Set up AgOpenWeb from your measures

A calculator, not part of AgOpenWeb: type the tractor and implement measures and it suggests the U-turn, headland and tramline settings to put in AgOpenWeb, with the reasons behind an arrow, using the same rules its U-turn code uses. A starting point for the Vehicle & Tool page, not a replacement for a test in the field.

Tractor

Implement

Machine

Typethe steering is different in each

Wheelbase (m)front axle to rear axle

Maximum steering angle (°)the front wheels on the stop, what the steer wizard measured

Front overhang (m)front axle to the nose, weights included

Rear track width (m)centre to centre of the rear tyres: the Vehicle page's track width. With the tyre width it gives the machine's width, whose front corner sweeps wider than its centre line

Rear tyre width (m)0.65 for a 650/65 R38, 0.54 for a 540/65 R34

Rear wheel height (m)its diameter: 1.8 for a 650/65 R38, 1.9 for a 650/65 R42, 1.57 for a 540/65 R34

Drawbar height (m)the hitch pin above the ground, 0.35 to 0.55 m on most tractors: the tyre is shorter there than at its axle; 0 = count the whole wheel

Safety margin to the field edge (m)room between what sweeps the widest in the turn and the boundary; more where the edge is irregular

Implement

Typeas on AgOpenWeb's Tool page

Sectionsand their width: together they make the working width

Section width (cm)

Working width (m)sections × section width; type it directly if the sections differ

Overlap / gap (m)0 for a sprayer or a seed drill; a gap is negative

Tool offset (m)the working line's centre right of the machine's; left is negative

Rear axle to the working line (m)the boom, the discs, the rows

Rear axle to the hitch (m)the 3-point hitch, the drawbar pin (often inside the rear tyres' back edge) or a semi-mounted implement's pivot (further back): the Vehicle page's hitch length

Tank trailing hitch (m)hitch pin to the tank's axle

Trailing hitch (m)hitch pin (or pivot) to the implement's wheels; with two axles close together, to the middle between them

Drawbar width (m)its widest in the first metre behind the hitch, where it can reach the rear tyres

Most the drawbar may turn (°)to each side, against the tractor: a semi-mounted pivot's stop (half its whole swing), or what you know your drawbar takes; 0 = from the rear tyres only

Swing in the turn (°)a centre-pivot implement, such as a mower: how far you swing it against its drawbar in the turn, so the drawbar folds less; 0 = held straight

Room kept before it touches (°)the turn's circle folds the drawbar this much less than the angle where it touches a tyre or its stop: 5° is about 5 to 8 cm at the tyre

Pivot distance (m)the implement's wheels to the working line; behind them = positive, ahead (wheels at the back) = negative

Implement length (m)from its attachment (the 3-point hitch, or its own axle when trailed) to its rearmost point; 0 = not known

Sprayer width for tramlines (m)0 = no tramline check

Suggested settings

Setting	Suggested

Every turn AgOpenWeb can make here, the smallest headland first

Pick one: the rows above and the drawing follow it. Skipped passes are worked on the way back; a plough skips none.

	Turn	Depth	Distance from boundary	Headland

Not geometry, so not suggested here: the section timing (look ahead on and off: the time the valves take, measured with a stopwatch), the steering gains, the look-ahead of the guidance, the U-turn compensation and the antenna and IMU positions. The U-turn radius keeps the steering 20 % off its stop; AgOpenWeb's simple turn path goes no tighter than 4 m. The distance from boundary keeps what sweeps the widest (the outer corner of the tractor's nose or the implement's outer end) the safety margin inside the field edge (1 m by default; more where the edge is irregular); with a hard boundary AgOpenWeb checks the implement itself and pulls the turn further in.