Difference between revisions of "IR Probe 1.3"

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(Compatibility table, Melzi sketch)
Line 28: Line 28:
|Yes
|Yes
|Wires must be cut for screw terminals, and 5V wired to separate pin. Wiring sketch included below.
|Wires must be cut for screw terminals, and 5V wired to separate pin. Wiring sketch included below.
|-
|Smoothieboard
|No
|No
|Pullup too strong, external resistor required between ground and signal (value uncertain, 500R-1.8K, experimentation needed).
|-
|Azteeg X5 Mini
|No
|No
|Pullup too strong, external 1.6K resistor required between ground and signal.
|-
|-
|}
|}
== Configuring Marlin ==
== Configuring Marlin ==
The pullup for the Z_MIN endstop needs to be enabled. Uncomment the line:
The pullup for the Z_MIN endstop needs to be enabled. Uncomment the line:

Revision as of 11:33, 16 December 2015

Overview

Specifications

Compatibility

Motherboard Connector Compatible Electronics Compatible Notes
RAMPS Yes Yes
RAMBO Yes Yes
RUMBA Yes Yes
Melzi No Yes Wires must be cut for screw terminals, and 5V wired to separate pin. Wiring sketch included below.
Smoothieboard No No Pullup too strong, external resistor required between ground and signal (value uncertain, 500R-1.8K, experimentation needed).
Azteeg X5 Mini No No Pullup too strong, external 1.6K resistor required between ground and signal.

Configuring Marlin

The pullup for the Z_MIN endstop needs to be enabled. Uncomment the line:

 #define ENDSTOPPULLUP_ZMIN

The endstop should be set to non-inverting:

 const bool Z_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.

Enable auto-bed levelling:

 #define ENABLE_AUTO_BED_LEVELING // Delete the comment to enable (remove // at the start of the line)
 #define Z_PROBE_REPEATABILITY_TEST  // If not commented out, Z-Probe Repeatability test will be included if Auto Bed Leveling is Enabled.

Recommended bed levelling mode is grid:

 #define AUTO_BED_LEVELING_GRID

Adjust the coordinates that define the corners of the probed grid:

 #define LEFT_PROBE_BED_POSITION 50
 #define RIGHT_PROBE_BED_POSITION 150
 #define FRONT_PROBE_BED_POSITION 20
 #define BACK_PROBE_BED_POSITION 180

Set the grid size:

 #define AUTO_BED_LEVELING_GRID_POINTS 2

Configure the probe offset from the nozzle:

 #define X_PROBE_OFFSET_FROM_EXTRUDER 30     // Probe on: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 0     // Probe on: -front +behind
 #define Z_PROBE_OFFSET_FROM_EXTRUDER -1.95  // -below (always!)

Configure homing / probing settings:

 #define Z_RAISE_BEFORE_HOMING 4       // (in mm) Raise Z before homing (G28) for Probe Clearance.
                                       // Be sure you have this distance over your Z_MAX_POS in case
 #define XY_TRAVEL_SPEED 8000         // X and Y axis travel speed between probes, in mm/min
 #define Z_RAISE_BEFORE_PROBING 5   //How much the extruder will be raised before traveling to the first probing point.
 #define Z_RAISE_BETWEEN_PROBINGS 2  //How much the extruder will be raised when traveling from between next probing points
 #define Z_RAISE_AFTER_PROBING 5    //How much the extruder will be raised after the last probing point.

When using a probe instead of an endstop, it's a good idea to enable Z_SAFE_HOMING. This moves the probe to the center of the bed before homing:

 #define Z_SAFE_HOMING   // This feature is meant to avoid Z homing with probe outside the bed area.

By default the point that the probe homes at should be the center of the bed - however some versions of Marlin contain a bug where the probe point is miscalculated. To be safe, you can manually define the probe point:

 #define Z_SAFE_HOMING_X_POINT (100)    // X point for Z homing when homing all axis (G28)
 #define Z_SAFE_HOMING_Y_POINT (100)    // Y point for Z homing when homing all axis (G28)

Connecting

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.

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. In addition, the pull-up resistors on the X5 are not compatible with the IR Z Probe by default. To correct this, a 1.6K resistor can be placed in the screw terminal, between the signal and ground wires. This should allow correct operation of the probe.

Notes

After receiving power, the probe takes a short while before becoming active. The onboard LED will flash twice, and after this the board is ready for use.

Resources

Mounting Drawing Wiring Melzi