A method for controlling a device system (10) having a saw blade (14) that is attached to a saw arm (15) and that can be moved along an advancing direction (26) by a motor-driven advancing mechanism (13), whereby there is an infeed motion of the saw arm (15) with the saw blade (14) into the workpiece (18) and, during the infeed motion of the saw arm (15) into the workpiece (18), a control unit (27) calculates an arc length (φ) of the saw blade (14) that is engaged with the workpiece (18), and the calculated arc length (φ) is compared to a pre-set, critical arc length (φ.sub.crit) of the saw blade (14).

A bollard drilling jig including a base plate, an elongated bar coupled to the base plate, and at least two guide collars spaced apart from each other on the elongated bar. The at least two guide collars each include an interior channel that is sized to receive a drilling tool therethrough.

A method for controlling a wall saw system during the creation of a separating cut in a workpiece. The movement of the saw head is controlled at the end points such that a boundary of the wall saw facing the end point coincides with the end point after the pivoting movement of the saw arm. In the case of a free end point, the boundary of the wall saw is formed by an upper exit point of the saw blade. In the case of an obstacle, the boundary of the wall saw is formed by the saw blade edge of the saw blade if the processing occurs without the blade guard or by the blade guard edge of the blade guard if the processing occurs with the blade guard.

A spacer (1) for spacing a tool such as a drill motor from a tool stand such as a drill stand, the spacer (1) comprising a spacer body (2) and a locking member (3), the spacer body (2) having first (4) and second (5) opposing faces, the locking member (3) extending from a first end (6) thereof adjacent to the first face (4) to a second end (7) thereof adjacent to the second face (5), the locking member (3) being able to slide relative to the spacer body(2) along a direction from the first end (6) to the second end (7), the first end (6) and the second end (7) each being provided with at least one locking surface(10, 11), wherein the spacer (1) is arranged such that at application of a locking force each locking surface (10, 11) of one of the first and second ends (6, 7) transmits the locking force to each locking surface (10,11) of the other of the first and second ends (6, 7).

A spacer (1) for spacing a tool such as a drill motor from a tool stand such as a drill stand, the spacer (1) comprising a spacer body (2) and a locking member (3), the spacer body (2) having first (4) and second (5) opposing faces, the locking member (3) extending from a first end (6) thereof adjacent to the first face (4) to a second end (7) thereof adjacent to the second face (5), the locking member (3) being able to slide relative to the spacer body(2) along a direction from the first end (6) to the second end (7), the first end (6) and the second end (7) each being provided with at least one locking surface(10, 11), wherein the spacer (1) is arranged such that at application of a locking force each locking surface (10, 11) of one of the first and second ends (6, 7) transmits the locking force to each locking surface (10,11) of the other of the first and second ends (6, 7).

A method for controlling a wall system when creating a separating cut in a workpiece between a first and a second end point is disclosed. The wall saw system includes a wall saw having a saw head, a pivotable saw arm, a saw blade and a blade guard. The separating cut is carried out in a plurality of main cuts. The pivoting movement of the saw arm in a main cutting angle is carried out in at least two steps with at least one intermediate angle, where a free cut of the saw blade is carried out in the respective intermediate angle between the pivoting movements of the saw arm.

The present invention relates to a ground sawing machine comprising a frame supported by rear wheels (34a, 34b) and front wheels (36a, 36b) arranged for moving the ground sawing machine over a surface (38). At least one motor (40, 6) and a saw blade (2) are mounted to the frame, at least one motor (40) being arranged to propel the saw blade (2) to cut against the surface (38). The pointing direction (80) relative the surface (38) of the rear wheels (34a, 34b) and/or the front wheels (36a, 36b) is adjustable by means of an electrically controlled actuator (56) which is controlled by means of control means (70, 71, 72) arranged to provide at least three different control signals, one for left turn, one for right turn and one for center. The control signal for left turn and right turn are arranged for adjusting the pointing direction (80) of the adjustable wheels (34a, 34b) correspondingly, and the control signal for center is arranged for adjusting the pointing direction (80) of the adjustable wheels (34a, 34b) to a predetermined value.

A method for controlling a wall saw system during creation of a separation cut in a workpiece between a first and second end point, where at least one of the end points is defined as an obstacle, is disclosed. The separation cut is carried out in a plurality of main cuts. In addition to a main-cut sequence, a corner-cut sequence having at least two corner cuts is defined for each end point defined as an obstacle. For each corner-cut sequence, a starting position and an end position are defined, the corner cuts being carried out therebetween. The wall saw is positioned in the starting position and is pivoted into a first corner-cut angle. Subsequently, the saw head is moved by way of the inclined saw arm until the end position has been reached. The wall saw is displaced back into the starting position and pivoted into a second corner-cut angle.

A method for controlling a wall saw system during creation of a separating cut in a workpiece between a first and a second end point is disclosed. The separating cut is performed in a plurality of main cuts. The movement of the saw head is controlled at the end points such that a boundary of the wall saw facing the end point coincides with the end point. In the case of a free end point, the boundary of the wall saw is formed by an upper exit point of the saw blade. In the case of an obstacle, the boundary of the wall saw is formed by the saw blade edge of the saw blade if the processing occurs without the blade guard or by the blade guard edge of the blade guard if the processing occurs with the blade guard.

A method for controlling a wall saw system during the creation of a separating cut in a workpiece between a first and a second end point is disclosed. The separating cut is performed in a plurality of main cuts. The movement of the saw head is controlled at the end points such that a boundary of the wall saw facing the end point coincides with the end point after the pivoting movement of the saw arm into the main-cut angle of the following main cut. For a free end point, the boundary of the wall saw is formed by an upper exit point of the saw blade. For an obstacle, the boundary is formed by the saw blade edge of the saw blade if the processing occurs without the blade guard or by the blade guard edge of the blade guard if the processing occurs with the blade guard.