Operating instructions

The DrillMaster is designed to drive a Proportional Flow Control Valve using a PWM out-
put. The valve controls the ow to 1 to 3 hydraulic motors so it can be used with 1 to 3 sec-
tion grain drills. All motors are in series so they all rotate at the same speed and there-
fore they all apply the same amount of seed. Three toggle switches (top of Console) turn
the sections off, bypassing a motor, so the RPM of the remaining motors do not change.
The DrillMaster operates as a “ground speed based controller” using a speed sensor input (from 1 of
the 3 sections) to maintain a target lbs/acre of seed as ground speed varies. An external Module is
used to multiplex the ow signal so a different section is used when a section is turned off. Going to
Hold, turning all Sections Off, or zero speed will stop auto control and will also stop the PWM Valve
drive if “Auto Shut Off” is turned on (enabled). All sections are automatically turned off if the speed
goes to zero while in Auto mode. Seed ow is measured indirectly by measuring the seed drive shaft
RPM instead of counting seed. The drill uses a one-point adjustable seed cup that is recognized
as the most accurate and trouble free available for a wide variety of agricultural seeds. DrillMaster
also provides an early warning when seed bins are nearly empty by ashing a “FILL” message.
Description of Operation
CrustBuster
DrillMaster Quick Start Guide
346-001150 Pg 3 Revised 11/2010