Frequently Asked Questions 
 Which Power Moller should I use?
 What is Zero Pressure Accumulation?  Itoh Denki ZPA1
 Does Itoh Denki make rollers capable of moving pallets in excess of 1000lbs.?
 How long has Itoh Denki been in business?
Itoh Denki was founded in 1946 and have been building electric motors ever since. Itoh Denki USA was founded in 1996 to meet the growing demand for Power Mollers in the U.S. market.
 When was the Power Moller invented?
 The Power Moller was invented in 1975.
Which Itoh Denki controller cards have ZPA logic pre-loaded?
Are any of the Itoh Denki controller cards programmable? 
 IB-E03  IB-E04F 
What type of warranty do your products carry?     Itoh Denki USA Warranty Statement
What is singulated release?
Singulated release is the most common ZPA operating mode. It requires a downstream zone to be clear of product before the product in present zone is allowed to be moved past its zone position sensor. When products have accumulated on the conveyor each controller detects if the adjacent downstream zones sensor is blocked. If the downstream zone sensor is blocked the present zone will remain stopped until the product in the downstream zone has cleared its zone position sensor.
What is slug release?
Slug release (Also called train mode) is an alternative ZPA operating mode. The main difference from singulated release mode is that it only required that the product in the downstream zone be moving with the zone running. In this case when products are accumulated on the conveyor all of the accumulated products move together in a slug or train when the most downstream products is released.
How do 24VDC powered rollers save energy?
There are two ways that 24VDC powered roller conveyors save energy when compared to other technologies of roller conveyor or belt conveyor.
The first way is by utilizing modular drives configured to power zones. The mechanical torque required for each zone is much lower when compared to a conveyor with a central drive powering long conveyor lines. Central driven conveyors are often specified with drives as much as 2X the required torque. The decentralized powered roller drives are more closely match to the required power for the product.
The second and more significant savings is attributed to the ZPA control logic. ZPA logic incorporates Run on Demand technology. This logic insures that zones are only turned on when a product approached from upstream and turns back off after the product leaves the zone. In contrast a centrally powered conveyor has a drive that runs continuously if product is being conveyed of if the conveyor is empty. Many centrally powered conveyors had mechanisms that disengage the rollers from the drive when the conveyor is accumulated but the drive continues to run and consume power.
What is rated performance & starting performance?
The rated specifications for torque, tangential force, & current is the level of roller performance with continuous operation (100% duty cycle) and at the max ambient temperature without reaching the thermal protection level of the motor or driver card. The roller will regulate its set rated speed while providing torque between the no-load and rated levels. This function is called Stable Speed.
The starting specification for torque, tangential force, & current is the maximum or peak level of roller performance. This is also sometimes referred to as transfer torque & tangential force.  This level of performance can be achieved under limited conditions. All Itoh Driver cards are limited to a starting current that will protect the roller and driver card from damage due to overload.
Do the rollers need a brake to keep them from coasting?
 No. All Power Moller 24 brushless DC rollers have dynamic braking as a function of their driver card. This braking is done electrically to dynamically bring the roller from its operation speed to zero velocity very quickly. The amount of time to stop or distance that the product will travel will vary based on the operating speed, roller diameter, and roller reduction gear ratio as well as the inertia of the conveyed product and the conveyors rotating mass. The actual amount of product coast may need to be determined by testing but is typically in the range of 1-3”. Many Itoh powered roller models are available with internal electro-mechanical brakes. These rollers require a driver card equipped to control the brake. The function of this brake is primarily to hold the product in place after the dynamic brake has stopped the roller. This is typically used for decline conveyors. Brakes are available in both standard torque and high torque varieties and are selected based on the product weight and degree of decline. Rollers with brakes can also be used in applications to produce consistent stopping distance with products of varying weights. The idLinX series of driver cards have selectable brake control options. These cards have the option for a servo brake function that can be used to hold a roller in place after it has stopped without an electro-mechanical brake inside the roller. Please contact Itoh Denki Technical Support as needed for applications requiring brake rollers.
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