The Leica Builder is an integrated part of the L3D prefab system

L3D prefab.

L3D Prefab is a complete system for producing CAD-templates. With L3D you can all in one measure, draw and deliver templates for the production og building elements. L3D is used for a wide range of tasks: tabletops, cabinets, balconies, -even for the fitting of sailboats. With L3D you get a flexible, high performance system where quality is second to none.
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The L3D system comprises:
  • 1 Builder 509 total station
  • 1 GST05 tripod
  • 1 GEV102 Data cable
  • 2 GEB121 Internal battery
  • 1 GKL112 Basic charger
  • 1 Battery adapter
  • 1 Tripod base
  • 1 L3D prefab license
L3D prefab runs on all commonly used windows platforms.


Insert installation disc and install L3Dprefab.msi.

Check that a connection is established to the Bluetooth transmitter. Follow the separate instructions concerning the PC Bluetooth-driver. Read the Bluetooth COM port number. Check that the Bluetooth connection is established without security code.
Start L3Dprefab. Click on Indstillinger -Settings. Enter correct COM port name. Click Update.
The system is now ready for use.


Start L3D prefab and click on Indstillinger -Settings.
Check that the following values are as requested:
  • COM port: Bluetooth-COM port name, e.g. "COM6".
  • Maximum deviation from surface (mm): Maximum allowed distance between a measured point and the wall. If the distance is exceeded.
  • Database library: The path to the library, in which documentation and drawings are saved.
  • Offset from wall (mm): Joint clearance between the wall and worktop.
  • Accuracy (mm): Maximum allowed deviation when calculating the set-up points.
  • Instrument: Instrument name. Choose from list.
  • Clean edges: Set the tolerance used for the automatic clean-up function.
  • Text height: Height of texts and dimensions in mm.
  • Language: Choose from the list.
Carry out this check before using the system for the first time and every time a new user is to operate the system and when making changes in the system.



  • Start the L3Dprefab program and enter order ID:

  • If necessary place reflective marking on all the points to be measured. Place at least three control points. Place control points so they surround the area to be measured. Also place the control points at a reasonable distance from the instrument. On porous surfaces place masking tape beneath the reflective markings

    Place a minimum of two measuring points on each wall. If possible, place the measuring points at each end of the wall. Place the measuring points at the same height as that of the future worktop position. Place measuring points at a maximum distance of one meter.

    If the wall is not completely straight, place additional measuring points between the other points.
    When measuring to pipes, measure to the pipe centre (enter pipe dimensions during measuring).
    Avoid very acute angles, if possible. Never measure at angles below 15 degrees. If there are edges that cannot be measured directly, mount a lath flush with the wall and measure it to the positioned masking tape. The lath can be mounted using double sided adhesive tape. Only use this method on short edges below approx. 25cm.

  • Set up the instrument and switch on. Connect to the Bluetooth transmitter.
  • Adjust base screws to obtain a horizontal position. Check the tubular levels, which should be centred even if the instrument is turned 90 degrees. Place the instrument tripod on a stable base. In flats with soft flooring, the service operator should not move during measuring.

  • Click on Indstillinger -Measure:

  • -Follow the on-screen guide.

  • Measure a minimum of two control points. If you return to a control point, make sure to insert the right number:

  • Measure a height reference, this could be the floor or a socket. Select floor-level. If the reference is out of sight, off-set the point and insert the off-set distance. A minimum of 1 height reference is mandatory:

  • Measure the walls. Measure the walls in a natural sequence placing a minimum of two points on each wall. Be aware that seemingly straight walls can have huges fluctuations. To optimize precisionon long walls additional points should be measured along it. Be sure to measure at the right hight.
    Mutiple floors can be measured in the same sequence. To start a new sequence of walls click -Ny wall:

  • Measure profiles. First measure two basepoints to define a referencelinie. Select if the profile should be perpendicular to og parallel with the base-line. This can be changed by clicking on -New Profile. Select objedt-type in the list. Start new objects by
    -choosing a new object in the list.
    -clicking on -New Line
    -clicking on -Close polygon, that closes the active object
    You can draw multiple profiles from the same base-line, by clicking -New profile. You can draw profiles from a new base-line by clicking on -New wall:

  • Measure detailes. Choose between different object-types from the list. Depending on the type selected, you will measure
    When measuring pipes, you should aim at the middle of the pipe. then enter the outer dimension of the pipe. The method is only sufficient on vertical pipes.

  • At the end of the wizard, you can either end measuring or continue to a -New set-up:

  • If -New set-up is choosen, you can continue measuring from a new position. Be aware that the first two fixpoints must be known points from previous positions.
    If you choose -End measurement you continue to: Validate fixpoints. Then measure at least one known fixpoint.
    In both opportunities the L3D wil validate, if the measurement still satisfies your demands on theaccuracy. If L3D encounters to huge errors, it will delete all data from the last accepted control of fixpoints.
    Hvis der er for store fejl, slettes alle mål siden sidste godkendte kontrol.

  • The measurement is now done. But you can return an continue at any time, as long as you start by measuring to known fixpoints.
  • Home


    After measuring use the draw-panel to finish your template.
    The draw-panel contains a variety of tools:

    - Draw-tools to draw and edit templates, dimensions etc.:

    - Suppport-tools, that ease the use of the draw-tools:

    - and -Layercontrol, that defines the object-type of the new drawing entities:

    In addition there is a number of special tools in the top panel, -offset of the back edge and front edge of your template, and -Clean edges, which will correct construction-errors like mismatching line-ends and overlapping lines. This function is born to make the template ready for use in CNC-tools etc.:


    Postprocessing, Step-bystep

    1. Select active layer in -Layercontrol and draw the templates rear edges:
    2. Hide measurements:
    3. Draw the front edges:
    4. Draw the end pieces of the template by using the off-set tool:
    5. Trim all edges:
    6. split edges, if they change type:
    7. Add dimensions:
    8. Rotate all: , activate polaer lock and add main dimensions:
    9. Validate dimensions with a disto or a folding rule.
    10. Clean edges:
    11. Add details like rounded corners:
    12. Save the template:
    13. The template is now ready to go on to your workshop:

    Attention! You should always validate main dimensions and critical edges. Critical edges are:

    • Edges that was measured at a very narrow angle.
    • Edges that has been moved out (that was not visible from the instrument).
    • Edges designed based on dimension measurements.
    • Edges with a risk of reflection from glossy surfaces nearby.

    Be carefull to use correct layer when drawing.


    Postprocessing, all functions:

    • Draw. Redraws the entire drawing and reestablishes every measured object:
    • Offset rear edge. Draw the worktop rear edge. Click to choose a wall; click the side on which the worktop is to be positioned:
    • Offset front edge. Draw the worktop front edge. Click two reference points; right click; click the side on which the front edge is to be positioned:
    • Clean edges. Erase doubletts and spikes, inserts breakpoints and snaps all lines:
    • Hide/Show measurement. Hides or shows the measured objects:
    • Hide/Show profiles. Hides or shows the measured profiles:
    • Zoom all. Shows the entire drawing without redraw:
    • Layer control. Advanced layer control:
    • Redo. Restore the last change to the drawing:
    • Undo. Abort the last change to the drawing:
    • Print. Prints the drawing as it is shown on the screen:
    • Point. Draw a new point. Click desired position:
    • > Circle. Insert diameter and click centerpoint. If the diameter is set to 0, you must click in the drawing to define the radius:
    • Arc. Click three points on the arc: Start, midpoint, end:
    • Text. Enter text. Click start point; click to indicate direction; write text; right click:
    • Fixed Line. Draw a new line with fixed length and/or angle:
    • Line. Draw a new line. Click start point; click end point; right click:
    • Delete. Delete object(s). Click one or more objects; right click:
    • Dimension. Enters dimensions. Click start point; click end point; click to place. Please notice, that when Polar lock is on, this tool will add two dimensions: First a horisontal and then a vertical dimension:
    • Angle. Enter angular dimensions. Click angle; click first direction; click second direction; click to place:
    • Radius. Enters radiuses on arcs and circles. Click arc or circle; click to place:
    • Cut. Cut two lines against each other. Click the first line; click the second line:
    • Fillet edges. Insert radius; select two lines:
    • Trim. Reduce one line to another. Click the line/lines to which the line is to be reduced; right click; click the line/lines that are to be reduced; right click. Always click the side that is to be removed:
    • Extend. Extend one line to another. Click the line/lines to which the line is to be extended; right click; click the line/lines that are to be extended; right click:
    • Copy. Click one or more objects; right click; click to indicate start point; click to indicate end point:
    • Move. Click one or more objects; right click; click to indicate start point; click to indicate end point:
    • Rotate. Rotate object. Enter angle; click one or more objects; right click; click centre rotation. If the angle is not entered, subsequently point out an angle in the drawing:
    • Rotate all. Rotates everything. Select start-point and end-point of new base-line. This is used together with the polar lock to insert the main dimensions of each table-top:
    • Offset. Copy a line. Enter distance; click line; click desired direction of displacement. If entering 0 as the distance, subsequently mark the distance in the drawing:
    • Mirror. Select object(s) and right-click. Select start-point and end-point of mirrorline:
    • Split. Break up line. Click the line; click to indicate break-up start point; click end point; right click:
    • Change signature. Click one or more objects; right click. Ensure that the edge type, and if necessary, the layer name are adjusted correctly before choosing the tool:
    • Front edge. Draws an "X" on the edge:
    • Fillet. Draws a "Δ" on the edge:
    • List edge. Draws an "O" on the edge:
    • The following tools are support tools, that works with the drawing tools:

    • Change back color. Changes the drawing back color between black and white:
    • Polar snap. Locks the drawing tools to fixed angles with an interval of 45 degrees:
    • Zoom. Draw rectangle to indicate zoom-section:
    • Snap. Locks the cursor on: any point and node: intersections: Tangents: points perpendicular to lines:
    • Layercontrol. Sets the active drawing layer:
    • In addition you can use the spacebar or right-click to repeat the last used function, and the scroll-wheel can be used to zoom in and out.



    If the total station has been exposed to damp conditions, wipe the instruments with a dry cloth and place in an OPEN instrument box.

    If the total station has been exposed to dust, dirt etc., wipe the instruments with a firmly wrung cloth. Keep the lenses clean at all time during operation.

    Always keep the total station and laptop in a dry and warm place. Always leave the instrument box open when storing.

    After use, leave the instrument batteries, laptop and Bluetooth to recharge.



    The system depends on the optimum function of the total station.
    Therefore always perform a self-check of the instrument six times per year. We also recommend that the instrument be sent for service at the supplier once a year.
    If the instrument has been exposed to bumps or other kinds of strain, a self-check should be carried out as a minimum.

    The self-check includes the following routines:

  • Set up the instrument on a tripod on a stable base. Carefully adjust the instrument horizontally. Turn the instrument through 200gon. Check that the levels are still horizontal.
  • Carefully adjust the sight to a control point placed at a distance of minimum 10m. Reset the horizontal axis (Hz=0) and note the vertical axis (V1). Turn the instrument through 200gon; and readjust the sight at the control point. Hz should now be 200.000gon and V should be = (400.000gon V1). Deviations of +/- 0.005gon are acceptable. Start the program and measure two known control points. Measure the distance between the control points using the dim-tool. Check that the distance is as expected. Variations of +/- 1mm are acceptable.
  • If one or more routines show errors, repeat the check. If it is not possible to achieve a satisfactory result, the instrument should be sent to the supplier for service.



    If it is not possible to establish connection to the total station, the reason may be:

  • Bluetooth transmitter is not adjusted correctly.
    Adjust the transmitter to the following values (follow separate manual)
    Baud rate: 9600
    Data bit: 8
    Parity: None
    Stop bit: 1
    -follow separate manual
  • Bluetooth transmitter is not activated on laptop
    Start the Bluetooth administration program and activate connection.
    If this does not work, restart the laptop.
    tart PC'en
  • Bluetooth transmitter is switched off
    Switch on the transmitter (plug in charging connector in the transmitter).
    If necessary connect to external power supply.
  • The total station is not adjusted correctly
    Set the total station to external communication with the following values:
    Baud rate: 9600
    Data bit: 8
    Parity: None
    Stop bit: 1
    -Follow the total station manual.
  • In case of other errors, contact the system-manager.