1. Daily Electrical Safety Checks

Operators should perform these checks at the start of every shift:

✔ Inspect Emergency Stops

• Ensure all E-Stops are functional

• Make sure none are jammed or loose

• Confirm machine does NOT start unless all E-Stops are reset

✔ Visual Check of Electrical Panel

• Door is closed and properly locked

• No warning lights active

• No unusual noises from inside (buzzing, arcing)

• No burning smell or overheating

✔ Cable and Sensor Inspection

• Look for damaged, loose, or pinched cables

• Ensure sensor LEDs are active and stable

• Check for oil, dust, or debris covering lenses

✔ Grounding and Machine Frame Check

• No loose bolts on grounding straps

• No signs of metal-to-metal arcing

✔ Control Voltage Stability

Operators can quickly check:

• HMI screen flicker

• Random resets

• Slow responsiveness
  These indicate control voltage problems.

2. Weekly Electrical Checks (Technician or Supervisor)

Once per week, supervisors or maintenance staff should perform a more detailed inspection.

✔ Terminal Tightness

Vibration loosens terminals over time — a major cause of:

• Random stops

• Sensor failures

• VFD faults

Tighten terminals inside:

• Control panel

• Solenoids

• Sensors

• Motor junction boxes

✔ Sensor Alignment

Verify:

• Proximity sensors still detect targets properly

• Photoelectric sensors are clean & aligned

• Encoder wheel/coupling is tight

✔ Check for Electrical Noise

Common symptoms:

• Flickering sensors

• Wrong length readings

• Erratic servo/VFD behavior

Inspect grounding connections and cable shielding.

✔ Inspect VFD/Drive Cooling

• Fans functioning

• Vents not blocked

• Heat sinks clean

Overheating drives = production downtime.

3. Emergency Stop Verification

E-Stops must be fully functional, dual-channel, and compliant with modern safety standards.

Operators must confirm:

• Pressing ANY E-Stop immediately stops the machine

• Machine cannot restart until every E-Stop is manually reset

• No bypasses or taped-over interlocks exist

• Guard doors stop the machine when opened

Weekly tests should include:

• Safety relay operation check

• Dual-channel feedback testing

• Guard switch alignment

• Reset circuit testing

Machine Matcher recommends documenting all tests in a safety log.

4. Cable Condition & Routing Checks

Damaged cables are one of the most common causes of electrical accidents.

Operators must inspect for:

• Frayed insulation

• Exposed copper

• Pinched cable runs

• Cables touching sharp edges

• Oil/grease contamination

• Burn marks or melting

• Loose connectors

Special attention areas:

• Drag chains

• Encoder cables

• Sensor runs

• Solenoid wiring

• Motor junctions

Damaged cables can cause shocks, fires, and machine shutdowns.

5. Panel Lockout Procedure (LOTO)

Only trained personnel should open the electrical cabinet.

Basic lockout/tagout steps:

1. Stop the machine

2. Power OFF at main disconnect

3. Apply lock and tag

4. Verify power with meter

5. Discharge capacitors (especially VFDs)

6. Begin work ONLY after verification

After maintenance:

• Remove tools

• Reinstall covers

• Restore power

• Reset faults

• Perform safety test run

LOTO prevents accidental startup and serious injuries.

6. Testing Sensors (Daily/Weekly)

Sensors directly affect cut length, punching accuracy, and machine safety.

Daily operator tests:

• Encoder pulse LED active

• Material entry sensor working

• Cut/shear home sensor reading

• Safety gates showing correct status

Weekly maintenance tests:

• Test all PLC inputs using monitor mode

• Clean lenses & brackets

• Tighten mounting hardware

• Verify sensor switching distance

• Check for low 24V supply issues

Sensors must respond instantly and reliably — any delay affects quality and safety.

7. Best Practices for Electrical Safety

✔ Keep panel doors shut at all times

Open panels draw dust, moisture, and damage sensitive components.

✔ Never bypass safety devices

No tape, magnets, wire loops, or temporary jumpers.

✔ Do not reset a fault repeatedly

Repeated resets mask dangerous problems.

✔ Report overheating immediately

Warm or noisy panels indicate risk.

✔ Keep liquids away from the machine

Moisture + electricity = catastrophic failure.

✔ Train operators regularly

Most electrical accidents happen due to improper handling.

✔ Allow only certified technicians to enter cabinets

General electricians should not adjust PLCs, VFDs, or servo systems.

Machine Matcher CTA — Book a Full Electrical Safety Audit

Machine Matcher offers complete electrical safety audits for all roll forming machines, including:

• Emergency stop testing

• Guard & interlock inspection

• Sensor & encoder verification

• Panel heating analysis

• Cable/terminal inspections

• PLC & VFD safety logic review

• Compliance upgrades (CE/UKCA/OSHA)

• Full written safety report

Keep your operators safe. Keep your machine compliant.

Book your safety audit today with Machine Matcher.

Machine Matcher now offers full electrical technician services for roll forming machines — including diagnostics, rewiring, testing, encoder calibration, PLC programming, electrical audits, and preventive maintenance.
We support all machine types and all global regions.
Contact us today for immediate technical assistance or to schedule a full electrical inspection at your factory.

Looking for the right roll forming machine or expert guidance on your next project? Machine Matcher is here to help. Our global team provides 24/7 technical support, expert advice, and guidance on machine selection, setup, and maintenance—ensuring your operations run smoothly from day one.

With team members based worldwide—including the UK, USA, Middle East, and beyond—we are equipped to assist buyers across the globe. Whether you’re sourcing a single machine or upgrading an entire production line, our experts are ready to provide tailored solutions and support every step of the way.

Get in touch now and let Machine Matcher help you find the perfect roll forming machine for your business.

United Kingdom (Main Office)
Phone: +44 20 335 56554

United States
Phone: +1 407 559 7948

Mobile / WhatsApp: +44 7816 972935

Email: [email protected]