缝纫机真机套件：意向登记Sewing-machine kits: register your interest
《缝纫机设计与制造》在网上有虚拟样机和虚拟实验；我们也在准备价格不高的真机，让你在真机上把虚拟实验里调过的再调一遍。现在还没有开卖，请告诉我们你想要哪种、能接受什么价位，我们据此决定是否备货、备多少。登记不是订单，不用付款。The course Sewing Machine Design and Manufacturing comes with a virtual machine and virtual labs online. We are also preparing low-cost physical machines, so you can repeat on real hardware what you tuned in the virtual labs. They are not on sale yet: tell us which kit you would want and what price you would accept, and we will decide whether, and how many, to stock. Registering is not an order and costs nothing.
四种套件Four kits
A · 机头拆装套件A · Machine-head kit不带电机的工业平缝机头、手轮、工具、量具，《拆装与调机手册》。标配透明盖板（聚碳酸酯），零件编号与虚拟样机一致。Industrial lockstitch head without motor, hand wheel, tools and gauges, an assembly and adjustment manual. Clear polycarbonate covers as standard; part numbers match the virtual machine.
A+ · 开窗剖切展示机A+ · Cut-away display machine在 A 的基础上，机壳避开受力部位开窗、嵌透明板，整条传动链看得见。少量制作，适合实训室展示。Kit A with windows cut into the housing away from load-bearing areas and glazed, so the whole drive train is visible. Made in small numbers for training rooms.
B · 整机B · Complete machine机头、伺服电机、台板。先在国内供应；美国要先核实电压和安全认证。Head, servo motor and table. China first; for the US, voltage and safety certification are being checked.
C · 控制套件C · Control kit伺服电机、控制板、传感器，对应课程第 19–22 讲的电控原型平台；可装到 A 上做自己的控制器。Servo motor, controller board and sensors for the control-prototype platform of lessons 19–22; fits kit A to build your own controller.
机械安全：透明盖板照样是防护件；套件不会为了看得见而去掉任何防护。机针、皮带、旋梭处有夹伤和刺伤风险，手册首页有安全说明。Safety: the clear covers are guards like the originals; no guard is removed for visibility. Needle, belt and hook can pinch or puncture; the manual opens with safety instructions.
登记Register