Barber-Colman DYNA 8000 Technical Manual - page 6
Full Load
Engine RPM
No Load
Engine RPM
Adjustable
100%
% of Engine Load
0%
Engine
RPM
NOTE
Mounting information and kits are usually available for
a particular engine. Contact Sales Representative.
4.1.2 Set up the linkage and rod end bearings (see 4.2).
4.1.3 Install the speed sensor with SAE threads (magnetic
pickup)*.
4.1.3.1 Remove the inspection cover over the ring gear teeth.
The teeth should be free of burrs, excessive grease or dirt.
4.1.3.2 The magnetic pickup should not be installed in inspec-
tion covers. Inspect the ring gear housing and pick a location
where a 37/64" hole can be drilled such that the ring gear teeth
will pass in front of the pickup pole face. After the 37/64" hole
is drilled, use a 5/8-18 starting tap to cut threads for the
magnetic pickup, then run a bottom tap through the hole.
4.1.3.3 Manually rotate the ring gear until a tooth face is directly
in the center of the tapped hole. Gently turn the magnetic pickup
clockwise into the hole until it bottoms on the tooth, and back off
1/4 turn. Tighten the jam nut firmly, maintaining the 1/4 turn
position.
*Magnetic pickups with metric threads are available.
Thread — M16 x 1.5 — 6 g. Tap Drill Size — 14.5 0 mm.
NOTE
The tapped hole should be drilled as nearly perpendicular
as possible over the center of the ring gear teeth.
6
Desired
Engine RPM
Isochronous
Operation Mode
Engine
RPM
Engine Load
100%
3.6 DROOP OPERATION
Droop operation is obtained by setting the droop potentiom-
eter. Clockwise increases the droop. The amount of droop for
a given setting depends on the magnetic pickup frequency
and no load to full load actuator shaft rotation. A droop
potentiometer setting of 10 o'clock will give about 4% droop,
no load to full load when the pickup frequency is 4260 Hz and
actuator shaft rotation is approximately 30 degrees from no
load to full load. Lower pickup frequency or smaller shaft
rotation results in less droop for the system.
3.5 ISOCHRONOUS OPERATION
Isochronous operation is obtained by setting droop potentiom-
eter fully counterclockwise. The DYNA governor is all electric,
and it is normally operated in the isochronous mode; i.e.,
engine RPM is constant (
±
0.25%) under steady state load
conditions, up to the engine's maximum capability, regardless
of load on the engine.
3.7 REMOTE SPEED ADJUSTMENT
An optional remote speed selector (DYNS-10000) is available
for adjusting engine RPM from up to 90 meters (300 ft.) from the
engine. See the Electrical Wiring Schematic. The potentiom-
eter can be connected for a narrow (fine) or wide speed range
control.
4. INSTALLATION
4.1 PROCEDURE
4.1.1 Mount the actuator on a suitable rigid steel bracket or
plate.