M916 - L6474 Thermal Warning Test

L6474 Find L6474 drive level (KVAL_HOLD) threshold MONITOR_L6470_DRIVER_STATUS

Description

M916: increase KVAL_HOLD until thermal warning. This routine is also useful for determining the approximate KVAL_HOLD where the stepper stops losing steps. The sound will get noticeably quieter as it stops losing steps.

Notes

Requires MONITOR_L6470_DRIVER_STATUS.

All tests assume each axis uses matching driver chips.

On the L6474 the TVAL is used instead of KVAL.

Usage

M916 [D<second>] [E<mm>] [F<feedrate>] [J<0|1|2|3|4|5|6|7>] [K<Kvalue>] [T<current>] [X<mm>] [Y<mm>] [Z<mm>]

Parameters

`[D<second>]`	Time (in seconds) to run each setting of KVAL_HOLD/TVAL. (Default zero, to run each setting once.)
`[E<mm>]`	Monitor E with the given displacement (1 - 255mm) on either side of the current position.
`[F<feedrate>]`	Feedrate for the moves. (Default max feedrate if unspecified.)
`[J<0\|1\|2\|3\|4\|5\|6\|7>]`	Select which driver(s) to monitor on multi-driver axis `J0`: (default) Monitor all drivers on the axis `J1`: Monitor only X, Y, Z, E1 `J2`: Monitor only X2, Y2, Z2, E2 `J3`: Monitor only Z3, E3 `J4`: Monitor only Z4, E4 `J5`: Monitor only Z5, E5 `J6`: Monitor only Z6, E6 `J7`: Monitor only Z7, E7
`[K<Kvalue>]`	Value for KVAL_HOLD (0 - 255) (ignored for L6474). If unspecified, report current value from driver.
`[T<current>]`	Current (mA) setting for TVAL (0 - 4A in 31.25mA increments, rounds down) - L6474 only. If unspecified, report current value from driver.
`[X<mm>]`	Monitor X with the given displacement (1 - 255mm) on either side of the current position.
`[Y<mm>]`	Monitor Y with the given displacement (1 - 255mm) on either side of the current position.
`[Z<mm>]`	Monitor Z with the given displacement (1 - 255mm) on either side of the current position.