• Both faces parallel — sensor pads on top, anti-slip pads underneath, 0.01 mm parallelism. Flipping the part onto setting blocks lets parallelism drift with the blocks and chips, so we locate on a datum edge plus vacuum chuck.
• Sensor face flatness — six-axis force sensors are extremely sensitive to mounting face flatness; only within 0.01 mm can all four corners load evenly. Once the face warps, walking force signals pick up a DC offset.
• Anodizing film thickness — 25-40 µm of hard anodizing raises the sensor mounting face and leaves the four corners non-coplanar. We mask the sensor face and anti-slip pad grooves and re-check flatness after anodizing.
• Impact Resistance and Light Weighting — landing impact goes straight into the sole plate; 7075-T6 specific strength allows 6 mm plate that carries several times body weight, while weight-relief pockets are cut in unloaded zones.

Foot structure is tightly coupled to gait strategy, so sole plates are almost always custom.

• Sensor Compatibility — 6-axis force, single-axis force or thin-film pressure mapping; cavities, holes and cable notches are cut to the model.
• Zone-Specific Customization — toe, sole and heel zones, flexure hinge slots and anti-slip pad layout designed around the gait.
• Material Selection — 7075 for weight, 6061 for cost, titanium for impact and corrosion resistance, with a weight-cost comparison provided.
• Integrated Machining — ankle mounting bosses and cable channels can be machined into the same part, reducing your assembly part count.

The drawings of a complete humanoid robot are often the core competitiveness of the next machine generation. We apply both physical and data isolation on a per-project basis.

• NDA First — mutual NDA and non-circumvention agreement signed before drawings are received.
• Isolated Secure Area — dedicated machines and staff, no photography and no phones inside the area.
• Not displayed — drawings, part photos and customer logos never enter sample cabinets, catalogs, the website or social media.
• Data Isolation — programs and models sit on an access-controlled server, destroyed at project end with a written record.
• Code-named — traveler cards and packaging labels use internal codes instead of customer part numbers.

Dongguan Changxinda Precision Technology Co., Ltd.Founded in 2008, with a team of 90-102 staff, serving 200+ Customers, export share 50-60%, annual sales of USD 10-20 million, ISO 9001:2015 certified.

For plate parts the craft lies in the flip: how the datum is carried over, how the fixture holds, and which step stress relief sits at, decide whether the part lands at 0.01 mm or 0.04 mm. We write these into work instructions instead of relying on one operator's feel.

• Reserved Capacity — machine time is locked weekly for volume programs, so rush orders never displace batch schedules.
• Two shifts, six days a week — production runs 07:30-22:00, with weekend shifts added in peak season.
• Buffer Stock — semi-finished stock is held for repeat specifications, cutting repeat order lead time by about 30%.
• Visible Progress — weekly progress sheet plus shop floor photos, tracking number issued at shipment.
• Shipping — samples by express in 3-5 days, volume by air or sea, EXW / FOB Shenzhen / CIF.