How to operate the head calibration of the high-speed cylindrical bottle printer?

Table Of Contents

What is Vertical Calibration?

Vertical calibration is to check whether the physical position of the head is perpendicular to the guide rail, and it can only be corrected physically. Click the print vertical calibration button to check whether the head is vertical, as shown in the figure below:

check whether the head is vertical

When the two lines of the same color are not on the same straight line, the head needs to be corrected. For the calibration method, please refer to the following diagram:

When the two lines of the same color are not on the same straight line, the head needs to be corrected

Step calibration

After the gear ratio of the stepping motor is calibrated OK, further fine-tuning is required, and it is judged whether there is a problem with the stepping by printing the stepping calibration chart. Here’s how to calibrate:

Step offset

① . Scale mode: judge whether the step is accurate by the value corresponding to the scale

② . Scale mode: print a picture of a ruler

Both calibration modes can be used. Usually, the scale mode is used to fine-tune the step. After placing the material, click the “Step Calibration” button, and the following figure will be printed out:

It can be seen from the figure that the scale corresponding to the complete overlap of two lines in the vertical direction of all lines is at the 0 scale, indicating that the stepping is OK and no calibration is required; if the place where the two lines completely overlap in the vertical direction is not 0 but a positive or negative number A certain scale value of the direction (if it is -5), then the calibration method is to fill this value (-5) into the parameter input box under “Scale Mode”, and then click the “Save Parameter” button at the bottom. Repeat the same operation until the scale corresponding to the two lines completely overlapping is on the 0 scale, which means the step calibration is OK.

Axial offset

Axial offset is the offset along the left and right directions of the axis. Axial offset calibration is based on the first white ink head (H2) as a reference (value is set to 0), for the second color head (H1) and the third varnish head (H3) in the axial direction (left and right direction) Perform the entire head offset calibration on the Click the “Axial Offset” button, and the following picture will be printed (usually by printing a sharp grid map or other color chart calibration), observe the printed picture, and confirm that it is the color head or the varnish head based on the white ink head on the left and right There is an offset in the direction, and input appropriate values in the print head parameter input box corresponding to the offset (usually color H1 and varnish H3), H1 (color ink print head), H2 (white ink print head), H3 (varnish print head). Debugging method: set the H2 (white ink head) parameter value to 0, the input of natural numbers is valid, and the input of negative numbers is invalid. Assuming that H3 (varnish) is relative to white, if it shifts to the right, it will increase from the original value, otherwise, it will decrease; if H1 (color) for H2 (white), shifting to the left will reduce the original value, and vice versa.

Axial offset

Column Channel Axial Offset

The above axial offset is for the calibration of the offset between the heads in the left and right directions, while the column channel axial offset is for the calibration of the channel-to-channel offset of the same color head. In general, the parameters in the column “column channel axial offset” are for offset calibration when the single channel (C1Y, C2M, C3C, C4K) in the color print head has a color offset problem in the left and right directions, white ink or varnish Because it is the same color, it is generally ignored.

Column Channel Axial Offset

Color calibration

Color calibration

When a certain color of the printed image has a color shift in the direction of rotation (up and down/front/back/vertical direction), it can be corrected by adjusting the color shift. exist

In the process of debugging the front and rear offset of the color, you need to pay special attention to it. When you choose different printing speeds (including low, medium, and high speeds), the corresponding offset parameter values are different. Therefore, it is necessary to calibrate the parameters of which gear to print at which gear speed is used. Color calibration can only correct the problem of image offset in the direction of rotation, and the left and right directions of the image cannot be corrected here. The left and right offset depend on whether the physical position of the head is perpendicular to the guide rail. corrector

The method is very simple. For example, when a certain color is offset from other colors, the correction method is to subtract from the original offset value. If it is offset to the front, the correction method is to add to the original offset value. . If the magenta M is offset backward, the offset value before correction is 0, according to the calculation method of subtracting after offsetting and adding before offsetting, that is 0-3=-3, as for how much to subtract depends on the actual offset, so Change 0 to -3, and click the “Save Parameters” button after the modification; the color calibration method is understood through the magenta offset schematic diagram below:

Color calibration

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