A Mistake in the Third Setup Costs More Than the Part: How Heinrich Wagner Sinto Moved Risk from the Machine to Simulation

From the outside, multi-setup machining looks straightforward: clamp the part, machine one side, re-clamp, machine the next. In reality, risk accumulates with every setup:

• In one orientation the toolpath runs safely; in the next, accessibility is already borderline.
• Stock allowance has to be left in the right place and in the right amount, otherwise finishing turns into manual handwork.
• Stepover and finishing parameters on freeform 3D surfaces can look “almost good” — and that “almost” later costs hours.
• A small mistake in operation logic often does not show up immediately — only after material has been removed and you can’t go back.

The most dangerous scenario is a late discovery — after re-clamping or close to the final stage. Fixing it is not a couple of clicks. It’s machine time, setup time, and sometimes a scrapped part.

That was the point where HWS decided to change the approach. Before ENCY, the plant had been running a previous-generation CAM system for many years and handled its work reliably. But requirements kept rising — programming speed, process control, repeatability, and surface quality on complex 3D shapes and in multi-setup machining.

Eventually it became obvious: the old level of performance and functionality was no longer enough to keep pace without extra iterations and without “catch-up” edits at the machine — where mistakes cost the most. That’s why they moved to ENCY.

People often talk about simulation in general terms. At HWS, it plays a very practical role: find the problem before it becomes expensive.

The point is not to watch a nice-looking tool motion. The point is to answer hard questions before cutting metal:

• Do we actually have access to every area in each setup?
• Where does the toolpath become risky because of orientation or tool length?
• Are we creating a “blind zone” that will later need manual correction?
• Could the setup-to-setup sequence hide an issue that will only appear at the end?

In multi-setup machining, that’s the key to predictability: catch risks on the screen, not at the machine.

5-Axis Machining on a DMU 80. On a 5-axis DMU 80, multi-setup parts are a classic high-risk area. If something is missed during preparation, the problem tends to show up after re-clamping: accessibility changes, the surface “drifts,” stock is not where you expected it. In simulation, this can be seen early — before the part ever reaches the machine table.

“Tower” Fixturing. A tower-style fixture solves access to certain surfaces, but also makes the process more sensitive: the tool runs closer to limits, the risk of dangerous close passes is higher, and the cost of a collision is huge. That’s why pre-checking toolpaths and operation logic is critical for jobs like these.

Turn-Mill Parts. When turning and milling operations are combined in one part (a typical example is a gear-type component), the operation chain has to converge into one result — geometry, fits, and surface finish. Any preparation error shows up as a mismatch at the final stage — exactly where corrections are most expensive.

HWS describes the outcome in production terms:

• Programming and setup time went down. Less time “around the machine”: fewer extra checks and repeat setups, more actual cutting.
• Accuracy and repeatability improved. On complex parts, repeatable output makes production calmer and scheduling realistic.
• Scrap dropped noticeably. When risks are caught earlier, fewer parts are lost because of late-discovered issues.
• Surface quality improved. Especially on freeform 3D surfaces and in multi-setup machining, where surface problems often come from preparation, not from the machine itself.

In other words, they reduced not just “time in CAM,” but time and risk around the machine.

Datentechnik Reitz supports ENCY in the DACH region and participates in the development of ENCY components with access to the source code. In practice, that means support is not just a hotline — it’s the ability to resolve implementation and production issues faster and to keep the team current through training on new functions.