MacDon M1240, Operator'S Manual

Page: 220 / 488

OPERATION
4.6.7 Knife Speed
The ideal cutting speed of the knife should achieve a clean cut. Crop types and conditions usually in fl uence
the knife and forward speeds.
Table 4.4 Knife Speed Table
Header Description Knife Speed
Minimum Maximum
Type Size (feet)
rpm 5 spm 6 rpm 5 spm 6
25 700 1400 850 1700
30 600 1200 800 1600
35 600 1200
40
Draper with
double knife
45
550 1100
700 1400
When the header is fi rst attached to the windrower, the Harvest Performance Tracker (HPT) receives a code from
the header that determines the knife speed range and the minimum speed.
The desired speed can be programmed and stored in the HPT so the knife will operate at the original set-point after
the header is detached and reattached to the windrower.
Refer to the header operator’s manual for the suggested knife speed for a variety of crops and conditions.
NOTE:
The knife speed cannot be programmed outside the range speci fi ed for each header.
Setting Knife Speed
Knife speed is displayed in strokes per minute (spm).
CAUTION
Check to be sure all bystanders have cleared the area.
1. If RUN SCREEN 1 is not already displayed, press soft
key 1 (A) on the Harvest Performance Tracker (HPT)
to display draper RUN SCREEN 1.
Figure 4.218: Header Run Screen 1
5. Revolutions per minute is the speed of knife drive box pulley
6. Strokes per minute of knife (rpm x 2)
214053
208
Revision A