mirror of
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87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
#!/usr/bin/env python3
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# Copyright 2026 514 LLC d/b/a OpenGlow
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# Written by Scott Wiederhold
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# https://community.openglow.org
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# SPDX-License-Identifier: MIT
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"""Sustained-load test for periodic flow re-checks.
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Question: what does repeated interrogation cost thermally over a long
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job, and does the loop reach equilibrium or climb without bound? Runs
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the driver's real check cadence (M8 held for the duration) with the
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cut-profile fans, logging bulk coolant temperature and every verdict.
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Needs the controller running with forgectrl's cooling engine (the
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verdict lines arrive on the Grbl socket). Runs on the board or from a
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host (gfbench: GF_HOST).
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Usage: flow_sustained.py [minutes] (default 30)
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"""
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import re
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import socket
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import sys
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import time
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from gfbench import HOST, board, degc, setting
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THRESHOLD = float(setting('cool_flow_rise', 14.4)) # forgectrl's configured threshold
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def temps():
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o = board('cat /sys/glowforge/pic/water_temp_1 /sys/glowforge/pic/water_temp_2').split()
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return degc(o[0]), degc(o[1])
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minutes = float(sys.argv[1]) if len(sys.argv) > 1 else 30
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s = socket.create_connection((HOST, 23), timeout=5)
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s.settimeout(0.3)
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time.sleep(0.5)
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try:
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while s.recv(4096):
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pass
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except socket.timeout:
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pass
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d0, u0 = temps()
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print('start: down=%.2f up=%.2f running M8 for %.0f min' % (d0, u0, minutes))
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s.sendall(b'M8\n')
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t0 = time.time()
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verdicts = []
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peak_up = u0
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buf = ''
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while time.time() - t0 < minutes * 60:
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try:
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buf += s.recv(4096).decode('ascii', 'replace')
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except socket.timeout:
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pass
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for line in buf.split('\n'):
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if 'flow' in line and ('verified' in line or 'FAULT' in line):
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m = re.search(r'rise ([\d.]+) C', line)
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if m and (not verdicts or verdicts[-1][1] != float(m.group(1))):
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el = (time.time() - t0) / 60
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verdicts.append((el, float(m.group(1)), 'FAULT' in line))
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d, u = temps()
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peak_up = max(peak_up, u)
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print(' %5.1f min rise=%5.2f %-8s loop down=%.2f up=%.2f (%+.2f from start)'
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% (el, float(m.group(1)), 'FAULT' if 'FAULT' in line else 'ok', d, u, u - u0),
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flush=True)
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buf = buf[-2000:]
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time.sleep(5)
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s.sendall(b'M9\n')
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time.sleep(1)
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s.close()
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d, u = temps()
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print()
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print('checks run: %d over %.0f min' % (len(verdicts), minutes))
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if verdicts:
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rises = [v[1] for v in verdicts]
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print('rise values: min=%.2f max=%.2f mean=%.2f (threshold %.1f)'
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% (min(rises), max(rises), sum(rises) / len(rises), THRESHOLD))
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print('false faults: %d' % sum(1 for v in verdicts if v[2]))
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print('loop temperature: start %.2f -> end %.2f (%+.2f C), peak %.2f'
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% (u0, u, u - u0, peak_up))
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print('cadence: %.1f min between checks' % (minutes / max(1, len(verdicts))))
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