Recipe Management and Program Changeover on Combined Drive-and-Remove Machines: Turning Changeover from a Setup Job into a Program Selection

At a station that both fastens and removes, what really determines changeover speed is often not the mechanism but parameter management. With the same mechanism, fastening works fine on product A but throws constant alarms on product B — in the overwhelming majority of cases the problem is not hardware but parameters that were never properly organised and recalled.

First, what "recipe" means. On a combined drive-and-remove machine a recipe usually contains several interlinked parameter groups: motion-level point coordinates and descent travel; process-level multi-stage torque and speed; inspection-level angle thresholds and anomaly conditions; and feeding-level screw counts and pick sequencing. These parameters are coupled — change to a smaller screw size, for example, and the torque ceiling, descent travel and angle threshold must all move together. Changing only one tends to cause misjudgement.

How recipes are organised directly determines usability. Three common approaches each have trade-offs. The first is "one parameter set for the whole machine": simplest to build, but essentially without changeover capability, suited to a single product in high volume. The second is "one file per product": a full parameter set per product, recalled as a group at changeover — clear logic and hard to leave something out, but the number of files balloons quickly as models multiply, requiring naming and classification discipline. The third is "modular parameters," splitting parameters into motion, process and feeding modules maintained separately, with the product file recording only how modules combine. This is most efficient for reuse but demands most from the people maintaining it.

In practice, mixed small-to-medium batch lines suit "per-product file plus limited reuse" best. Run a handful of base modules (for example torque modules banded by screw size), have product files reference them and record only the differences. That avoids file explosion while keeping the efficiency of reuse.

The second thing is the switching mechanism itself. Whether a recipe is recalled correctly depends on whether the machine knows which product is loaded. There are three common approaches: manual selection on the touchscreen; scanning a QR code or RFID on the workpiece or fixture to load automatically; or a command issued by a host system. The first is cheapest but relies on the operator not making mistakes; the second is most practical where changeover is frequent and helps with mistake-proofing; the third suits lines that already have MES, achieving "work order in, parameters in." They are not mutually exclusive — in real projects the second usually leads with the first as a fallback. For stations using small screw removal equipment, QR-based recipe loading can also be merged with fixture identification, saving a scan.

The third thing is versioning and traceability. Parameters keep changing as the process is optimised; without version records it is hard to tell whether a quality fluctuation is "the machine broke" or "someone changed the parameters." Recipe management therefore normally needs three companions: an audit trail (who, when, what changed), version rollback, and process data linked to the product batch. These three come up often in customer audits and quality traceability.

A final easily overlooked detail: when fastening and removal share a platform, their recipes are not independent. The fastening and removal parameters for one product often need to be maintained as a pair, because removal torque relates to the torque actually applied during assembly. Keeping both under one product file avoids the hidden problem of "the fastening parameters were updated but the removal ones are still the old ones." This is also why an M0.8-M2.0 screw removal solution is usually organised as product-plus-paired-drive-and-remove recipes in real projects.

Shenzhen Honred Technology provides non-standard custom solutions for automatic screw driving and combined drive-and-remove equipment. Its machines support multiple recipe management and drive/remove program switching; combined with an automatic vision screw removal machine module offering torque monitoring and vision alignment, this helps a line move changeover from dependence on a veteran technician's setup skill to a reusable, traceable program selection.