114 lines
2.9 KiB
Markdown
114 lines
2.9 KiB
Markdown
---
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tag: m0917
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title: L6474 Overcurrent Warning Test
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brief: Find L6474 minimum current thresholds
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author: shitcreek
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requires: MONITOR_L6470_DRIVER_STATUS
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group: L6474
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codes: [ M917 ]
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related: [ M916, M918]
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notes:
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- Requires `MONITOR_L6470_DRIVER_STATUS`.
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- All tests assume each axis uses matching driver chips.
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parameters:
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-
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tag: J
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optional: true
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description: Select which driver(s) to monitor on multi-driver axis.
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values:
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-
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tag: 0
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description: (default) Monitor all drivers on the axis or E0.
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-
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tag: 1
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description: Monitor only X, Y, Z, E1.
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-
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tag: 2
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description: Monitor only X2, Y2, Z2, E2.
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-
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tag: 3
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description: Monitor only Z3, E3
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-
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tag: 4
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description: Monitor only Z4, E4
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-
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tag: 5
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description: Monitor only Z5, E5
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-
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tag: 6
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description: Monitor only Z6, E6
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-
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tag: 7
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description: Monitor only Z7, E7
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-
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tag: X
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optional: true
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description: Monitor X with the given displacement (1 - 255mm) on either side of the current position.
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values:
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-
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type: mm
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-
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tag: Y
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optional: true
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description: Monitor Y with the given displacement (1 - 255mm) on either side of the current position.
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values:
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-
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type: mm
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-
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tag: Z
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optional: true
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description: Monitor Z with the given displacement (1 - 255mm) on either side of the current position.
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values:
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-
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type: mm
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-
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tag: E
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optional: true
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description: Monitor E with the given displacement (1 - 255mm) on either side of the current position.
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values:
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-
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type: mm
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-
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tag: F
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optional: true
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description: Feedrate for the moves. If unspecified, uses the max feedrate.
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values:
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-
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tag: feedrate
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type: int
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-
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tag: I
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optional: true
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description: Starting overcurrent threshold. Report current value from driver if not specified. If there are multiple drivers on the axis then all will be set the same.
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values:
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-
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tag: current
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type: int
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-
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tag: T
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optional: true
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description: Current (mA) setting for TVAL (0 - 4A in 31.25mA increments, rounds down) - L6474 only. Report current value from driver if not specified.
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values:
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-
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tag: current
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type: int
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-
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tag: K
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optional: true
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description: Value for KVAL_HOLD (0 - 255) (ignored for L6474). Report current value from driver if not specified
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values:
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-
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tag: Kvalue
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type: int
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---
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The `M917` command runs a test procedure to find the minimum stepper current thresholds.
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- Decrease OCD current until overcurrent error
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- Increase OCD until overcurrent error goes away
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- Decrease stall threshold until stall (not done on L6474)
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- Increase stall until stall error goes away (not done on L6474)
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