Ultimate Knife Dyno скачать в хорошем качестве

Ultimate Knife Dyno

DIY Automatic Sharpness Tester – JESS v0.3 J’s Edge Sharpness System Inspired by BESS / Edge-On-Up PT50A – Constant Feed Measurement Platform This is my custom-built automatic blade sharpness tester inspired by the BESS (Blade Edge Sharpness Scale) measurement system. JESS = J’s Edge Sharpness System. Let’s state this clearly: BESS is an extremely well-designed and refined sharpness measurement ecosystem. The Edge-On-Up PT50A sharpness tester, used with DoubleX+ test media (TM02) and the ATF10G fixture, represents the benchmark for standardized blade sharpness testing. This project does not attempt to replace BESS. It is a personal engineering implementation built to explore: Constant feed motion Repeatability Dynamic vs quasi-static cutting behavior Full force–displacement curve analysis Automated measurement cycles In short: What happens if you automate the feed instead of pressing manually? Reference & Validation Control measurements were compared against: Edge-On-Up PT50A Sharpness Tester Edge-On-Up DoubleX+ Test Media (TM02) ATF10G Fixture Measured values fall within the same magnitude range as the commercial PT50A system. BESS remains the gold standard. This is simply a mechanically controlled interpretation of it. JESS v0.3 – System Overview Mechanical Platform Anycubic Photon Mono frame (repurposed linear rail system) Lead screw driven vertical motion Stepper motor controlled feed Fixed blade jig (tested with multiple clamping methods) Standardized BESS-type filament cutting media Measurement System 2 kg load cell (grams output) HX711 amplifier / ADC ESP32 firmware Automatic break detection Peak hold capture CSV streaming to PC Software: Python (Tkinter + Matplotlib) Real-time force–travel graph Peak force display Run overlay comparison Data logging for batch testing Test Method Controlled constant feed rate 0.2–2 mm/s behaves as quasi-static region Above ~3 mm/s introduces dynamic reduction in measured peak force Break detected via force drop Peak force recorded in grams Travel distance logged This system measures the actual cutting force required to sever standardized filament. Not paper slicing feel. Not thumbnail tests. Not subjective impressions. Repeatability Example Peltonen M95 (two consecutive run from video): 182 g 179 g Deviation: 3 g ≈ ±1 % For a DIY automated system, that level of repeatability is extremely satisfying. Blade Comparisons (DoubleX+ TM02 Media) Peltonen M95: ~179 g (whetstone progression to 10k + 0.5 µm strop) BIC Double Edge Razor Blade: 72 g Basic Snap-Off Utility Blade: 419 g That places the scale roughly in this range: ~80 g → extremely sharp razor territory ~150–200 g → very sharp working edge ~400 g+ → noticeably less sharp utility edge Roselli (UHC - factory blade) – Multi-Run Series #RESULT, g=221,travel_mm=17.44,travel_contact_mm=4.53 #RESULT g=217,travel_mm=17.80,travel_contact_mm=4.49 #RESULT g=226,travel_mm=18.22,travel_contact_mm=4.68 #RESULT g=225,travel_mm=17.94,travel_contact_mm=4.60 #RESULT g=246,travel_mm=19.34,travel_contact_mm=4.78 #RESULT g=243,travel_mm=17.74,travel_contact_mm=4.68 #RESULT g=216,travel_mm=16.65,travel_contact_mm=4.45 Two runs (5th and 6th) were intentionally media was slightly looser. The effect was smaller than expected — but still measurable. Which is interesting. Even with minor mounting variation, results remain within realistic magnitude and variation stays visible without catastrophic drift. That suggests the system is mechanically stable and not overly sensitive to small fixture tension differences. At the same time, it illustrates something important: If a small change in clamping tension can produce a measurable difference, it is easy to imagine how variations in manual force application, hand speed, or pressure consistency may influence results in purely manual testing. This does not diminish BESS as a standard — it simply highlights how controlled feed motion reduces one variable in the measurement chain. Observations • Constant-feed control reduces dynamic variation • Below ~2 mm/s results are stable • Above ~3 mm/s peak values begin to decrease (dynamic effects) • Mounting tension affects peak force, but less than expected • Results align with commercial BESS scale magnitudes Why Build This? Because engineering curiosity is dangerous. And because I wanted to explore: How much repeatability can be achieved with constant feed How sensitive BESS-scale readings are to motion speed Whether full force curves reveal more than a single peak number How blade geometry differences appear in force–travel graphs BESS remains an outstanding measurement standard. This project is simply what happens when you combine: a 3D printer frame, an ESP32, a load cell, and too much curiosity. Full dataset exports For now, this is JESS v0.3. Measured sharpness. Controlled motion. Real data.