Veris Technologies Precision Rate Controller - Operation Manual - Manual (Page 25)

Pub.# OM17-PRC
8-3
Drive rotates but not at desired speed:
6. Drive (out rate) fluctuating erratically
6.1) If indicated field speed on drive is also fluctuating erratically, trouble-shoot
speed signal loop
6.2) If field speed is steady, check for loose set screws on motor encoder,
contamination of proportional valve, or mechanical binding of chain on row unit
7. Indicated speed fluctuating erratically.
7.1) Use speed simulator to troubleshoot speed loop. Leave tractor stationary
and drive hydraulics do not need to be engaged. If steady speed between 4-10
mph appears on cab console using speed simulator, troubleshoot radar, wheel
pickup sensor, hall effect module. If steady speed does not appear with speed
simulator, external controller may need replacement. Call Service Department.
7.2) Check radar gun angle
7.3) Check gap between wheel sensor and pickup plate
7.4) Check power to system < 12 volt power will cause drive to behave
erratically
—often problem manifests itself in speed loop
8. Drive shuts off while planting
8.1) If it occurs after 20 seconds of not planting, such as turning on headlands,
operation is normal safety shutoff (on units with radar speed signal)
8.2) Check setting of speed signal interrupter switch
—re-position as necessary to
keep actuator from disengaging while planting
8.3) 1.5 second delay shutting off drive
—causes: chain binding, inadequate
hydraulics
9. Drive will not achieve desired rate:
9.1) Re-check calibration number, and re-run calibration procedure if necessary
9.2) Check to make sure that your desired rate is within the range of the meter
that is installed.
9.3) Inadequate hydraulic flow. Adjust flow control to higher position. Check with
flow meter if flow is suspect.
9.4) Field speed too high. Check maximum planting rate in seed chart for rate
that you are planting.
9.5) Check sprocket combinations; see Assembly and Parts Manuals for the
planter you are operating (30P and 40P models)
9.6) Check speed shown on cab console against other speedometer
—tractor,
planter monitor. If drive speed is significantly lower, recalibrate speed on drive.