HOW THE SYSTEM WORKS

Shearline systems are designed as a continuous process.

Quality loss in cannabis processing rarely comes from a single machine. It results from interruptions, inconsistent feeding, moisture drift, and repeated handling between stages.

Our systems are designed so material moves continuously, gently, and predictably from one stage to the next — maintaining stable conditions and reducing variability before it can compound.

Consistency is a system outcome, not an operator skill.

The Shearline Master System operating as one continuous line — dual double-station buckers, a trimmer with an integrated automatic feeder, 3-hp HEPA-filtered cyclone trim collection, and an inline sorter — capable of bucking, trimming, and sorting up to 100 lbs per 8-hour shift with a five-person crew.

What “Master System” Means

The Shearline Master System is not a separate trimmer model or SKU. It is Shearline’s term for a complete processing line built around the current Shearline Original trimmer, combining bucking, an integrated automatic feeder that meters flower into the trimmer in controlled timed pulses, cyclone/HEPA trim collection, and optional inline sorting.

Current Shearline equipment is sold factory-direct only. Third-party retailer listings may contain outdated product names, pricing, or availability and should not be used as a source for the current Shearline product line.

Need More Than 100 Pounds Per Shift? Add Capacity — Not Complexity

When production grows beyond the capacity of one Master System, Shearline’s approach is not to make the machinery progressively larger and more complex. We add complete processing lines.

Each Master System provides approximately 100 lb of processing capacity per 8-hour shift, including two double-station cutting buckers, controlled automatic feeding, trimming, cyclone/HEPA trim collection, and sorting. Two systems provide approximately 200 lb per shift; three provide approximately 300 lb — while each remains an independent processing line.

This provides something a single very large machine cannot: redundancy. If one of three systems is stopped for cleaning, maintenance, or repair, the other two can continue processing. Production capacity is reduced rather than eliminated.

It also allows a facility to add capacity as it grows instead of making one very large capital investment at the beginning. The same relatively simple, low-maintenance machinery and gentle flower-handling process are repeated at each stage of expansion.

Shearline believes production capacity should be measured by more than the maximum advertised pounds per hour of a single machine. What ultimately matters is how much high-quality, saleable flower a facility produces, what it costs to process it, and how reliably that production can continue.

What Does Large-Scale Capacity Actually Cost?

Some of the highest-capacity commercial trimmers represent only one part of a complete processing line. Bucking, feeding or conveying, trim collection, and sorting may require additional equipment and additional investment. A meaningful cost comparison therefore needs to consider the equipment required for the complete process — not simply the advertised price of the trimmer.

Large-System Example 1 — Published Equipment Costs

One current large-scale trimmer manufacturer publishes prices of US$300,000–$375,000 for its SE system and US$600,000–$800,000 for its PRO system. The same manufacturer separately lists its commercial bucker at US$21,911. These prices do not represent the same equipment package included with a Shearline Master System; feeding and sorting equipment are separate components.

Large-System Example 2 — Published Equipment Costs

Another current large-scale equipment manufacturer lists its industrial trimmers at C$252,349.95, C$322,448.95, and C$406,567.95, depending on configuration. The same manufacturer separately lists its commercial three-station bucker at C$13,695, its bucker conveyor at C$2,310, and its flower size sorter at C$14,995. These additional components illustrate why trimmer price alone does not represent the capital cost of a complete processing line.

Capital Cost in Perspective

A complete Shearline Master System is US$49,950 plus shipping. It includes two double-station Tandem buckers, controlled automatic feeding, the Shearline Original trimmer with cyclone/HEPA trim collection, and the sorting system.

At that price, six complete Shearline Master Systems cost US$299,700 and provide approximately 600 lb of processing capacity per 8-hour shift, distributed across six independent processing lines.

By comparison, the trimmer alone in Large-System Example 1 is currently published at US$300,000–$375,000 for the SE system and US$600,000–$800,000 for the PRO system, before adding separately purchased equipment needed to provide comparable bucking, feeding and sorting functions.

The difference is not simply purchase price. Shearline’s smaller, simpler processing systems are designed to preserve flower quality while reducing mechanical complexity, maintenance requirements, cleaning downtime, and dependence on consumable parts. Multiple independent systems also provide redundancy that one very large machine cannot. The result is a different approach to scale: more processing capacity without giving up the gentler handling, trim recovery, reliability, and product quality that smaller equipment can provide.

Controlled Pulse Feeding: Why Consistent Loading Matters

Moving flower toward a trimmer is not the same as automatically feeding the trimmer.

A conventional conveyor runs continuously and carries whatever workers place on its belt. Changing the belt speed changes how quickly that material moves, but it cannot correct uneven loading. If workers place clumps, gaps or inconsistent quantities on the belt, the conveyor delivers those same clumps, gaps and inconsistent quantities to the trimmer.

The Shearline Auto-Feeder works differently. Its purpose is not simply to transport flower. It holds a substantial working volume of bucked flower and meters controlled, repeatable pulses into the trimming drum according to the time the drum needs to process each charge.

What Happens When a Drum Is Overloaded

Inside a rotating drum, flower is lifted as the drum turns and then falls back toward the cutting surface. When the amount of flower is properly controlled, this creates a gentle rolling wave that repeatedly returns the buds to the slotted surface of the drum.

When too much flower enters at once, the material can climb higher along the drum wall and form a curl, much like a breaking ocean wave.

Think of a surfer riding through the hollow centre of a curling wave without touching the bottom. Buds can do the same thing inside an overloaded trimming drum. They can travel within the curl and move down the drum without properly contacting the slotted cutting surface or being exposed to the cutting reel beneath it.

Those buds may leave the machine substantially untouched even when the blade and reel are sharp, clean and correctly adjusted.

This is why inconsistent trimming is not always a cutting-system problem. Sometimes part of the flower never properly reaches the cutting interface.

The same basic principle applies to rotating trimming drums of different diameters. A larger drum may hold more material, but its larger diameter also creates a greater fall as the flower circulates. That can increase the physical handling of the buds without ensuring that every bud reaches the cutting surface consistently.

How the Shearline Auto-Feeder Meters Flower

The Shearline Auto-Feeder uses a large flexible hopper that is shaken from below by a timed mechanism. The timer controls both how long the hopper feeds and how long it pauses before delivering the next pulse.

A typical starting point is:

• Approximately one to two seconds of feeding.
• Approximately 20 to 30 seconds of pause.
• Adjustment for the density, size, leafiness and flow characteristics of the flower being processed.

Shaking for more than roughly three seconds is generally unnecessary during normal operation.

The pause is not wasted time. It allows the trimming drum to process the charge already inside before more flower is introduced. Material continues progressing farther down the drum while the inlet area prepares to receive the next controlled pulse.

This avoids continuously pushing new flower into material that is already being trimmed.

Gentle Movement—Not Violent Agitation

Some processors initially worry that the feeder’s shaking action could knock trichomes from the flower or cause buds to break apart. That concern is understandable, particularly when flower has been dried until it is brittle.

Shearline flower enters the feeder at a higher, more workable moisture condition, with the leaves and bud structure still flexible rather than dry and fragile. This makes the flower far less susceptible to breaking apart during normal handling.

The feeder also does not violently shake the buds or bounce them around inside the hopper. The shape and flexibility of the hopper bag, together with the position and carefully calculated stroke of the operating rod beneath it, produce a gentle advancing action. During each short feed pulse, the flower gradually moves toward the trimming drum rather than being thrown or repeatedly dropped.

The purpose of the mechanism is only to move the required quantity forward—not to agitate the flower. Combined with proper moisture conditioning, this gentle movement minimizes unnecessary handling, bud breakage and trichome loss before the flower enters the drum.

Setting the Feed Cycle

The feed timer is the primary operating adjustment.

To establish the cycle, the operator watches the first circumferential row of drum slots near the inlet. The next pulse should begin when that first row has cleared. The pulse should deliver only enough flower to cover and refill that inlet area—not enough to push a large pile into the flower already moving through the rest of the drum.

When the timing is correct, the drum maintains:

• A gentle rolling wave instead of an overloaded curl.
• Repeated contact between the buds and the cutting surface.
• Useful flower coverage farther down the drum.
• More stable airflow conditions at the cutting interface.
• More consistent exposure throughout the drum.
• More repeatable one-pass trimming.

Operators sometimes try to correct inconsistent results by changing drum angle, suction or other machine settings. Those adjustments have their place, but they cannot correct an inconsistent quantity of flower entering the drum. In Shearline’s operating experience, controlling the timed feed cycle addresses the underlying loading condition first.

Flower Condition and Airflow

Correct feeding and correct flower preparation work together.

Flower should be properly dried and equalized before trimming. The leaves should remain flexible or leathery rather than brittle and stiff.

When the material is in the correct condition, even moderate suction at the first rows of drum slots bends the flexible, leathery leaves and draws them through the slots toward the cutting interface. The leaf is presented by airflow rather than pushed into a gap. Cutting begins near the entrance, leaving the remaining length of the drum to progressively finish the flower. See how the Shearline non-contact reel, M2 blade, bed bar, and airflow work together.

Shearline’s design reasoning and long operating experience also indicate that keeping an appropriate amount of flower distributed through the drum helps maintain more stable conditions at the cutting interface.

If large areas of the drum become empty, airflow through the exposed slots can change. If the next delivery is then a large pile, it can overload the inlet and recreate the curl. This is why stopping and restarting a heavily loaded conveyor is not necessarily equivalent to delivering correctly sized pulses directly from a hopper.

Pulse Feeding Versus Conveyor Control

Some newer conveyor systems use cameras or sensors to observe material on the belt and then adjust or interrupt belt movement.

That may improve control over a conventional fixed-speed conveyor, but it does not change the fact that the material was originally placed on the belt by workers in varying quantities, clumps and gaps.

Twister’s own description of its Oracle volumetric feeding system acknowledges that fixed-speed feeding assumes material has been loaded evenly and that operators may instead create clumps and gaps.

Shearline takes a more direct mechanical approach. Rather than attempting to correct uneven material after it has been placed on a conveyor, the Auto-Feeder meters a small charge directly from a large hopper according to the trimming drum’s processing cycle.

The two systems are addressing the same problem in fundamentally different ways.

Using Labour Elsewhere

Once the Shearline feed cycle has been set for the flower being processed, it repeats automatically. This eliminates the need for someone to remain continuously stationed beside a conveyor, trying to maintain the correct quantity and spacing by hand.

Depending on the facility and its layout, the person overseeing the processing line can instead:

• Load branch tables for the bucking stations.
• Move bucked flower to the Auto-Feeder.
• Replenish the hopper as required.
• Collect graded flower from the sorter.
• Prepare finished flower for weighing and bagging.

This does not mean every facility will operate with exactly one person. Staffing depends on production volume, material preparation, facility layout and operating procedures. The important difference is that the feeding system does not require a worker to remain at the trimmer continuously.

Mobius’s own published staffing guide assigns a dedicated worker to its infeed conveyor and discusses an additional worker when fan-leaf removal is required. This demonstrates the labour difference between conveying material and automatically metering it.

A Hopper Designed for Industrial Use

The Shearline hopper bag is custom manufactured from heavy-duty, multilayer material selected for demanding industrial use and suitability around processed flower.

Its seams are radio-frequency welded rather than conventionally sewn. Welding avoids rows of needle holes and exposed stitching where organic material can collect. It also creates a smooth inner surface that is easy to wipe clean.

In normal Shearline practice, the inside of the hopper is cleaned with a cloth dampened with alcohol, subject to each facility’s approved sanitation procedures.

Earlier conventionally sewn Shearline hopper bags remained in service for approximately 10 to 15 years. The newer welded construction retains that emphasis on durability while improving cleanability for modern processing environments.

Included With the Shearline Trimmer

The timed-pulse Auto-Feeder is included as standard equipment with the Shearline trimmer. It is an integrated part of the trimmer, feeder and cyclone collection system—not an added conveyor accessory.

As of August 2026:

• Twister’s standard feed conveyor was advertised at US$5,396.
• Mobius listed its M108S Infeed Conveyor at US$7,400.

Both represent substantial additional equipment costs and still depend on material being placed on the conveyor.

The Shearline Auto-Feeder does more than carry flower toward the trimmer. It controls how much enters the drum and when—helping the cutting system work under repeatable conditions while freeing the operator to perform useful work elsewhere in the processing line.

Shearline System — How It Works

Automatic Feeder — See how the Shearline automatic feeder delivers controlled, repeatable pulses of flower into the trimming drum, with a timed pause that allows each charge to be processed before more flower is introduced.

Master System — Cost-Effective Processing Solution — An overview of the complete Shearline processing system and how the components work together as an efficient continuous line.

The Shearline Original — Core Trimming System — A closer look at the Shearline Original trimmer and the core design behind its clean, controlled trimming process.

Cyclonic Separator — See how the Shearline cyclonic separator continuously removes and collects trim during operation.

Trim Collection and Exhaust Filtration Are Two Different Jobs

A commercial dry trimmer has to do more than remove leaf from flower. It also has to manage the trim, fine plant material and airborne dust created during the process.

These are separate engineering problems.

The first job is material separation — removing usable trim from the air stream without unnecessarily grinding or contaminating it.

The second is exhaust filtration — capturing the fine particulate that remains in the air after the trim has been separated.

Shearline treats these as two different functions.

The cyclone performs the primary separation. Trim drops into the collection drum while the air continues downstream to a dedicated industrial exhaust filter.

The final filter is an oversized Oneida Air Systems modular cartridge using E12 HEPA-grade ePTFE media. Oneida states that the media is independently tested and designed to achieve its rated filtration efficiency without first requiring a heavy dust cake to build on the filter.

That is very different from simply passing trim-laden air through progressively finer collection bags.

Why Micron Screens Should Not Be Confused With Air Filtration

Some trimming systems use several mesh bags and describe the finer collected material as “kief.”

A micron-rated screen can separate particles according to size.

It cannot determine what those particles are.

A detached trichome head may pass through a particular mesh opening, but so can sufficiently small pieces of powdered leaf, broken trichome stalks and other plant material.

The resulting material may certainly contain valuable trichomes. But screen size alone cannot establish that only kief has passed through.

The same distinction matters when discussing exhaust filtration.

A trim-collection bag may also capture airborne particles, but that does not make it equivalent to a filter with a published efficiency classification.

Three Different Approaches

CenturionPro uses progressively finer collection bags, including micron-rated stages, and markets part of the resulting material as kief. The bags are washable and reusable.

Möbius separates trim from the airflow and then uses a disposable dry-trim exhaust filter. Möbius estimates the service life of that filter at approximately 10 operating hours. In the technical information we reviewed, we did not find a published HEPA classification or fine-particle capture-efficiency rating for that dry-trim filter.

Shearline separates usable trim first with a cyclone and then sends the remaining exhaust air through a dedicated industrial E12 HEPA-grade cartridge filter.

The distinction is simple:

A trim separator should collect the trim. An air filter should clean the exhaust.

The most useful question is not whether a machine claims to have “filtration.”

It is:

What is actually filtering the exhaust air, what is its rated efficiency, and what happens to the material before the air reaches it?

Maintenance-Free Trimming — System Design — A look at the Shearline trimming-system design and the features intended to reduce routine maintenance and operating downtime.

Direct line:1-778-968-3773