Automatic M-Type Pallet Wrapper with Film Cutting, Clamping and Remote Control — Engineering Specifications and Field Performance

Executive summary An automatic M-type pallet wrapper is a stretch wrapping machine whose turntable features precision deck cut-outs that allow a manual pallet jack to load and unload directly at floor level without an inclined ramp. Wrapping cycles are triggered via an RF remote, the film is applied through a motorized power pre-stretch carriage, and the film tail is automatically clamped, pneumatically cut, and wiped flat against the load. Representative engineering data covers a 2500 kg maximum payload, a 2400 mm wrap height, and an operating cycle of 45 to 65 seconds for a standard 1.6 m load.

Table of Contents

• What an M-type wrapper does
• Film cutting and clamping system
• Remote control operation
• Powered pre-stretch system
• PLC and HMI wrap parameters
• Turntable design and maintenance
• Technical specifications
• M-type vs standard turntable vs rotary arm
• Machine selection checklist
• Engineering FAQ
• Next step
• Related reading
• Sources and standards

What an M-type wrapper does

An M-type pallet wrapper (also known as an open-access or horseshoe turntable wrapper) integrates precision cut-outs directly into the rotating turntable deck. These slots match standard hand pallet truck fork dimensions, eliminating the need for an external approach ramp or an in-ground turntable pit.

On EUR pallets (800 × 1200 mm), fork widths typically run 160 to 180 mm with outer fork spreads around 520 to 680 mm. On standard US GMA pallets (48 × 40 in), outer spreads reach 685 mm. The representative unit features slot cut-outs 220 mm wide at 850 mm center-to-center, providing sufficient lateral clearance (±35 mm lead-in allowance) so an operator can guide a manual jack or electric walkie directly onto the rotation center without fork hang-up.

For operations using pallet jacks, eliminating the ramp removes significant hazards:

• Operators do not have to struggle pushing a 1500 kg payload up a 10° to 15° incline, reducing operator musculoskeletal strain.
• It saves 1.5 to 2.0 meters of floor run that an external ramp typically occupies.

The operating sequence runs continuously: the operator rolls the pallet jack into the cut-outs, lowers the forks onto the turntable deck, withdraws the jack, and triggers the cycle via an RF remote. The machine applies film under controlled pre-stretch, completes top and bottom reinforcement layers, severs the film, secures the tail, and returns to the home index position so the cut-outs align perfectly with the floor entry path. A standard 1.6 m tall pallet completes within 45 to 65 seconds depending on wrap count settings.

Film cutting and clamping system

The automatic cut-and-clamp unit eliminates manual film handling. At cycle completion, an air-actuated mechanical clamp holds the film web, a pneumatic rodless cylinder fires the industrial cutting blade, and a trailing spring-loaded brush or foam wiper seals the tail against the wrapped pallet face.

• Actuation Speed: Dual-acting pneumatic solenoids trigger the cut blade with a 12 to 18 ms dynamic response.
• Tail Restraint: The mechanical clamp maintains an 80 to 120 N retention force to securely anchor the initial film tail for the subsequent wrap cycle.
• Tail Management: The system leaves a controlled 150 to 200 mm film tail, which is immediately wiped flat against the load face by an integrated pneumatic wiper pad. Eliminating trailing film tails prevents load snagging during automated roller conveyor transit or less-than-truckload (LTL) trailer loading.

Operating in Cold Storage (Below 5°C): In refrigerated distribution centers, pneumatic condensation leads to solenoid sluggishness and frost formation on blade slide rails. To ensure rapid blade actuation, facilities must fit a 5 µm coalescing particulate filter paired with an automatic desiccant drain directly at the machine air regulator inlet, maintaining a dry dew point (Class 4 according to ISO 8573-1).

Remote control operation

The wrapper is controlled via an industrial-grade RF remote operating in the 433 MHz or 2.4 GHz ISM frequency band, delivering a 15 to 30 m line-of-sight range with under 50 ms command response latency. Handsets feature an IP65 ingress protection rating against warehouse dust and humidity.

• Operator Efficiency: Forklift or pallet truck drivers can initiate cycles and adjust pattern density without dismounting or walking to a stationary control cabinet.
• Failsafe Communication: The remote links to the machine’s safety PLC circuit. If RF transmission encounters interference or signal loss exceeding 500 ms during active rotation, the controller initiates an immediate controlled deceleration stop at 2.5 rad/s², stopping carriage elevation and turntable motion until an operator reset is executed.

Powered pre-stretch system

The film delivery carriage features an electrically driven power pre-stretch assembly. Two precision polyurethane-coated rollers rotate at differential surface speeds controlled by gear ratios or independent dual VFDs, yielding an accurate 150% to 300% elongation ratio (factory calibrated to 250% for 20 µm to 23 µm machine-grade LLDPE stretch film).

• Material Economy: Stretching 1 meter of master roll film to 3.5 meters (250% pre-stretch) lowers consumable film expenditure by over 50% compared to standard friction-clutch carriages while establishing consistent containment force.
• Tension Isolation: The load-cell or analog dancer-arm system monitors web tension between the secondary roller and the pallet corner, decoupling film elongation from corner pallet pull forces to prevent crushing light corrugated cartons.
• Roller Maintenance: The vulcanized polyurethane roller coatings represent primary wear surfaces. Inspect coating concentricity and surface grip every 500 operating hours. Clean surface glaze with isopropyl alcohol. Replace or re-lag the rollers if localized wear grooves exceed 0.5 mm or if slip-induced film thickness variation creates visual banding on the pallet corners.

PLC and HMI wrap parameters

The electrical architecture utilizes a Siemens S7-1200 controller paired with a 7-inch industrial color touchscreen HMI (S7-1500 optional for networked DCS integration). The HMI stores multi-tier password-protected wrap recipes, allowing instant changeovers for unstable tall stacks, dense drums, or fragile carton loads.

Key adjustable wrap parameters:

• Top Wraps: 2 to 4 layers to lock upper cargo layers together against transit tilt.
• Bottom Wraps: 2 to 3 layers to anchor the cargo securely to the wood pallet deck.
• Carriage Traverse Speed: 1.5 to 5.5 m/min variable frequency speed control, dictating film layer overlap pitch.
• Turntable Speed: 3 to 15 RPM with programmable S-curve acceleration and deceleration ramps to prevent payload centrifugal displacement.

Turntable design and maintenance

The 1650 mm turntable disk is constructed from 12 mm Q355B structural steel plate supported by internal cross-bracing. Because fork entry cut-outs interrupt the outer hoop stress continuity of the disk, the open design exhibits a 15% to 18% torsional rigidity reduction compared to a solid circular plate. For concentrated point loads or pallet weights approaching the 2500 kg maximum limit, the internal structural web is reinforced with stiffening gussets.

Turntable kinetic assembly:

• Bearing & Support Layout: The central drive shaft anchors in a heavy-duty thrust bearing assembly, while peripheral vertical loads are sustained by an array of heavy-duty, wear-resistant polyurethane caster rollers tracking along a machined steel raceway.
• Non-Destructive Testing (NDT): After 10,000 to 12,000 cycles, inspect the internal radius corners of the fork cut-outs for fatigue micro-cracking using dye penetrant testing (PT). Smooth-grind and weld-repair any stress-concentration crack indications immediately.
• Lubrication Schedule: Grease the main central bearing, drive chain tensioner, and caster pivot points every 500 operating hours using NLGI Grade 2 lithium-complex EP grease. Maintain drive chain tension with 10 to 15 mm mid-span deflection.

Technical specifications

The following engineering parameters reflect the baseline configuration for the representative automatic M-type machine class (FH-M2500 series):

M-type vs standard turntable vs rotary arm

Selecting the correct pallet wrapping architecture depends on your handling vehicle mix, available floor area, and cargo stability:

Machine selection checklist

Review these engineering boundary conditions prior to finalizing equipment layout and order confirmation:

Engineering FAQ

Q: Does an M-type wrapper require an approach ramp or foundation pit? A: No. The recessed M-profile cut-outs directly accept the wheels and forks of manual pallet jacks and powered walkies at floor level.

Q: How does the pneumatic cut-and-clamp handle cold storage environments? A: Sub-zero air generates line moisture that slows blade actuation. Installing an oil-water coalescing filter and an automatic desiccant dryer directly at the machine air intake prevents valve icing and ensures consistent 15 ms blade response down to -10°C.

Q: What is the primary maintenance requirement for an M-type open turntable? A: Because fork cut-outs induce local stress risers, perform dye penetrant inspection on the cut-out slot radius corners every 10,000 to 12,000 cycles. Lubricate central bearings and peripheral polyurethane track rollers every 500 operating hours with NLGI 2 grease.

Q: What happens if the RF remote signal is interrupted during a wrap cycle? A: The safety PLC monitors RF heartbeat signals on a dedicated channel. If communication is lost for more than 500 ms, the system executes an automated ramped stop (decelerating at 2.5 rad/s²), halting rotation and locking the carriage elevator until reset.

Q: How does the operator initiate and monitor the wrapping cycle? A: The operator drives into the turntable, drops the pallet, pulls back the jack, and presses start on the handheld IP65 RF remote (15 to 30 m range). The entire pre-stretch, cycle wrap, film cutting, and wiping sequence runs automatically.

Q: What prevents the cut film tail from unraveling during downstream transport? A: The integrated pneumatic clamping arm secures the active film tail for the start of the next pallet, while an air-assisted wipe-down brush presses the severed 150 to 200 mm tail firmly against the pallet wrap layer.

Q: What is the standard packaging cycle duration? A: A 1600 mm tall pallet running 3 bottom wraps, 3 top wraps, and standard pitch completes within 45 to 65 seconds, translating to an effective throughput of 35 to 45 pallets per hour.

Q: What stretch film grade is recommended? A: Machine-grade LLDPE stretch film (cast or blown), 20 to 23 µm thickness, 500 mm roll width with 76 mm (3-inch) cores, capable of maintaining integrity at 250% power pre-stretch.

Next step

1. Forward your pallet dimensional envelope (L × W × H), maximum weights, and internal transport equipment models to info@fhopepack.com.
2. Our engineering office will generate an equipment layout drawing and commercial specification sheet within 48 hours.
3. Schedule an engineering video audit or site review to confirm floor flatness, utility drop locations, and safety perimeter requirements.

Related reading

• Rotate arm stretch wrapping machine, pallet wrapping machine
• Cold storage pallet Inverter
• Automatic pallet wrapping and strapping system at one station
• Pallet inverter manufacturer
• FHOPE packaging machinery product lines

Sources and standards

• ISO 12100:2010 — Safety of machinery: General principles for design, risk assessment and risk reduction
• EN 415-10:2014 — Safety of packaging machines: General requirements
• EN ISO 13849-1:2023 — Safety of machinery: Safety-related parts of control systems
• IEC 60204-1:2016 — Safety of machinery: Electrical equipment of machines
• IEC 61508 — Functional safety of electrical/electronic/programmable electronic safety-related systems
• FHOPE automatic M-type pallet wrapper demonstration video, YouTube.

Last reviewed: 2026-10-09