Cover the minimum pulse width; record what the density ladders measured

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Rule 15 in the stream harness holds both halves of the minimum
(grblHAL-glowforge f7e8c17, pinned here): no emitted burst falls below
laser_pulse_min_ticks, excepting one clipped by fire going off mid-burst,
and the levels too faint to fill a window still render their exact
average density. Checked against a run at minimum 1 so it cannot pass
vacuously - level 2 goes from 444 bursts of one tick to 147 of three at
the same density, and levels already above the minimum are unchanged.

Four bench ladders settle the base period at 20. The same six rungs
marked in all of them, and the matched pairs across periods separate the
variables: at identical pulse length, halving the density killed the
mark; at identical density, varying the pulse 3x changed nothing. Feed
does not move it either - 10 percent at F100 carries 44 percent more
energy per mm than 20 percent at F300, which marks, and still left
nothing. The low-end marking limit is average power, not dose per length
and not pulse length.

The F100 trace separates two failures that look alike on the material:
seven current segments for eight rungs, anchored by a flat saturated
final segment that can only be full density, put 5 percent at no
discharge at all and 10 percent at a full 15 seconds of current with no
mark. Only the first is ours, and the minimum pulse is the answer to it.

Also recorded: the factory's Precision Power 1 runs a 19.53 percent FIRE
duty cycle at full PWM duty, and its 1-100 scale maps onto density
18.9-79.5 percent, so its 1 percent is the bottom of the useful band
rather than 1 percent of the range. Under the density model $35 and $36
are that same control - a density floor and ceiling - which makes the
user-facing scale a settings choice rather than new code.

This commit is contained in:

ScottW514

2026-08-17 21:37:41 -04:00

parent b7091effb7

commit a3e83c4fd5

4 changed files with 165 additions and 14 deletions

									
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				# changes; keep only SRCREV and PV here - the image manifest leaves

				# *-pin.inc out of the layer content hash because the component entry

				# already identifies the pinned source (forgefirm-image-manifest.bbclass).

				SRCREV = "2bca017854291f4084ca2bdf6f1ffaed88ff6d4f"

				SRCREV = "f7e8c17bb3065a6b27cef4bb1099c9564359980e"

				PV = "0.1.0"