of 6s)
V1.4 is largely backwards compatible with V1.3. The mechanical mounting holes and dimensions are identical, and all mounting arrangements for V1.3 should work fine with V1.4.
Notably, the provided cable is different, so a re-wire may be necessary to swap to V1.4.
These are the HotEnds we've tested with or had reports of success with. If you're interested in trying something different, or if you've tried a different HotEnd with our probe, let us know how it went!
|E3D-V6||Yes||No||Mounts to fan duct with existing screws|
|E3D-Lite6||Yes||No||Mounts to fan duct with existing screws|
|E3D Chimera||Yes||No||Mounts to fan duct with existing screws|
|E3D Cyclops||Yes||No||Mounts to fan duct with existing screws|
|E3D-V6 or Lite6 with Volcano||Yes||Yes||Printable adaptor available here.|
|Mark8 Extruder + Hotend Combination||Yes||Yes||Printable adaptor available here.|
These are the boards we have tested the probe with. It is likely the probe is compatible with other boards as well - if you try a different control board and it works, let us know so we can add it to the list.
|Motherboard||Electronics Compatible||Connector Compatible||Notes|
|RAMPS||Yes||Yes||Connect to Z-min endstop, leave 4th pin (yellow) disconnected|
|RAMBO||Yes||Yes||Connect to Z-min endstop, leave 4th pin (yellow) disconnected|
|RUMBA||Yes||Yes||Connect to Z-min endstop, leave 4th pin (yellow) disconnected|
|Smoothieboard||Yes||Yes||Connect to Z-min endstop, leave 4th pin (yellow) disconnected|
|Melzi||Yes||No||Wires must be cut for screw terminals, and 5V wired to separate pin. Wiring sketch included below|
|Duet||Yes||No||Need to change order of pins in connector to suit, simple to do though|
|Azteeg X5 Mini||Yes||No||Wires must be cut for screw terminals|
|MKS Gen / Base Boards||Yes||No||Some boards need different connector|
RAMPS, RAMBO, RUMBA
Each IR Z Probe comes with a cable that will connect directly to the endstop pins on these control boards. No modification should be required. Make sure to align and orient the connector correctly - the red wire should match the '+' indicator on the board.
Azteeg X5 Mini
Screw terminals are used to connect bare wires to the X5 for all endstops. The included cable will need the connector removed / cut off, and each wire stripped back to allow connection.
After receiving power the on-board LED will flash twice, indicating the board is ready for use.