Grinderpedia is your source for all things horizontal grinders, recyclers, and hammer hogs. Get the low-down on industry terminology, colloquialisms, and learn the ins-and-outs of Peterson’s industry-leading machines. Grinderpedia is your source for What You Need to Know.
The Adaptive Feed Control System controls all components of the feed system to optimize output. This system monitors the grinding load and varies the speed of the feed system to keep the engine working at the top of its power curve. It automatically accelerates the feed rollers, slows when the load is high, and reverses if the engine speed drops. It even monitors the engine temperature and varies the cooling fan speed to minimize power usage and reduce fuel consumption.
Airbags are used to provide positive air pressure to hold the anvil assembly in place during the grinding process. The air pressure can be adjusted depending on the type of feed material that is being ground to cushion against impacts (similar to a suspension system on a tractor-trailer, that cushions bumps).
A Cold Weather Kit is for customers that are operating in cold climates. There is a diesel and an electric option, but diesel is the most common as it can operate without needing a connection to a power source. Cold Weather Kits become more common when the temperature is below freezing, but especially once it has dropped below 0°F (-17.78°C).
This feature helps heat the engine block and the hydraulic oil which allows for smoother starts after machine down time and keeps the engine warm while being ran.
The compression roll service mode is a safety feature unique to Peterson machines that ensures the service is done safely and effectively by raising the compression roll high enough to service the rotor, securing it, and disabling the system. This keeps service personnel safe, and maintenance quick.
The Discharge Belt on Peterson horizontal grinders is a cleated, single conveyor belt that moves materials, which have been passed through the grinding chamber, away from the machine into a stockpile. The discharge belt length and height determines the stockpile size before it needing to be removed or the grinder repositioned.
An Electronic Control System (ECS) is a controller, programmable logic controller (PLC), or processor that controls the automatic electrical and hydraulic functions of a machine. It also controls safety systems, operating, and captures important machine data.
The optional feed chain return pan is used when the horizontal grinder is being used in an application when a perfect product is desired (when the slide gate is in the closed position) recirculating the unground material to be reduced again (or for easy cleanup). The pan is located underneath the hopper.
The Feed Opening is the area under the compression roll at the maximum working lift height. This is the area that all material must pass under and through to enter the grinding chamber. It is generally measured height by width.
All Peterson tracked machines come standard with triple grouser track shoes. Track shoes are what gives a machine the traction in mud, snow, and other soil conditions to move easily. Shoe styles range from rubber for indoor and pavement, to heavy duty for rocky ground. Different shoes perform best in different conditions.
Triple grouser track shoes are suitable for soft and hard ground while providing maneuverability. The grouser teeth (perpendicular protrusions) are shallow and spaced fairly close together as opposed to single grouser track shoes–providing more flotation above the surface. This means less ruts and washboarding.
Single and double grouser track shoes are available as an option on most tracked Peterson machines.
The hammer is the bit holder and bit assembly, which includes the bit spacer. The hammer strikes against the anvil, breaking material up.
The bit holder can be referred to as the hammer without referring to the whole assembly. A series of holders are welded to a shell rotor or secured in place by rotor pins to a pinned rotor in a predetermined pattern, each holding a grinding bit. Grinding bits are secured to the holders by bolts, washers, and lock nuts.
A hammermill is a general term referencing grinders as a mill that hammers material into small pieces. The word hammermill can be used in reference to the whole machine, or alternately, just the rotor and hammers.
The Impact Release System is a patented Peterson system that allows the ejection of contaminants from the grinding chamber to reduce or eliminate damage to the grinding chamber.
The Impact Release System opens the anvil and first grate section to eject ungrindable objects, then returns to normal operation. This results in more uptime and less costly damage from heavy contamination in the feed material.
The Parker IQAN (pronounced i-can) system is the main computer processor and control system platform used on all Peterson equipment. The IQAN controls monitor machine inputs and outputs while controlling machine functions. It is the primary interface for the operator to control performance and functions.
Land Clearing Mode is a special code in the machine’s IQAN control system that controls the functions of the compression roll to increase the maximum lift height and allow large unprocessed pieces into the grinding chamber.
The optional Magnetic Head Pulley is positioned at the top of the discharge belt and is designed to pull ferrous materials (such as nails) from the ground material. The ferrous metal then travels around the head pulley and is separated and falls down the metal collection chute into a container below, or onto the ground.
Peterson’s optional metal collection box is a useful containment tool to collect scrap metal (ie. Nails and other ferrous fasteners) collected by the optional cross belt magnet. This box is designed to be attached to the machine allowing the grinder to remain mobile. The metal collection box is easily emptied from a chute at the bottom of the box.
A style of rotor where the hammers are secured by large pins. Pinned rotors are best for contaminated applications, allowing faster part replacement due to damage. It also prevents the replacement of a whole rotor in the case of contaminated materials.
Rotor Drums, also known as hammer hogs, or horizontal rotary mills are the mounting structure for horizontal bits that process the feedstock material into smaller pieces before further processing. Rotor drums are safely used in horizontal material Recyclers and Grinders as opposed to tub grinders which have a much higher risk factor.
The Scrap Metal Chute is the large steel pan that hangs beneath the discharge belt. The magnetic head pulley at the top of the discharge belt holds tramp metal to the conveyor as it returns the loop. The metal releases from the belt once it’s pass the head pulley and drops onto the scrap metal chute. This helps keep metal out of the stockpile. Putting a bin below to collect metal materials will keep it separate.
A shear pin is a replaceable metal pin designed to break away when an excessive amount of force is applied to it. The shear pins are located in specific positions to protect the machines from catastrophic failure in the event of ungrindable contaminants getting inside the grinding chamber.
The driver sheave and the driven sheave are the two grooved pulleys that drive the belt that connects the powertrain to the drum or chipper disc. The size ratio between the two sheaves affects rotor or disc speed.
A Shell rotor is a style of rotor where the hammers are welded onto a smooth drum surface versus pinned as with a pinned rotor. Shell or Drum rotors are best for applications with low contaminationfeedstock for longer wear. Drum rotors typically produce a more consistent end product than pinned rotors.
A Slide Gate is a pan that is located under the infeed head pulley and above the discharge belt that controls and directs any material that drops through the head pulley. When the slide gate is open the material drop directly onto the discharge belt with the processed material. When closed, it discharges the material for regrind directly beneath the grinding chamber. Combined with the feed chain return pan, and this material is carried to the end of the hopper for easier clean-up. Add the infeed tailgate and the material will attempt to recirculate.
Slow Speed term used with or to describe shredders for the fact that the rotor(s) turn at low rpm (generally under 100rpm). The R+ horizontal grinder package offers a slow-speed rotor for heavy-duty applications.
A Soft Start motor is a type of AC (Alternative Current) electric motor controller that temporarily reduces the load and torque (rotational force) on the motor during start-up, to prevent electrical current surges. This is especially important with large horsepower motors, that require a lot of power to get started. This type electric motor start-up also reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical distribution network, extending the lifespan of the control system.
Peterson electric chippers and grinders can be controlled with either soft starts of VFD (variable frequency drives). Soft starts are the most economical however they are limited to one speed and can result in high short term peak current loads. If electric energy is paid including a load factor for peak energy demand, the monthly bill may be very high because of the peak loads.
Peterson electric machines with a 100HP electric motor running a hydraulic system is controlled with a soft start(er).
Tier II (Tier 2), is an engine emissions standard. There are several tiers of emissions standards that large diesel engines must adhere to by certain dates.
Tier II engines have more advanced technology than Tier I which reduces the amount of nitrogenous emissions from the engine. Tier II was implemented from 2001-2003 and was the current standard until 2005.
Tier III (Tier 3), is an engine emissions standard. There are several tiers of emissions standards that large diesel engines must adhere to by certain dates.
Tier III engines have more advanced technology than Tier II which reduces the amount of nitrogenous emissions from the engine. Tier III was implemented from 2005-2006 and was the standard until the interim Tier IV was implemented in 2011 and the final Tier IV requirement was implemented in 2014.
Tier IV (Tier 4), is an engine emissions standard. There are several tiers of emissions standards that large diesel engines must adhere to by certain dates.
Tier IV engines have exhaust after treatment systems to reduce emissions of particulate matter (soot) and nitrogenous compounds. This EPA mandate significantly reduces smog and other pollutants from diesel machinery.
A Variable Frequency Drives (VFDs) also known as adjustable-frequency drives, are a type of AC (Alternating Current) electric motor controller that adjusts the rotational speed (rpm) of the motor. Having the ability to change the motor speed allows for more control of the motor’s power delivery to the grinder rotor or chipper disc. The VFD changes the input frequency (Hz) and voltage to change the speed. An equally important feature of a VDF is that it can limit electrical demand, or spikes that a large load on the rotor or disc can create. This feature may reduce the electrical cost of operating the machine.
Peterson offers either a VFD or soft start option for the main rotor drive motors for most of electric grinders. VFDs are more expensive, and more complicated, but they allow more control over the motor’s speed and power output.
Peterson electric chippers and grinders can be controlled with either soft starts of VFD (variable frequency drives). VFD’s can provide variable speed that can be used to optimize the end product quality and production. They can also be programmed to limit peak power (typically 150%) which can help reduce the utility bill. VFD’s can cause electrical “noise.” Some Utilities will require additional conditioning filters. VFD’s also have a finite life and require added cooling in the control room.