LP 4000 Support

LP 4000 Support

Ioline LP4000 Wide Format Plotter
Legacy Product · No Longer Active

Tech Bulletins

LP3700 4000 Quick Reference
File: LP_3700_4000-HPGL_Quick_Reference.pdf
LP3700 4000 Custom Page Setup
File: LP_3700_4000-Custom_Page_Setup.pdf
LP3700 4000 HPGL Setup
File: LP_3700_4000-HPGL_Setup.pdf
LP3700 4000 Keypad Memory Reset
File: LP_3700_4000-Keypad_Memory_Reset.pdf
LP Series Cutting Depth Varies
File: LP_Series-Cutting_Depth_Varies.pdf
LP Series Dimensional Calibration
File: LP_Series-Dimensional_Calibration.pdf
LP Series Disable Autoview
File: LP_Series-Disable_Autoview.pdf
LP Series Knife Rubs Cover
File: LP_Series-Knife_Rubs_Cover.pdf
LP Series Offset Adjustment
File: LP_Series-Offset_Adjustment.pdf
LP Series Optical Eye Adjustment
File: LP_Series-Optical_Eye_Adjustment.pdf
LP Series Pen Height Adjustment
File: LP_Series-Pen_Height_Adjustment.pdf
LP Series Pen Plotting Tips
File: LP_Series-Pen_Plotting_Tips.pdf
LP Series Poor Line Quality
File: LP_Series-Poor_Line_Quality.pdf
LP Series Poor Registration
File: LP_Series-Poor_Registration.pdf
LP Series Program User
File: LP_Series-Program_User.pdf
LP Series Registration Shift
File: LP_Series-Registration_Shift.pdf
LP Series ROM Replacement
File: LP_Series-ROM_Replacement.pdf
LP Series Sticking Knife Shaft
File: LP_Series-Sticking_Knife_Shaft.pdf
LP Series Tearing Media
File: LP_Series-Tearing_Of_Media.pdf
LP Series Windows Drivers
File: LP_Series-Windows_Drivers.pdf


LP 4000 User Guide
File: lp_35-4k_ug_r0.pdf
Revision: 0
Posted: February 1, 2001
Size: 3.9 MB
LP 3500, 3700 & 4000 Service Manual
File: lp_35-37-4K_sm_r0.pdf
Revision: 0
Posted: June 21, 2002
Size: 22.9 MB


DOS® Utility
Interface for adjusting plotter parameters.
File: 4000.exe
Version: English
Revision: 0
Posted: May 10, 1999
Size: 114 KB
Install: Copy the file to the PC connected to the plotter and run it by double-clicking on it. Follow the on screen directions to complete the installation.
Legacy Drivers
Software drivers for unsupported Ioline equipment are in the Legacy Software section of the support website under AutoCAD Drivers and Generic Windows Drivers.


Issue: Pen or blade skips, tilts or moves slightly.

There may be side play in the pen holder. To correct, tighten the cone-point bearing screws. Using the Allen wrench provided with the plotter (size 3/32), carefully and equally tighten each screw. The point of each bearing screw should engage the mating hole in the carriage. When properly adjusted, the empty pen holder will fall under its own weight.

CAUTION: Care must be taken not to over tighten, as this will damage the pen carriage.

Cone Point Bearing Screw

Issue: Plot is good at the center but bad at the edges.

The traverse rods could be bent or the carriage is cracked. To check this, turn the round, stainless steel traverse rods manually. When they rotate, does the carriage rise or lower slightly?

Move the carriage to different locations on the rods. Rotate the rods. No matter where you locate the carriage, it should not rise up or lower when you turn the traverse rods. It if does, the rods are bent and need to be replaced.

Plotter calibration (LP4000).

To calibrate means to check against a standard and adjust it for accuracy. Plotters can have variations in drawing accuracy in both the X- and Y-axes, due to variations in the paper drive mechanism, paper density, humidity and temperature. Typically, the accuracy of a plot is within 0.2% overall.

Note: The scale commands operate independently of the micro-calibration resolution.

The calibration is performed as follows:

NOTE: This procedure restores plotter settings to the factory default. If you have any special settings you want to keep, please record the settings before initiating this procedure. You won’t be able to recover them after the keypad memory has been cleared. (Use your plotter’s utility program to view and jot down the settings.)

  • Press the following keys to clear the keypad:

    ALT – UR – DOT – DOT – DOT – ALT – 1 – RESET – ALT – RESET

    Turn the plotter off for about 30 seconds.

  • The X- and Y-calibration values are labeled on a white sticker under the end plates near the plotter keypad. Remove the right end plates and write these values down on a piece of paper. If the label with the calibration settings has been removed, skip to the micro-calibration procedure.
  • Turn the plotter back on and press ALT. After the carriage stops moving, enter the calibration as follows:

    ALT – UR – DOT – DOT – DOT – ALT – SCALE – enter the X value – ORIGIN – enter the Y value – SCALE – ALT – 1 – RESET

    Turn plotter off.

Example: If the X-axis calibration is 40.125 and the Y-axis calibration is 30.001, it must be entered as follows:

ALT – UR – DOT – DOT – DOT – ALT – SCALE – 4 – 0 – ORIGIN – 1- 2- 5 – ORIGIN – 3 – 0 – ORIGIN – 0 – 0 – 1 – SCALE – ALT – 1 – RESET

How to perform a Micro-calibration.

NOTE: When you perform the following sequence on your keypad, the settings on the plotter will default back to factory settings. If you have any special settings you want to keep, please use the Utility Program for your machine and record any information you may need, since you won’t be able to recover them after the keypad memory has been clear.

Press the following keys to clear the keypad:


Turn the plotter off for about 30 seconds.

  1. Load the paper into the plotter. For maximum accuracy, the paper should be the same size and at the same location on the platten as the final intended plot.
  2. Set the lower left (LL) corner, the upper right (UR) corner (or Size).
  3. Press ALT – 4

    The plot is always in the normal orientation—e.g. not affected by rotation settings—with lines drawn from origin (0,0). Two sets of connected lines are drawn: one for measurement in inches and the other in centimeters. At the maximum x and y locations, there are short lines perpendicular to the x and y axes. Pairs of measuring marks for both x and y axes are indicated on the plot in either inches or centimeters. The measurement between the parallel lines are intended to be in whole inch (or centimeter) increments, as will fit within the plotting setting limits.

  4. Measure and write down the distance between any marks in both the x and y directions (inches or centimeters). The difference between the measured distance and the nearest whole inch (or centimeter) should be small. Remember, the x direction is always in the paper motion direction, and the y direction is always the pen motion direction. All measurements must be accurate to three decimal places. For example:

    x = 40.125 inches or x = 101.918 centimeters.


    y = 30.001 inches or y = 76.203 centimeters

Here’s a sample calibration for x = 40.125 inches and y = 30.001 inches. Enter the calibration measurements using the keypad as follows:

ALT – SCALE – 4 – 0 – ORIGIN – 1 – 2 – HOME – ORIGIN – 3 – 0 – ORIGIN – 0 – 0 – 1 – SCALE

Note: Up to three digits after the decimal may be entered for each measurement.

The micro calibration setting remains in the plotter memory until a new calibration setting is made, the plotter is reset or the plotter power is turned off. These values may also be stored in the plotter’s non-volatile memory. See Storing Plot Parameters in your User Guide.

Custom page setup.
  1. Turn the plotter on, press ATL. Carriage will move all the way to the right endplate and kick back.
  2. Move carriage as close to the right endplate as possible.
    Press: ALT, UR, 1
  3. Press: LL
  4. Press: ALT, GO TO, 32000, ORIGIN, 14200, GO TO.
    At this point the grit shaft will start turning.
  5. When the grit shaft stops, press: UR.
  6. Press: ALT, 5, to bring the carriage back home.
  7. Press: ALT, 1
  8. Press: ALT, SIZE, 1, 5, SIZE, ALT, ONLINE.

Now you are ready to plot up to 80 inches.

To access the custom size press the following keys:

ALT, UR, 1, LL, SIZE, 1, 5, SIZE

Pen height: coarse adjustment for the LP 3700 & LP 4000.

When the pen is up on the LP4000 or LP3700, the centers of the two sprockets on the lift-plate assembly should form a line perpendicular to the traverse rods. The pen solenoid should also be approximately parallel to the plotter’s right end plate. If that is the case, proceed to the Fine Adjustment procedure.

However, if the pen lift belt has been forced past a tooth on the pen lift plate assembly, large changes in pen height will be required.

Proceed as follows:

  1. Remove the dust cover (two tan screws).

    Note: The pen carriage assembly has two spring-loaded damper assemblies that contact the dust cover. When removing (or replacing) the cover, use caution to move it slowly in the vertical direction, rocking gently to engage (or disengage) the two damper wheels.

  2. Remove the right top cover (four tan screws).
  3. Turn the pen height adjustment screw (hex type, located at right end plate) until the pen lift actuator assembly right edge is parallel to the plotter’s right end plate.
  4. Remove the hitch pin retaining the rear idler wheel on the pen carriage.
  5. Raise the rear idler wheel to clear the pen lift belt and rotate the pen lift plate assembly until the centers of the two sprockets form a line perpendicular to the traverse rods.
  6. Engage the nearest tooth of the lift belt, lower the idler wheel, and install the hitch pin.
Pen height: fine adjustment for the LP 3700 & LP 4000.
  1. Turn the plotter on.
  2. Press the 6 key to move the pen to the right limit.
  3. Lower the pen and note the clearance between the pen holder arm and the pen-lift plate assembly. The desired clearance is approximately .01 inch, to insure that the pen lift plate assembly is completely clear of the pen holder arm when the pen is touching the paper.
  4. Raise the pen.
  5. Repeat Steps 3 and 4 at several points across the plotter, noting the pen location that produced the smallest clearance. Move the pen to this location.
  6. Set the clearance to approximately .01 inch when the pen is down, using the pen height adjust screw (see Coarse Adjustment).
  7. Check the height of the pen in the raised position at the right, center, and left limits. The pen should lift at least .05 inch, measured at the pen point.
  8. Replace the dust cover, taking care to compress the pen carriage damper wheels inside the dust cover before lowering it into place.
  9. Replace the right top cover.
How to reset LP 3700 memory using the keypad.

If the plotter is exhibiting unusual symptoms, this procedure clears out any “garbage” that may be confusing it. This procedure must also be run when you change the logic board or the keypad.

Note: Plotter settings will be restored to factory defaults when you run the following procedure.

  1. Turn the plotter on and move the carriage to the right endplate.
  2. Press the following keys:

    ALT – UR – DOT – DOT – DOT – ALT – 1 – RESET – ALT – RESET

  3. Turn off the plotter and wait approximately 15 seconds.
  4. Repeat the above procedure 2 more times.
How to reset LP 4000 memory using the keypad.

Note: Plotter settings will be restored to factory defaults when you run the following procedure.

  1. Turn the plotter on.
  2. Press ATL and wait until the carriage does all the way to the right, returns to the left.
  3. .

    Press the following keys:

    ALT – UR – DOT – DOT – DOT – ALT – 1 – RESET – ALT – RESET

  4. Turn off the plotter and wait approximately 30 seconds.

The LP 4000 settings will be restored to factory defaults.

How to erase the autoview.
  1. Turn the plotter on.
  2. Press ALT.
  3. Wait 5 seconds, then press:

    ALT – UR – 1 – ALT – 1 – ALT – VIEW – 0

  4. Turn the plotter off. Wait 10 seconds.
  5. Turn the plotter on.
  6. Bring the pen all the way to the right hand side of the plotter.
  7. Press ALT – UR – 1 – LL – SIZE – 4 – SIZE – ON LINE

You are now ready to plot with the autoview off.

Note: The size 4 shown in item 7 is only a sample. You can go anywhere from size 1 to 15.

Dashpot Adjustment for the LP 3700 & LP 4000.

Pen-down motion can be damped by an adjustable dashpot located next to the pen solenoid.You do not need to install pen or paper for this test, as you are only going to observe the action of the pen lift mechanism.

  1. Remove the right top cover. (Four tan screws).
  2. Turn the plotter on.
  3. Check the dashpot adjustment.
  4. Press ALT 8 on the plotter keypad. The plotter will move the pen up and down rapidly while continuously stepping both drive motors.

    Watch for full back-and-forth travel of the right rocker arm between the two rubber bumpers. The adjustment screw for the damping action (slotted 1/4 inch hex type) is located on the end of the dashpot piston closest to the rear panel.

    Increase the damping by turning the screw clockwise until the rocker arm is no longer being pulled all the way toward the pen solenoid.

    Decrease the damping by turning the screw counterclockwise until the rocker arm is fully traveling between the bumper pads with each stroke.

  5. Finally, turn the adjustment screw one-half to one full turn counterclockwise, further decreasing the amount of damping. This should keep the pen from striking the plot media too hard when lowered, yet allow the pen to fall fast enough to reach the plot media before any pen or paper movement occurs.

    If, during subsequent plotting, this adjustment proves to be inadequate, one of two problems exist:

    • If the damping is set too firm, the pen will not reach the paper before movement starts, causing late line starts, incomplete text, etc. The adjusment screw should be turned counterclockwise during plotting until the problem is resolved.
    • If there is insufficient damping, the pen will strike the plot media with too much force, causing spots or even holes at the line starts. The adjustment screw must be turned clockwise to increase the amount of damping. Make this fine-tuning adjustment well into a long plot to be certain that it will perform well under most conditions.
  6. Replace the right top cover.
Adjusting the pen force.

The force that the pen or knife exerts on plotting media may be varied by adjusting the pen-down adjustment spring tension. Five settings adjust the knife/pen force from 20 to 60 grams. The optimal force setting depends on media thickness and sharpness of your pen or knife.

If the cut is good when the vinyl moves toward the front of the plotter (positive x-axis direction) but cuts too deep when the vinyl moves toward the rear of the plotter (negative x-axis direction), add more downward force to the cutter “foot”. This will provide extra support to prevent the blade from digging into the vinyl.

Find the pen force adjustment level under the dust cover. Push the adjustment level up or down to increase or decrease the pen force. Each new downward position of the lever increases the force by 10 grams.

If you are cutting with an Artpro cutter, you must balance the cutting depth of the blade with the pen force. Without balance, cutting quality diminish as letter size gets smaller.

Pen Force Adjustment Arm

Issue: plotter will not respond to the host computer.

Verify that the plotter is connected properly to the communications port. The data cable from the host computer should be connected to the port labeled “Host/Modem” on the plotter. If this is correctly done, continue to the next step.

Verify the cable configuration of your cable is the same as the one located in your User Guide.

The communication protocol for this plotter is:

8 data bits
No parity
1 Stop bit
Baud rate of 9600

Check to ensure you have the correct driver installed from your software to run the plotter. The default language is DM/PL.

Pen-rail height adjustment.
  1. Turn off the power to the plotter.
  2. Remove the dust cover (2 screws).
  3. Install the Pen Rail with pen trays located in stalls 1-8.
  4. Power up plotter.
  5. After the power-up sequence finishes (e.g. lights stop flashing), put the plotter in the internal diagnostic mode using the following key sequence:

    Press and hold the ALT key. Before the carriage moves to stall # 3, press and hold the RESET key while still holding the ALT key down. Hold until the carriage stops at stall # 3. The VIEW, ON LINE and SPEED lights will turn on. Press VIEW to enter the diagnostic mode. The VIEW, SCALE and ALT lights will turn on.

  6. Press SIZE. This will move the pen rail in and out. The SIZE light indicates the state of the home position limit switch (2 blinks per pen change cycle). The ALT light shows the state of the travel limit switch (1 blink per cycle).

    If the pen does not make a clean exchange, insert a 7/64 allen wrench into bottom hole located rear of keypad, above the serial cable. Turn right to raise height, left to lower, approximately 1/4 turn at a time.

  7. When a clean exchange is reached, press RESET key twice.
  8. To check adjustments for other pen locations, press ALT, CHARTHOLD, n (where n represents the pen number to be picked up), CHARTHOLD. The carriage will pick up the chosen pen and return to position # 3.
  9. To replace the pen, press ALT, CHARTHOLD, CHARTHOLD.

Repeat Steps 8 and 9 for other pen positions. It is not necessary to make adjustments for each pen position, however, it is a good idea to check various positions accros the width of the plotter.

LP4000 optical limit switch adjustment.
  1. Remove dust cover ( 2 screws).
  2. Remove pen tray carrier.
  3. Power up plotter; when the self-test sequence reaches the point where all yellow indicator lights are on, press and hold the plotter’s ALT and RESET keys simultaneously to enter the diagnostic mode.
  4. Using the 6 key, move the pen carriage to the right end plate. Press the 0 (slow) key. Press the 6 key again and “bump” the end plate, confirming that the pen carriage has reached its extreme limit of travel. The ALT indicator light should be off (the optical switch is blocked by the position tab on the Y-axis drive belt).
  5. Press the VIEW key once. The pen carriage should move approximately 1/2 inch to the left.

    Adjust the optical switch by loosening the mounting screw and moving the switch back and forth—holding it to maintain centering the Y-axis drive belt—until the switch is at the exact point where the ALT indicator light goes on.

    Tighten the mounting screw and verify that the switch does not touch the belt on either side.

  6. Test the adjustment by moving the pen carriage into the end plate with the 6 key (ALT indicator is off); then press the VIEW key. If the ALT light is on, press the 4 key one step at a time; the light should go off in four or fewer steps. If not, readjust the position of the limit switch.

If you cannot adjust the optical switch to within four steps of either Arrow key (with plotter in slow mode, see Step 4), do not attempt to bend the bracket switch to adjust further.

Adjust as close as possible, then exit the test mode by pressing the RESET key or turning the power off and back on. Then, test the multi-pen operation by installing the pen tray carrier and requesting pen changes. If the pen carriage does not line up properly with the pen stalls, further repair will have to be made.

Issue: Registration is poor or the media shifts.
  1. Check the set screws on the gritshaft to assure they are tight.
  2. Check the set screws on the coupling between the motor and the gritshaft.
  3. Are the chart wheels delaminated, installed backwards or have flat spots on them? (When the media hits a flat spot on a chartwheel, the media slips.)
  4. Are the chart wheels tight? Lock the wheels and tug the media. Can you get it to slip?
  5. Check the carriage that holds your pen or Artpro knife. Does it look cracked?
  6. Is the pen jaw loose? The plate that holds the pen jaw should be tight.
  7. Remove the left end plate and check all the set screws on the Y-motor.
  8. Visually inspect the Y-axis belt for cracks or damage.
Program User paramenters for the LP3700/LP4000.

The easiest way to program the memory of the plotter is by using the Plot Utility Disk. If you do not have this disk, you may obtain it through one of our Sign Cutter Service Centers or by downloading it from our Disk Utility Area.

The following steps should make it possible for you to program your plotter to power up with the parameters you desire (i.e., HP-GL or DMPL, paper size, speed, etc.)

  1. Turn on plotter.
  2. Put plotter on-line by pressing ALT, 6, without pens or paper.
  3. Insert the Ioline Utility Disk into computer.
  4. At the DOS prompt, enter README

    The following message will appear on the screen:


    Diagnostic Diskette

    1. Read explanation of files
    2. Run Keypad program (set up user parameters)
    3. Run Diagnostics Program
    4. Send Demo.plot to plotter
    5. Select Com.port/Baudrate
    6. Quit this program
    Enter Option:
  5. Press 2 to run the KEYPAD program.
  6. If the Baud rate and the COM port settings are correct, press ENTER. If they are not correct, change and the press ENTER.
  7. From the Main Menu, select the user number (1,2, or 3) to be programmed.

    As you can see, you can set all the user parameters from your computer keyboard, which is easier to use than the keypad on the plotter.

  8. Once you have changed the parameters as you need, press ENTER to get back to the Main Menu.
  9. Press 4 to program (store) these parameters in the plotter.
  10. Press A to select default to user 1, 2, or 3 when you Power-Up or Reset.
  11. Press 4 to program (store) these parameters in the plotter.
  12. Press B to select Plotter Boot Sequence.
  13. Enter parameters that you want the plotter to have when you power it up. For example, a user may boot with:


    This places the plotter online with user 1 values loaded and B size paper limits set each time the power is turned on.

  14. Press END and then Y to save Boot Sequence parameters and exit to Main Manu.
  15. Press 4 to program (store) these parameters in the plotter.

Your plotter is now configured to power up with the parameters you have chosen.

Cuts not closing circles or rounding 90 degree angles.

Change the degree of offset from 15 degrees to between 20 – 27 degrees in your Host Disk to improve the cut quality. Sometimes when you change from one software package to another, offsets need to be adjusted.

Knife Offset:

This parameter is the amount of blade offset or the distance from the tip of the blade to its center of rotation. The term “mils” refers to .001″ (1/1000 of an inch) units. The blade offset for knife blade from Ioline is marked on the package in which they are shipped. There are knife blades with two different offset distances available, 47 mils, and 15 mils.

The offset can be changed through the keypad by using the following keystrokes:

ALT . n . (ALT dot {number} dot ) where the {number} is the offset distance, to turn correction on and set the offset distance. The default is set at 15. If the cuts are not closing, the number should be changed (18 would be a good choice).

If you will be pen plotting, the knife correction must be turned off with the following key strokes:

ALT 0 . 0 . {ALT Zero dot Zero dot).

Additional notes:

  • Default pen speed is 8 ips.
  • Default acceleration is .5g.
  • BUFFER is always disabled.
  • When knife corrections are enabled, dashed lines are disabled.
  • When knife corrections are enabled, pen changes are ignored.
  • An initialization cut is made to set the starting blade position if the plotter receives a DM/PL file start, or an HP-GL IN command.
Issue: Line quality is poor when cutting vinyl or ruby.

If the line quality is poor, perform the following steps:

  1. Reduce the cutting speed.
  2. Set the pen height adjustment.
  3. Replace the blade.
  4. Check the pen force setting.

If you do not know how to make these adjustments, refer to your User Guide, Section 8.

If the line quality continues to be poor, there may be something mechanical wrong with your knife assembly.

Knife is dragging between the letters.

The tension of the spring must be increased.

To do this, unscrew the top of the ArtPro knife and remove the plunger, turning counter clockwise.

After removal, stretch the spring. Stretching the spring gives the knife more tension so the knife responds faster to picking up the blade off the media.

Force Adjustment Knob

Plotter to Computer interface.
The plotter default communication setting is 9600 baud, no parity, 8 data bits, 1 stop bit, and either software (XON/XOFF) or hardware handshake (RTS) protocol. The plotter is a DTE device, and requires null-modem cabling, with a DB25P (male) connector at the plotter end. The following is recommended:

RS-232 diagram for 25 to 25 pin connection

RS-232 diagram for 25 to 9 pin connection