Delta grid probes the reachable circular bed: Points outside the configured radius are skipped.
Delta grid probes the reachable circular bed #
V1 Setting V2 Setting Description

Enables the delta grid leveling strategy for height mapping across circular delta printer beds.

The strategy probes a grid of points in a circular pattern (skipping corners outside the radius) and stores height offsets. During printing, the firmware interpolates between the nearest four grid points to calculate Z compensation for any XY position.

In v2, set zprobe.leveling to "delta grid".

Radius of the circular bed area to probe and compensate, in millimeters.

The grid probes a square region, but points outside this radius are skipped, creating a circular probe pattern. This radius should be at least as large as the maximum printing radius, to ensure full bed compensation coverage.

Default: 50 mm

Grid size in both X and Y dimensions, determining the total number of probe points. A size of 7 creates a 7×7 grid = 49 potential probe points (points outside the radius are automatically skipped).

Larger grids give more accurate compensation but increase probing time significantly. Must be an odd number.

Default: 7

Offset of the probe tip from the nozzle tip in X, Y, and Z dimensions — compensating for the physical displacement between where the probe triggers and where the nozzle actually is.

Correct offsets are essential for accurate bed compensation.

Format: X,Y,Z (default: 0,0,0)

Absolute Z machine position in millimeters to move to after homing, before starting the grid probe sequence.

This safety parameter prevents the probe from crashing into the bed during the initial descent. Must be high enough to clear the bed surface.

Default: 10 mm

Automatically homes all axes before running the G31 grid probing sequence.

Homing ensures the machine is at a known position before probing, which is essential for repeatable and accurate grid generation. Disable only if you want manual control over the homing process.

Default: true

Automatically saves the M375 command to config-override when M500 is issued, causing the grid to be loaded from /sd/delta.grid on boot and compensation to be enabled automatically.

This allows persistent bed leveling across power cycles without re-probing.

Default: false

Probe tolerance for repeatability checks and validation during grid creation — used to confirm that probe measurements are consistent and repeatable across multiple probes of the same point.

Default: 0.03 mm

N/A (feature removed) DEPRECATED - This setting is no longer supported and will produce an error if used. For square or rectangular beds, use the rectangular-grid strategy instead of delta-grid.
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