Running a Production Machine: Startup to Shift Handoff
Do a pre-shift check, read a traveler, run the job, keep your records, clean up, and hand off to the next shift.
Table of contents
A production machine runs well when the operator runs a good routine. Most scrap, most downtime, and many injuries trace back to something skipped: a note not read, a guard not checked, a revision not compared. Here is a whole shift in order, so that the routine becomes a habit. Your plant's procedures and the machine's manual come first wherever they differ from what is here.
What You Will Be Able to Do
- Use pass-down notes to find out what happened before you arrived.
- Do a pre-operation inspection and test the E-stop, and know what to do if it fails.
- Read a run sheet or traveler and spot a problem before you make parts.
- Load stock safely, run the cycle, and make in-process checks.
- Keep honest records, clean up chips the right way, and leave a useful handoff.
Get Ready to Work
Dress for the machine before you reach it. Tie back long hair. Take off rings, watches, and necklaces. Fasten loose sleeves. A rotating part can catch loose clothing, jewelry, or a glove and pull you in before you can let go, and that can mean a severe injury or death. Wear gloves for handling sharp stock, and take them off near anything that rotates unless your procedure says otherwise.
Read the Pass-Down Notes First
Pass-down notes are the message from the last operator. They tell you how the machine has been running, what shape the tooling is in, what quality problems came up, and what safety concerns are open. Without them you start blind, and you may repeat a problem the last shift already solved.
Read the log before you touch the machine. If the other operator is still there, talk for two minutes and ask what is not in the notes.
Do the Pre-Operation Inspection
Check the machine before you start it, every shift, even if it was running when you arrived. Walk around it with the machine stopped, then test the E-stop.
| Check | What to look for | If it fails |
|---|---|---|
| Guards | In place, secure, no missing fasteners | Do not run. Report it |
| E-stop | Stops the machine and has not been damaged | Do not run. Tag it out |
| Fluid levels | Oil, coolant, and lube within marks. Normal color | Report it. Fill only if you are trained to |
| Air pressure | Gauge within range, no hissing | Report it |
| Leaks and condition | No fresh oil, loose parts, or frayed cords | Report it |
| Tooling | Sharp, tight, and the right tool for the job | Tell the setup tech |
| Gauges | Right gauge, in calibration, clean | Get a good one |
| Floor and area | Clear of chips, oil, and clutter | Clean it up |
Guards protect you from the machine's moving parts, and they stay on whenever it runs. Only maintenance removes them, with lockout in place. OSHA's machine guarding rule, 29 CFR 1910.212, requires that protection, so taping over a light curtain, jumping out an interlock, or blocking a two-hand control is never allowed.
Test the E-Stop
Test it the way your procedure says. A common method is:
- Make sure no one is in the danger zone.
- Start the machine, or set it to idle, as the procedure directs.
- Press the E-stop. All motion should stop, and the machine should not restart.
- Try the normal start. It should do nothing while the E-stop is pressed in.
- Release and reset it, then confirm that the machine needs a deliberate start.
- Repeat for every E-stop on the machine, and record the test.
If the E-Stop Fails
Do not run the machine. A dead E-stop means you have no way out in an emergency.
- Shut the machine down.
- Tag it out of service so no one else starts it.
- Tell your supervisor and maintenance right away.
- Note it in the log.
- Stay off the machine until it has been repaired and retested.
Warning: A broken E-stop is not something to work around for the rest of the shift. No production target allows you to run a machine without one.
Read the Run Sheet or Traveler
A run sheet tells you how to run the job. A traveler is the paperwork that follows the parts from one operation to the next and collects signatures on the way. Many plants use one form for both.
| Field | What it tells you | What to check |
|---|---|---|
| Part number and revision | Exactly which part, and which version | Matches the print and program |
| Quantity | How many good parts to make | Allow for your scrap count |
| Material | What the stock must be | Matches the tag on the stock |
| Operations | The steps and their order | Earlier steps are signed off |
| Machine settings | Speeds, pressures, temperatures, program | Match what is loaded |
| Tooling | Which tools, dies, or fixtures | Right ones are installed |
| Inspection requirements | What to measure and how often | You have the gauges |
| Special instructions | Handling, packaging, customer notes | You understand them |
| Signoffs | Who did and checked each step | Add yours when you finish |
Compare the paperwork before you run, not after. Suppose the traveler calls for revision D and the print at your station says revision C. Stop and ask. Those two revisions could differ by one hole, and you would not find out until a whole batch was scrap.
Load Stock Safely
Careful loading protects you, protects the machine, and keeps the workpiece secure. A bar that shifts in a chuck or a blank that sits crooked in a die can break tooling or be thrown from the machine.
- Check the material tag against the traveler.
- Look over the stock for damage, rust, bends, and burrs.
- Plan the lift. Use a hoist or get help for heavy stock, and watch for sharp edges.
- Load it the way the setup sheet shows, and seat it fully against the locators.
- Clamp it and confirm that it cannot move.
- Keep your hands clear of pinch points as clamps close, and remove any loose tools.
Run the Cycle
Production follows a loop: load, start, watch, unload, check, log.
Before the run, the first piece is checked against every print dimension. That first-piece check proves the setup is right before you make the rest of the lot. Do not run on until it has passed and been signed off.
Know your cycle time, which is the time from the start of one cycle to the start of the next. If it is 42 seconds, you can make about 3,600 / 42 = 85 parts an hour, so a 1,200-piece job takes about 14 hours of run time. That tells you whether the job will finish on your shift. If the cycle starts running longer, something has changed.
Stay alert during the run. Use two-hand controls as they are meant to be used, with both hands, and never block one down. Unload parts carefully so they do not nick each other. Keep good parts, scrap, and rework in their own marked bins.
Make In-Process Checks
The control plan or traveler says what to measure and how often, such as every 50 parts or every hour. Measure on schedule, and record the real number, not just "OK".
| Result | What to do |
|---|---|
| In spec and steady | Keep running |
| In spec but moving toward a limit | Tell your lead or setup tech now |
| Out of spec | Stop, hold the parts, and tell your lead |
When a part fails, every part since your last good check is suspect. Say you check every 50 parts. Part 250 passed, and part 300 failed. Hold parts 251 through 300, all 50 of them, tag them, and keep them apart from good stock until someone has sorted them.
Keep Your Records
Your records tell the plant what actually happened. Most plants want:
- Good parts, scrap, and rework counts
- Downtime, with the time and reason
- In-process check results
- Tool changes and adjustments
- Anything unusual
Write things down when they happen. Numbers filled in at the end of the shift are guesses. Report scrap honestly, because a hidden problem repeats. If you make a mistake on paper, fix it the way your quality system says, usually with one line through the entry, plus your initials and the date.
Clean Up Chips
Clean with the machine stopped, and use a brush, a chip rake, or the chip conveyor. Use a hook for long, stringy chips, because they are sharp and hold on. Never clear chips with your bare hands.
Do not blow chips off with compressed air. Air throws chips at your eyes and at people nearby, and drives them into way covers, bearings, and electrical parts. Some plants allow air for certain cleaning. Where they do, OSHA 29 CFR 1910.242(b) says the air must be reduced to under 30 psi, with effective chip guarding and PPE. Never blow chips or dust off your own body or clothes.
Warning: If cleaning means removing a guard or reaching into the danger zone, it is servicing, not housekeeping. Lock out the machine first.
End the Shift
- Finish the cycle, and leave the machine in the state your procedure calls for.
- Finish your counts, and sign the traveler for the work you completed.
- Stage parts in the right place, with tags on anything on hold.
- Clean the machine and the area, and put tools and gauges back.
- Write your pass-down notes.
- Talk to the next operator if you can.
Write Pass-Down Notes Worth Reading
Good notes give facts that the next person can act on.
| Topic | Weak note | Useful note |
|---|---|---|
| Running condition | Ran OK | Running 42 seconds, no stops since 1 p.m. |
| Tooling status | Changed insert | New insert at part 640, next change near part 900 |
| Quality issues | Some scrap | Bore running near high limit since 2 p.m., setup tech told |
| Safety concerns | Blank | Oil on floor by chip bin, cleaned, repair ticket open |
Common Mistakes
| Mistake | What it costs |
|---|---|
| Skipping the pass-down notes | Repeating a problem the last shift found |
| Assuming the last shift checked the machine | Running with a missing guard or a dead E-stop |
| Not comparing the revision | A full batch of the wrong part |
| Writing "OK" instead of the reading | No way to see a trend |
| Filling in records at the end of the shift | Records no one can trust |
| Blowing chips off with an air gun | Eye injuries and damaged machine parts |
Check Your Understanding
1. You arrive and the machine is already running. The last operator is leaving and says it is good to go. Can you skip your inspection?
No. Read the notes, then do your own check. You are the one relying on those guards and that E-stop for the next eight hours.
2. You press the E-stop during your check, and the spindle keeps turning. Your lead says you have a hot order. What do you do?
Do not run it. Stop the machine by normal means, tag it out of service, and tell your supervisor and maintenance. It stays off until it is repaired.
3. The material tag says 6061 aluminum, and the traveler says 7075. They look the same. What do you do?
Stop and ask before loading. Wrong material may not show until the part fails in use. Do not assume either document is right.
4. You check every 25 parts. Part 175 passed and part 200 is out of spec. How many parts do you hold?
Parts 176 through 200, which is 25 parts. Stop, tag them, and tell your lead.
5. Your coworker uses an air nozzle to blow chips out of a fixture while someone is walking past. What is wrong?
The air throws chips at people and into the machine. Use a brush or rake instead. If air is allowed at all, it must be under 30 psi with chip guarding and PPE.
Key Takeaways
- Read the pass-down notes first, and do your own inspection every shift.
- Guards stay on, and a failed E-stop means tag it out, report it, and do not run.
- Compare the traveler, print, material, and program before making parts.
- Measure on schedule, record real numbers, and hold everything back to the last good check.
- Clean chips with a brush, rake, or conveyor, not by blowing them.
- Leave notes that give the next person facts about running condition, tooling, quality, and safety.