Operating instructions

Pre-Planting Seed Calibration Process (using CAL TEST function)
This procedure is used prior to eld operation. These steps will determine a more
accurate Meter Cal value for your exact drill settings with your seed.
Preparation for Calibration
The hydraulic drive motors have a speed range of 45 rpm to 405 rpm therefore if the required speed
they must run to obtain rate is outside this range the red warning light will blink. To change the motor
speed the sprockets on the end of each drill box may need to be changed. The following procedure
will help you determine the correct sprockets for your seeding rate and drilling speed.
1. Put RUN/HOLD toggle to HOLD.
2. Push and hold CAL soft key until red light is steady on.
3. Turn center rotary switch to TARGET RATE and set to your desired seeding rate.
4. Turn center rotary switch to METER CAL and enter the calibration number for the crop and slot width
you will be using.(See Page 9.)
5. Turn center rotary switch to TEST SPEED and set the speed you will be planting.(Example: 5.5 mph.)
6. Turn on hydraulics to drive motors. Lower drill openers so the run/hold mercury switch on drill openers
is in run. Turn RUN/HOLD toggle on Drillmaster to RUN. Drive motors should now be operating.
7. Turn center rotary switch to METER RPM and note drill hex seed shaft rpm. Also note if red warning
light on Drillmaster is blinking.
8. Refer to chart of sprockets and shaft RPM shown below. The red warning light blinking indicates the
drive motors could not run fast enough to achieve the desired TARGET RATE. Compare the sprockets
currently on the drill box end (SEE PAGE 13) with the sprockets listed in the table below. If the
METER RPM noted during Step #7 is near the maximum motor speed for that sprocket combination
then move down the sprocket chart to the next combination of sprockets, install these sprockets on the
drill drive, rerun the above test and repeat the process until an acceptable motor speed is achieved.
SPROCKETS ON END OF DRILL HEX SEED SHAFT SPEED-MIN. and Max.
Jackshaft
Sprocket-C
Sprocket on
Hex Seed Shaft-D
Minimum 45 RPM
Motor Speed
Maximum 405 RPM
Motor Speed
17 Tooth 44 Tooth 6 55
17 Tooth 30 Tooth 9 81
30 Tooth 44 Tooth 11 97
25 Tooth 30 Tooth 13 118
30 Tooth 25 Tooth 19 171
44 Tooth 30 Tooth 23 209
30 Tooth 17 Tooth 28 249
44 Tooth 17 Tooth 42 374
9. You should now have the proper sprocket combination to run an accurate calibration process.
CrustBuster
DrillMaster Quick Start Guide
346-001150 Pg 10 Revised 11/2010
<<Most common
sprocket ratio.
<<Sprocket Ratio
used for high soybean
rates.