Oil is where the two machine families truly differ.

• Black straight-stitch machines (hand-crank and treadle) love oil. The manual shows the oiling holes – small holes in the body and points around the moving parts underneath. A drop or two of clear sewing-machine oil only in each marked point, weekly with daily use, monthly with light use. Then sew on scrap until no oil marks appear on the cloth.
• Many modern electric machines are self-lubricating and need no oil from you at all – oil in the wrong place gums the works and stains fabric. Some ask for a single drop in the bobbin race occasionally. Check the manual before the oil can comes anywhere near the machine – “does my machine take oil, and where?” is a manual question, never a guess.
• Never use cooking oil, hair oil or general lubricant spray: they gum, attract dust and can ruin wiring. Sewing-machine oil only, from a sewing or hardware shop.

When anything goes wrong, work down this list in order, testing on scrap after each step. It ends most problems before step four.

1. Rethread everything: upper thread out and rethreaded with the presser foot up; bobbin out, checked, reinserted, tug-tested (see Module 4, Winding the bobbin and threading up).
2. Fresh needle, right type and size for the fabric, fully up, flat side correct.
3. Clean the bobbin area: plate off, lint out, trapped thread ends out.
4. Check the settings: stitch length and width sensible, tension near the middle, correct foot fitted (see Module 4, Stitch length, width and tension).
5. Test on a scrap sandwich of the real fabric. Still wrong? Now read the fault table below.

• Treadle extras: the treadle mechanism itself – pitman rod, band wheel, pedal pivots – takes a drop of oil at its moving joints too. Check the leather belt’s tension: it should drive without slipping; the manual shows how to shorten it at the staple.
• Hand-crank extras: a drop of oil at the crank gear per the manual. If the crank develops a click, a thread end is usually caught in the gear guard.
• Monsoon care: in humid months, run the machine a few minutes weekly even if you are not sewing, keep a few silica pouches under the cover, and wipe any bright steel with a faintly oiled cloth to hold off rust.
• Long storage: clean, oil (if the manual says), slip paper between the tension discs is not needed – just loosen nothing, cover well, and store off the floor away from damp walls.
• Left-handed? Cleaning and oiling are two-handed, unhurried jobs with no handedness at all. If the brush feels awkward around the feed dogs from the right, turn the machine a quarter-turn on the table and come at it from the side that suits you.

• Tie the brush to the machine drawer with a thread loop, like the screwdriver – lost tools end routines.
• A strip of old nada or soft cloth drawn through the tension discs (foot up) pulls out the lint that makes tension drift.
• Date your oiling. A sticky note inside the cover – “oiled 19 Oct” – beats memory, especially across two machines.
• Sew on scrap after oiling, always, until the stitching comes away clean. The first metre after oiling belongs to the scrap bag, never a client’s cloth.
• Fluffy fabrics, instant clean: after towelling, flannel or fleece, brush the race the same day; that one habit prevents half of all jams.
• Keep the first metre rule for mornings too: machines that sat for weeks get a scrap warm-up row before real work.
• Photograph the bobbin area before you open it the first time, so everything goes back exactly where it came from.
• A torch (your phone’s) aimed into the race shows trapped thread ends that daylight misses.
• Check the plate screws after cleaning – a plate sitting a hair proud catches cloth and deflects needles.
• Old machine smelling musty? Sun the cover, not the machine; direct hot sun can craze old paintwork and dry old wiring.
• Keep a “fault diary”: one line per problem and what fixed it. After a month you will know your machine’s personality better than any manual.
• Before carrying a machine anywhere, remove the needle, lower the foot on cloth, tape the hand wheel’s loose knob, and carry it by the body or base – never by the spool pin end.

Skipped stitches keep appearing.

1. Run checklist steps 1–2: full rethread, then a fresh needle of the right type, fully inserted, flat side correct.
2. Clean the bobbin race; a lint felt under the case lifts it enough to skip. Test on scrap.
3. Prevention: needles changed on schedule and the race brushed weekly. If skipping continues on every fabric after a jam, suspect timing – mechanic.

Thread bunches into a bird’s nest under the first stitches.

1. Cut the nest free gently from below, remove the cloth, and pull every thread end out of the race.
2. Rethread top (foot up) and bobbin; start again with both tails held and the take-up lever at its highest.
3. Prevention: tails held for the first three stitches, every seam (see Module 4, Your first seams: lines, corners and curves).

The needle breaks – once, then again.

1. Remove every fragment (magnet or tape helps; check the race), then ask what hit it: a pin, a pulled cloth, the wrong foot, a zip tooth?
2. Fit the right size for the work (90/14 or 100/16 for heavy layers), match foot to stitch, and sew without pulling.
3. Prevention: no pins under the foot, hands guide only, one hand-wheel stitch after any change of foot or stitch.

The fabric sits still and will not feed.

1. Check the feed-dog drop lever (machines that have one) is set to up – it gets knocked without anyone noticing.
2. Clean packed lint from around the feed dogs, check the presser foot is fully down and the stitch length is not at 0.
3. Prevention: the weekly brush, and a glance at the length dial and drop lever when sewing resumes after darning or embroidery work.

The machine is suddenly loud, grinding or stiff.

1. Stop. Unthread and open the race: a trapped thread end or needle fragment is the usual villain. Remove, brush, refit.
2. On a black machine, oil the marked points; dryness sounds like gravel. On an electric machine, do not oil on spec – clean first, and check nothing is wound around the hand-wheel shaft.
3. Prevention: never run through a new noise – stop at the first odd sound and look. Noise that survives cleaning and (manual-approved) oiling goes to the mechanic.

Stitches were fine; now the machine jams every few centimetres.

1. Take out the bobbin: is it the right bobbin, wound evenly, inserted the right way, case clicked home?
2. Clean the race fully, rethread everything, fresh needle, test on scrap.
3. Prevention: the checklist order exists for this exact moment – threading, needle, lint, settings, test.

Oil marks appear on the fabric.

1. Stop sewing good cloth. Wipe all visible points, then sew on absorbent scrap until it comes away clean.
2. Blot the stained cloth at once; dust the mark with talc or chalk powder, leave it to draw the oil, brush off, then wash per the fabric.
3. Prevention: fewer drops, only in marked points, and the scrap-metre rule after every oiling.

The electric machine hums but does not sew, or the pedal crackles.

1. Switch off and unplug. Check the obvious and safe: bobbin winder spindle still pushed to winding position? Hand-wheel knob loose? Correct both and try once.
2. If the hum, crackle, hot smell or dead pedal remains, stop. This is motor or electrical territory.
3. Prevention: none needed from you beyond clean cords and no pinched cables – this is the mechanic’s side of the line.

Mistakes

• Oiling an electric machine “to be safe” without reading the manual – gummed works and stained fabric follow.
• Blowing into the bobbin area, pushing damp lint deeper instead of brushing it out.
• Sewing on through a new noise – a two-minute thread jam, pushed through, becomes a workshop repair.
• Leaving the machine uncovered “because I’ll sew again tomorrow”. Dust does not wait.
• Opening the machine’s side plates and motor housing out of curiosity, then discovering screws left over.

Myths

• “More oil is better care.” Oil belongs in marked points, in drops. Everywhere else it gathers dust into grinding paste.
• “Old machines need a mechanic to stay alive.” A brushed, lightly oiled black machine outlives us all; the mechanic is for timing and motors, not for routine care.
• “A jammed machine is a broken machine.” Nine jams in ten are thread and lint, cleared at the table with the checklist.

1. The one-minute close-down: do the after-session routine five sessions running until it is automatic.
2. The full clean: plate off, race brushed, everything refitted, test row sewn – under ten minutes, with the manual open beside you the first time.
3. The oil answer: find in your manual the answer to “does my machine take oil, and where?”. Write it inside the cover. (Black machine owners: oil it, then earn a clean scrap metre.)
4. The staged fault: have someone mis-thread your machine or loosen the needle secretly. Find and fix it with the checklist, in order, without skipping steps.
5. The fault diary week: for one week, log every hiccup and its fix in one line each.

As a hobby: machines that are cared for get used; machines that jam get cupboarded. The one-minute close-down and the weekly brush are the whole secret of a machine that is always ready when the mood to sew arrives.

For earning: downtime is lost income. A tailor who clears jams with the checklist, keeps a fault diary, and knows the mechanic’s line loses an hour where others lose a week – and a mechanic respects (and prices) a well-kept machine differently from a neglected one.

For teaching: make the staged-fault drill a class favourite – students who have found a mis-threading forget it never. Teach the checklist as a chant: thread, needle, lint, settings, test. And teach the line: a student who knows what not to open is a safer machine owner for life.

• This whole lesson is the care routine – so here, only the calendar: daily brush-and-cover, weekly race clean (with oil for black machines in regular use), per project a fresh needle, yearly a mechanic’s service for a machine in daily professional use.
• Keep together in the drawer: brush, screwdriver, oil (if your machine takes it), spare needles, the manual, the fault diary.
• Before any service visit, note the machine’s symptoms from your diary – it makes the mechanic’s work quicker and your bill smaller.

• Do you cover the machine after every single session?
• Can you open, brush and refit your bobbin area without the manual?
• Do you know – from the manual, not a guess – whether your machine takes oil, and where?
• Can you recite the five checklist steps in order?
• Can you name the three fault families that go straight to the mechanic?
• Is there a fresh needle in the machine for your next project?

Six yeses, and your machine will repay you for years.

• Lint: the fabric fluff that packs the bobbin area and feed dogs.
• Bobbin race: the track the bobbin case or hook runs in, under the needle plate.
• Sewing-machine oil: the clear light oil made for machines – the only oil allowed.
• Self-lubricating: a machine built to need no owner oiling; the manual says so.
• Bird’s nest: the tangle of thread under the cloth at a failed seam start.
• Timing: the factory-set meeting of needle and hook – mechanic’s territory.
• Feed-dog drop: the lever that lowers the feed dogs (for darning); up for normal sewing.
• Service: the mechanic’s periodic clean, oil and adjustment of the whole machine.