Makita DTD171 Instruction Manual

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12 ENGLISHChanging the impact forceYou can change the impact force in four steps: max,hard, medium, and soft.This allows a tightening suitable to the work.The level of impact force changes every time you pressthe button or the quick mode-switching button.You can change the impact force within approximatelyone minute after releasing the switch trigger or press-ing the button , , or the quick mode-switchingbutton.► Fig.9: 1. ButtonApplication mode(Impact force gradedisplayed on panel)Maximum blows Purpose Example of applicationMax 3,800 min -1 (/min) Tightening with the maximum forceand speed.Driving screws to underwork materi-als, tightening long screws or bolts.Hard 3,600 min -1 (/min) Tightening with less force and speedthan Max mode (easier to control thanMax mode).Driving screws to underwork materi-als, tightening bolts.Medium 2,600 min -1 (/min) Tightening when a good finishing isneeded.Driving screws to finishing boards orplaster boards.Soft 1,100 min -1 (/min) Tightening with less force to avoidscrew thread breakage.Tightening sash screws or smallscrews such as M6.NOTE: When none of the lamp on the panel is lit, pull the switch trigger once before pressing the button or thequick mode-switching button.NOTE: All lamps on the switch panel go out when the tool is turned off to save the battery power. The impact forcegrade can be checked by pulling the switch trigger to the extent that the tool does not operate.Changing assist typeThis tool employs assist function that offers severaleasy-to-use application modes for driving screws withgood control.The type of the application mode changes every timeyou press the button .You can change the assist type within approximatelyone minute after releasing the switch trigger or press-ing the button , , or the quick mode-switchingbutton.► Fig.10: 1. ButtonApplication mode(Assist type displayedon panel)Maximum blows Feature PurposeWood mode *1 3,800 min -1 (/min) This mode helps to prevent a screw from falling atthe beginning of driving. The tool drives a screwwith low-speed rotation at first. After the tool startsto impact, the rotation speed increases and reachesthe maximum speed.Tightening long screws.Bolt mode (reverse rota-tion auto stop) *1 *23,800 min -1 (/min) This mode helps to prevent a bolt from falling off.When loosening a bolt with the tool driving in coun-terclockwise rotation, the tool automatically stopsafter the bolt/nut gets enough loosened. The strokeof the switch trigger to reach maximum speed willbecome short in this mode.Loosening bolts.