DT SWISS F 535 ONE Technical Manual page 7

COMPRESSION - FUNCTION IN DETAIL
C
OPEN 2
OPEN 1
DRIVE
LOCK
LSC HSC
figure 1: Compression - function in detail
When the fork compresses, the piston inside the oil chamber is pushed upwards. Some of the oil passes through a one way
valve past the piston (see figure 1) into the lower part of the oil chamber. Thus the volume beneath the piston is smaller than
above, only part of the displaced oil can flow into the space beneath the piston. This excess oil is pushed through the damping
circuit into the upper part of the damping unit. The preloaded floating piston creates a counter pressure to the inflowing oil.
Low Speed Compression (LSC)
In the «OPEN» mode the oil flows through the oil channel of the low-speed compression (LSC) and thus over the adjusting
needle, which position can be adjusted with the external compression adjuster (see figure 1/OPEN 1). The position of the
adjusting needle controls the flow resistance of the oil and thus the intensity of damping. The higher the flow resistance, the
higher the damping.
The oil flows through the channel of the low-speed compression into an area where the oil presses a preloaded piston
downwards (see figure 1/OPEN 1). The piston can be pressed down until the oil channel of the incoming oil is closed by a
sliding bushing. From this position, the oil can only flow through the channels of the high speed compression (see figure 1/
OPEN 2). This function gives the suspension fork its characteristic property: The damping responds very sensitively over the
first third of the travel. After exceeding the first third of the spring travel, the damping becomes firmer and thus prevents too
rapid and deep immersion in the travel.
F 535 - technical manual 7