Contract machining: tools changed by count, jobs planned on paper

Tools are changed by count, not by wear

What happens. A tool is swapped after a fixed number of parts or minutes, because that is the rule that has not failed yet. Some tools are thrown away with life left; others break early on a hard batch of material and take the part with them. The spindle load and the sound of the cut say a lot, but nobody has time to watch them.

What it costs. Tool cost on one side, scrapped parts and machine stops on the other. In a job shop every material and every lot is a little different, so a fixed count is always wrong in one direction.

Why the usual fix fails. A shorter interval is safe but expensive. A wear sensor on every machine is costly and hard to retrofit. Operators who change by feel do it well, but the knowledge sits in a few heads and does not carry over to the night shift.

How a fixed-price remote diagnosis checks it. From the signals your machines already record (spindle load, feed, vibration if logged, tool-change times, scrap records) I look at whether wear leaves a readable trace and whether it can be estimated early enough to act on. The fixed-price remote diagnosis tells you whether a computed wear value can replace the counter, and what data you would need to add.

Jobs are planned on paper and machines stand idle

What happens. The week is planned on a whiteboard or in a sheet. When a rush job arrives, a tool is missing or a setup runs long, the plan is redone by hand, and some machines wait while others are overloaded.

What it costs. Idle machine hours, late deliveries and overtime. Setups that could be grouped are done twice because nobody saw it in time.

Why the usual fix fails. A planning module from the enterprise software rarely knows the real setup times, tool availability or which machine can take which job. So the planner overrides it, and the paper plan returns.

How a fixed-price remote diagnosis checks it. From your order list, routings, machine logs and past setup times I check how much of the idle time is caused by the sequence and how much by missing tools or material. The fixed-price remote diagnosis answers whether a schedule optimiser would beat your current planning on your own jobs, and what inputs it needs.

Background: Optimal paths, schedules and setpoint plans

Old machine controls and no documentation

What happens. The machine is mechanically sound and earns money, but its control is decades old. The circuit diagrams are incomplete, the programmer has retired, and spare parts for the control are found on auction sites.

What it costs. A single failure can stop a machine for weeks, and nobody can say how long. Modifications are avoided because nobody dares touch the control.

Why the usual fix fails. A full replacement by the machine maker is expensive and means long downtime. A like-for-like swap of parts keeps the old limits and the missing documentation.

How a fixed-price remote diagnosis checks it. From photos of the cabinet, the drawings you have, the signal list and a description of how the machine is used, I judge what the control must do, where the risk sits and what a documented new concept would look like. The fixed-price remote diagnosis gives you a basis for deciding between repair, partial retrofit and replacement.