MacDon M155 Operators Manual - Manual (Page 252)

OPERATION
2. Set HEADER INDEX switch (B) to OFF.
3. Press DISPLAY SELECTOR (E) to display at (A) DRAPER SPEED.
4. On cab display module (CDM) press FAST (C) or SLOW (D) until desired draper speed is displayed at (A).
Display shows ##.# DRAPER SPEED.
##.# = MPH or KPH
4.6.8 Knife Speed
The ideal cutting speed of the knife should be such that a clean cut is achieved. Crop types and conditions
usually influence the knife and forward speeds. Refer to the header operator’s manual for more information
on knife speeds.
Table 4.1 D-Series Knife Speed
Header Description Knife Speed
Minimum Maximum
Type Size (ft)
rpm 16 spm 17 rpm 16 spm 17
15 750 1500 950 1900
20 and 25 700 1400 850 1700
30 800 1600
Draper DK
35 700 1400
20 and 25 750 1500
30
600 1200
Draper SK
35 550 1100
700 1400
The windrower control module (WCM) reads a code from the header that determines the knife speed range and the
minimum speed when the header is first attached to the windrower.
The desired speed can be programmed on the cab display module (CDM) and is stored in the WCM memory so that
if the header is detached and then reattached to the windrower, the knife will operate at the original set-point.
If no header code is detected, the CDM displays NO HEADER, the knife speed reverts to a range from 800–1000
strokes per minute and you can then preset the speed.
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 specified for each header.
16. Revolutions per minute - Speed of knife drive box pulley
17. Strokes per minute of knife (rpm x 2)
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