Chen Hao placed the recorder on the control panel and tapped the small print "Shunliu, don't throw a tantrum tomorrow" twice. Without looking at it much, he turned and walked to the control box, hovering his hand above the start button for two seconds, as if making a bet with himself.
“If it breaks again this time,” he said, “I’ll have a shaman perform a ritual for it.”
Nana's projector rose from the terminal, and as soon as half of the screen lit up, he pressed the button.
With a soft hum, the motor started to turn slowly, the belt tightened, and the main shaft began to rotate. The guide rollers started simultaneously, drawing the raw fiber into the first stretching zone. For the first few seconds, everything was incredibly smooth; the yarn slid out along the guide groove, fine and even, gleaming faintly under the light.
"Huh?" Chen Hao's eyes widened. "They actually listen to me?"
The yarn continued to be output for ten seconds, twenty seconds, thirty seconds... He couldn't help but grin and turn to look at Nana: "See, I told you it recognized its owner, didn't I?"
Before the words were even finished, *smack!*
The first thread snapped, like a rubber band stretched to its limit and bursting. Then came the second, the third, three snaps in quick succession. All the fibers at the spindle broke, the broken ends swaying gently in the airflow, like a group of workers given a holiday but not knowing where to go.
Chen Hao's smile froze for half a second before slowly disappearing.
"...Perhaps it was just a polite gesture."
Nana has already accessed the data stream. "The spindle speed fluctuates within ±8%, and the tension sensor shows that the peak pressure in the traction section deviates from the set value by 31%. The feeding and traction rhythms are out of sync, causing the fibers to be subjected to repeated stretching, which leads to structural fatigue and fracture."
"Speak like a human." Chen Hao grabbed a handful of broken wire, examined it closely, and said, "It's just that it was spun too wildly and pulled too hard, and the wire couldn't hold up?"
"Mostly correct."
"Can we slow down a bit? Be gentle, don't sprint right from the start."
"You can try reducing the speed and observe the critical stable range."
Chen Hao turned the inverter knob, adjusting the speed from 400 revolutions per minute to 350. He then restarted the feeder.
This time, the yarn held for seventeen seconds before breaking. The break was cleaner than before, but still not ideal.
“There has been progress,” he said. “At least it has changed from sudden death to death from illness.”
In the third test, the rotation speed was reduced to 300 and the tension level was lowered by one level. The yarn running time was extended to 43 seconds, during which only one slight vibration occurred.
“There’s potential.” Chen Hao drew a line on the record board. “Looks like this thing is slow-paced; we’ll have to coax it.”
Nana updated the control program, adding a small feedback adjustment module. "The motor response curve has been optimized to reduce start-stop shock. It is recommended that the next test maintain the current tension and gradually increase the speed to find the optimal balance point."
"Are you trying to make it learn to walk before it learns to run?"
"The analogy is appropriate."
In the fourth test, the speed was increased to 320, and the yarn broke after running for one minute and seven seconds. In the fifth test, at 310, it ran for one minute and forty-nine seconds, and the break was almost flush.
"It'll be soon." Chen Hao rubbed his hands together. "It's already starting to consider a long-term relationship."
The sixth time, they changed the batch of fiber raw materials and adjusted the preheating temperature. The yarn ran smoothly for two minutes and thirteen seconds until a knot got stuck in the guide roller, causing localized stress concentration and breaking.
“It’s not a system problem,” Nana confirmed after scanning. “It’s a chain reaction triggered by defective raw materials.”
"Goodness, it's picky about food?" Chen Hao pinched out the nodule, looked at it in his palm, and said, "I'll have to open a canteen for it later, specializing in fine rice and flour."
Before the seventh test, Chen Hao carefully checked all the feeding channels to ensure there were no residual impurities. He took a deep breath and, as if preparing to shoot a game-winning shot, pressed the start button.
The spinning wheel ran smoothly, continuously outputting yarn for more than two and a half minutes without any noticeable shaking or sudden tension changes. Chen Hao stood in front of the control panel, his hands resting on the edge of the control box, his eyes fixed intently on the yarn outlet.
"This time... is it really going to work?"
Before he could finish speaking, the yarn shuddered violently just as it was about to enter the winding zone, and then broke.
He paused for two seconds, glanced down at the notepad, and silently turned the page.
"Yes, we're still in the long-distance relationship stage."
“Data shows that the current parameter combination is close to the optimal one.” Nana pulled up a comparison chart. “The speed and tension matching degree has been improved by 62%. The fracture is mainly caused by the inertial lag of the end winding mechanism, which leads to instantaneous overload.”
"So it was almost at the finish line, but it tripped over its own tail?"
"The logic holds true."
“Then let’s change the tail.” Chen Hao rolled up his sleeves. “Let’s add the winding speed into the feedback loop so it knows when to stop.”
He opened the control panel and manually added a new sensor input interface. Nana simultaneously generated new control logic and embedded it into the existing program.
"The new scheme has been loaded," she said. "It is recommended that dynamic speed adjustment mode be enabled in the eighth test."
"Come on." Chen Hao loaded a new batch of fibers onto the feeding rack. "If this still doesn't work, I'll declare it a permanently single device, banned from dating for life."
The eighth startup.
The motor hums softly, the main shaft rotates at a constant speed, and the yarn is smoothly drawn out. After stretching, guiding, and traction, it finally enters the winding area. The drum increases speed synchronously, seamlessly connecting the traction speed, and the entire path flows smoothly like a stream.
Time passed second by second.
Forty seconds – No abnormalities.
One minute later—still stable.
One and a half minutes—Chen Hao subconsciously held his breath.
Two minutes later—he quietly reached out and touched the flywheel casing; the temperature was normal.
Two minutes and thirty seconds—the yarn is still being produced, and its length has exceeded fifty meters.
"This time..." he said softly, "will it really work?"
Nana watched the real-time data. "Tension fluctuations have converged to within 5%, rotational speed deviation is less than 2%, and winding synchronization error is negligible. If the current state is maintained, it is expected to run continuously for more than fifteen minutes."
Chen Hao grinned, about to speak, when suddenly his brows furrowed.
"etc."
He leaned closer to the wire outlet, squinting as he examined it closely. "Over there, near the guide roller, isn't something wrong?"
Nana immediately zoomed in on the optical monitoring screen. At the high-speed camera frame rate, a tiny fiber briefly lingered the moment it detached from the guide roller, before being forcibly straightened by the subsequent yarn.
“Slight adhesion was observed,” she reported. “The coefficient of friction is slightly higher than the standard value, which may lead to localized stress accumulation.”
"So, things look good on the surface, but underneath things are actually starting to heat up?"
"There are potential risks."
"Then what's the point of trying?" Chen Hao let go of the recorder in his hand, turned around and opened the tool cabinet. "Hurry up and treat the surface of the guide roller, otherwise it will explode sooner or later."
He pulled out a piece of ultrafine abrasive cloth and a bottle of lubricant. "Didn't we say last time that this material is susceptible to oil contamination?"
"A new type of nano-coated lubricant, non-residual, suitable for high-cleanliness spinning environments." Nana handed over a bottle of clear liquid. "Two drops are enough."
Chen Hao did as instructed, gently wiping the surface of the guide roller with careful movements, as if he were grooming a cat.
"Your technique is quite skilled," he said as he wiped her hands. "Have you ever worked in the beauty industry before?"
"I have no such experience."
"Then how do you know so much?"
"The knowledge base contains more than 12,700 industrial maintenance cases."
"No wonder he's better at managing his finances than me." He finished wiping the last circle, blew on it, and said, "Alright, the ninth round, the ultimate test."
He returned to the control panel, his finger hovering over the start button, and paused.
“If there’s another problem this time,” he said, “I won’t blame it, I’ll blame myself.”
The button is pressed.
The motor started up again, and the spinning wheel slowly accelerated. The yarn began to be output again, and the treated guide rollers slid smoothly, with almost no resistance as the fibers glided through.
Thirty seconds – steady.
One minute later—still the same.
One and a half minutes later, Chen Hao removed his hand from the button and gently placed it on the edge of the control box.
Two minutes later—he looked up at Nana.
The curves on her screen were as smooth as a mirror.
"No abnormalities are currently observed," she said. "Continued observation is recommended."
Chen Hao nodded, about to speak, when he suddenly noticed a wavy line in the corner of the screen jump slightly.
He squinted.
"Is...it happening again?"
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