MikroGrader - Mikrofyn - (Version JPG) - Page n° 2 - PDF Catalogue | Technical Documentation



The MikroGrader, a versatile solution - made for your benefit				CROSS-SLOPE In order to maximise productivity and make the MikroGrader system as user-friendly as possible, the most commonly used functions can be performed using the two Multi Switches, which are mounted directly on the existing control handles. Each Multi Switch has three control buttons. Two buttons on the front raise and lower the value for cross-slope and blade elevation, while the side button activates the Auto Mode.		SONIC TRACKER
The MikroGrader system has been developed to automate the control of cross-slope and blade elevation during your grading work. The MikroGrader system consists of a varying number of units according to your needs and requests. You can choose to let the MikroGrader system control only the cross-slope or both cross- slope and blade elevation. To control the cross-slope, the MikroGrader uses three sensors. A cross-slope sensor mounted on the blade, a rotation sensor mounted in the centre of rotation of the blade and a main fall sensor mounted on the body of the grader. The sensors continuously monitor the cross-slope of the blade, rotation of the blade and the inclination of the grader itself, respectively. The information is digitally sent via the control box to the hydraulic box, which makes the necessary adjustments to the blade, to ensure that the blade always works with the desired cross-slope. To control the blade elevation, the MikroGrader uses either a sonic tracker or a laser sensor.	The sonic tracker is mounted on the end of the blade and continuously controls the blade elevation in relation to a reference line. The reference line can, for example, be a string line or a previously graded surface. The laser sensor is mounted on a mast that enables the sensor to receive the laser beam. The MikroGrader system has been developed to work with either one or two electric masts. Features • Prepared for 3D-MC/GPS control. • Easy to use, one button control. • Can form an integral part of any grader. • The main functions can be performed using special control buttons mounted directly on the existing control handles. • All the connections are made using a CAN bus based system, which makes it very easy to connect the units to the Control Box. • Very sturdy and 100% waterproof sensors. • Very easy-to-read LCD display shows current status, 3D-MC/GPS control, error information and diagnosis for trouble shooting. • Very bright LED displays show cross-slope direction, blade elevation and laser mode.					Using ultra-sound to follow a reference line is a very flexible way to control the blade elevation. The reference line can be a string line, a curb, the surface of a previous pass or a completed work. In most cases you want the blade elevation to be controlled on one side of the control box and the cross-slope on the other side.
						i.	THIS IS HOW EASILY YOU CONTROL SONIC TRACKER 1. Push the input selection button to select sonic tracker.
			THIS IS HOW EASILY YOU CONTROL CROSS-SLOPE 1. Push the input selection button to select cross-slope. 2. Set the required cross-slope by turning the Set Knob. An even easier way is to push the up/down buttons on the Multi Switches. 3. Put the MikroGrader in Auto Mode by using the Multi Switch.
						2. Place the blade at the desired height above the string or surface.
						4a. i	3. Put the MikroGrader in Survey Mode by pushing both the up/down buttons on the Multi Switch once simultaneously. 4. Put the MikroGrader in Auto Mode by using the Multi Switch. The MikroGrader has now learnt the current height and uses it as the new reference.	ADVANTAGES OF OUR SONIC TRACKER
			jMD2, MACHINE DETECTOR		4. When you want to turn the grader 180°, you will also have to change the sign for cross-slope. This is simply done by pushing the sign button or, even easier, by pushing all 4 buttons on the Multi Switches simultaneously. SETTING THE MIKROGRADER IN SURVEY MODE 1. Push both the up/down buttons on the Multi Switch once simultaneously. 2. Lower the blade until it is on the surface. The current values for cross-slope and sonic tracker will be shown in the upper displays. 3. If you want to work with the current values for cross-slope and sonic tracker, just put the MikroGrader in Auto Mode. The current values will be stored and used as the new setting. THIS IS HOW THE CROSS-SLOPE WORKS The cross-slope of the blade is calculated by knowing the exact angle of the blade in relation to three parameters: The blade rotation, the inclination of the grader itself and the actual slope of the blade. In order to obtain information about these angles, the MikroGrader is equipped with three sensors: a rotation sensor, a main fall sensor (built into the junction box) and a cross-slope sensor.
						THIS IS HOW THE SONIC TRACKER WORKS As sound moves at a velocity of about 300 metres per second, it is possible to calculate a distance by measuring the time that a reflected sound pulse needs to return to its point of departure. The MikroGrader measures this time with a precision of 0.000000125 second. To compensate for deviation due to changes in air temperature, our Sonic Tracker is equipped with a temperature bail that functions as a reference when the MikroGrader makes the necessary calculations.
			fa					Our Sonic Tracker differs from most other sonic trackers by using a high transmitting frequency of 200 kHz, where the standard frequency is 50 kHz. The high transmitting frequency enables our Sonic Tracker to work with a short dual reflective wavelength of 0.75 mm, which results in a much higher basic precision than most other sonic trackers that work with a dual reflective wavelength of 3 mm. The design of the Sonic Tracker is very small, and is based on a piezoceramic transmitter, which is very sturdy and washable with water or diesel.
The control box CB4 features a very user friendly design.
The CB4 is built to be strong, sturdy and very easy to operate. The control box consists of five easy-to- use function buttons, two controls for setting the desired values for cross-slope and blade elevation, and three easy-to-read displays. Two LED displays show the values for cross-slope and blade elevation, whilst an LCD display is used to show the current status, such as the selected function, 3D control, error information and diagnosis for trouble shooting. Its compact design makes the control box very easy to mount in a place, where it is both visible to, and within reach of, the operator.	The main functions, such as setting the cross-slope and blade elevation, turning the system into Auto or Survey Mode, changing the sign for cross-slope, can be performed using special control buttons mounted directly on the existing control handles. [ This way the operator does not have to let go of the control handles to set cross-slope and blade elevation. All these features have been developed to make your grading more accurate, efficient, time saving and last but not least cost saving.
						BLADE ROTATION
						LASER CONTROL
						The MikroGrader has been developed to work with either one or two laser detectors. When working with two detectors, both the cross-slope and the blade elevation are controlled using a rotation laser like MIKROLASER ML4 as reference.		THIS IS HOW THE LASER CONTROL WORKS
								An ordinary machine detector (MD 2) is integrated with an electronic mast, which moves the detector up and down. The detector transforms a signal pattern from its receiving diodes to correction signals. This information is sent to the Control Box (CB 4), which calculates correction information to control the hydraulics. The entire process is done in less than 1/1000 sec.
RS4, ROTATION SENSOR		ADVANTAGES OF OUR CROSS-SLOPE CONTROL				INCLINATION OF THE GRADER	THIS IS HOWYOU CONTROL THE BLADE ELEVATION
		Both the cross-slope sensor and the main fall sensor are based on our unique inclination sensor.This sensor is well known from our MikroDigger product range, where it has proven to be very sturdy, even under extreme working conditions. Our inclination sensor also has a considerably faster reaction time than the traditional liquid-based sensors, and eliminates any tendency for fluctuations.					1. Push the input selection button to select Laser Mode. 2. Place the blade at the desired height above the surface. 3. Put the MikroGrader in Survey Mode by pushing both the up/ down buttons on the Multi Switch _ once simultaneously. The laser detector automatically detects the laser beam. 4. Put the MikroGrader in Auto Mode. The MikroGrader has now learnt the current height and uses it as the new reference. To optimise ease-of-use, you can both zero set and pre-adjust the height when working in Laser Mode.
								ADVANTAGES OF OUR LASER CONTROL
						SLOPE OF THE BLADE		The MD 2 Machine Detector that we use for the MikroGrader is one of our most tried and tested products. It has now been on the market for more than a decade. The electronic mast EM1 is of a lightweight construction that is based on reputable and well-tested industrial components, which in combination with a rigid rubber suspension, guarantee you an instrument of both good quality and high durability. To ensure a high level of portability, the size and weight of the EM1 are kept to a minimum. The combined mast and sensor fit easily into the luggage compartment of a car.
		CALIBRATION
JB4, JUNCTION BOX					To ensure maximum precision of the MikroGrader, you will have to calibrate the cross-slope sensor from time to time. This is not due to any deviation of the sensor, but wear and tear of the grader. The calibration is very simple and easily done by following the user-friendly step-by-step instructions, which are shown clearly on the bright 2 x 16-character LCD display during the calibration process.

CB4, CONTROL BOX	XIS1, INCLINATION SENSOR

MikroGrader - Mikrofyn - #2

Machine control system, Level, Laser receiver, Rotating laser, Grade laser