Notice of a change of Equipment Specification

12/03/2010

Louvre Drive Actuator Type Magpush GC84TL20/56 240 v ac. 170mm Stroke.

Time to fully extend = 17seconds.

The Magpush actuator has been the standard drive motor for the last 26 years on Farm Electronics Motorised Louvres. It has proved a most robust and reliable device in most situations. Unfortunately the manufacturer, SKF has advised us that this model will be discontinued in 18 months time.

We have now selected a new Actuator called the Mingardi D8 that we intend to supply with all Farm Electronics systems from April 2010. While physically being quite similar to the Magpush unit it has some significant differences in its operation.

Firstly the Mingardi actuator is much faster (Time to fully extend = 8seconds). For this reason it cannot be used as a replacement on existing Magpush equipped installations. (all actuators must run at similar speeds to maintain “AIR MIX” proportions). Air Mixing will be fine on new installations, as we will adjust the Cropscan “Louvre Pulse Times” to suit the faster shaft speed.

Secondly it will now be possible to connect the actuators “in parallel” in regards to the wiring back to the main control panel. This practice was not possible with the Magpush type device. On the downside of this feature, it will no longer be possible to fit position indication lamps (Open – Close) for individual louvre motors.

We have manufactured a mounting bracket for the Mingardi D8 actuator that is interchangeable with the Magpush bracket. Therefore it will be possible to upgrade an old Magpush system with all new Mingardi D8 motors without the need to make any mechanical alterations.

Upgrade of Existing Crop Stores

For stores that have Magpush Actuators that have a failure of a motor it will be necessary to replace all the actuators for MINGARDI D8 type.  In addition the air mix louvre 'pulse time' will need to be shortened.

For customers who have several Magpush equipped stores we strongly advise upgrading one store to MINGARDI D8.  The remaining Magpush actuators can then be retained as spares for the other stores.

December 2010

Stocks of spare Magpush Actuators have now been exhausted.

Pdf Drawing: Mingardi D8