How a Camless Spring Machine Can Cut Your Setup Time by 50%

If you have spent a full morning dialing in cams, calculating lead angles, and grinding tooling on a traditional cam spring machine, you already know the hidden cost of that workflow. Setup time is the silent margin killer in any spring production shop, and the more complex the part, the more it eats into your day. After two decades of building CNC spring machines and watching them run in factories across Vietnam, Brazil, Indonesia, and Korea, I want to walk through what actually changes when a shop switches to a camless wire bending machine, and where the savings really come from.

The Real Cost of Cam-Based Tooling

On a cam spring machine, every new part requires a physical cam to be designed, machined, and installed. For a simple compression spring that might be 30 minutes. For a torsion spring with a custom leg angle or a wire bending part with two planes, it can stretch into half a day or more. Multiply that across 200 part numbers per year and you are looking at weeks of non-productive machine time.

A camless spring machine replaces the mechanical cam with software-driven axis coordination. When the part changes, the operator types new coordinates into the HMI. No cam grinding, no tool indexing, no re-measuring of mechanical stops. That is the headline benefit, but it is not the only one.

What Actually Gets Faster

Here is where the 50% number comes from. Setup time on a camless machine drops because five separate bottlenecks disappear at once:

• Cam design and machining: replaced by on-screen parameter entry, roughly 1-3 minutes

• Tool change for new wire diameter: pre-calibrated tool holders cut changeover to under 2 minutes

• Pitch and diameter adjustments: electronic, no shim stacking, about 30 seconds

• Trial samples and fine-tuning: closed-loop servo feedback converges in 2-3 iterations instead of 8-10

• Documentation: programs save to USB or network, ready for the next order

When you stack these savings, a job that took 4 hours to set up on a cam machine typically runs in 1.5-2 hours on a camless machine. That is the 50% figure, and it holds up across our customer base.

Where Cam Machines Still Win

I want to be fair here. Cam spring machines are not obsolete. For ultra-high-volume production of the same part running 24/7, a well-tuned cam machine can hit cycle times that a camless machine struggles to match. The mechanical cam does not need to "calculate" the next move on every cycle. If your shop runs one part number in millions, a CNC cam spring machine like the HSM-CNC20 is still the right call.

The decision really comes down to part mix and changeover frequency. High-mix, low-to-medium volume is where camless wins decisively.

HSM-CNC Camless Series at a Glance

Since 2004 we have built both cam and camless platforms, so the comparison comes from real production data, not marketing. The camless series covers wire diameters from 0.1mm micro-springs up to 4.5mm heavy-duty torsion springs.

Model	Wire Diameter (mm)	Best For	Key Feature
HSM-CNC1008	0.1 - 1.0	Micro-springs, electronics, medical	Ultra-fine wire stability
HSM-CNC1025	0.2 - 2.5	General precision springs, wire forms	All-in-one versatility
HSM-CNC1045	1.8 - 4.5	Heavy torsion, automotive wire forms	Wire rotatory axis included

The HSM-CNC1045 is worth highlighting because it is one of the few camless machines in this wire range that includes a wire rotatory axis as standard. For automotive seat frame wire bending or large garage door torsion springs, that axis makes complex 3D forms possible without secondary operations.

A Real Shop Floor Comparison

A customer in Vietnam had been running cam machines for years. In early 2026 they were evaluating whether to add a camless unit. They ran the same 8-part batch on both platforms over a week.

Metric	Cam Machine (HSM-CNC20)	Camless Machine (HSM-CNC1025)
Average setup time per part	42 min	18 min
Time to first good piece	55 min	22 min
Setup time saved over 8 parts	Baseline	192 minutes (~3.2 hours)
Operator skill required	High	Medium

The camless machine did not just save time. It made the result less dependent on which operator was on shift. That is a quiet but meaningful gain for any factory dealing with labor turnover.

The Hidden Second Savings: Repeat Orders

One detail that rarely shows up in a spec sheet but shows up clearly in P&L: when a repeat order comes in six months later, a camless machine recalls the program from memory and runs first-good-piece within minutes. A cam machine often has to be re-setup because someone changed a cam during a previous rush job and never put it back.

For shops serving automotive or electronics customers with scheduled re-orders, this repeat-order recovery is where camless machines compound their advantage year after year.

What About the Investment?

Camless machines carry a higher upfront cost, typically 20-40% above a comparable cam machine with the same wire capacity. The payback calculation depends on your setup frequency. A useful rule of thumb from our customer data: if you change part numbers more than 3 times per week on average, the camless machine pays back the premium within 12-18 months through setup labor savings alone. If you run the same part for months on end, stick with cam.

Where We Are After 20 Years

Dongzheng has delivered more than 150 sets of CNC spring machines outside China since 2004, with the HSM-CNC20 alone accounting for over 100 units still running in factories. The global split looks like this: 40+ units in Vietnam, 10+ in Brazil, and 5+ each in Indonesia and Korea. We see both platforms running side by side in many of these shops, and the operators usually know which jobs to send to which machine without being told.

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