MEKANIKA EVO Use and care manual

EVO
CALIBRATION METHODOLOGY

Calibration is the comparison of measurement values delivered by a machine under test with those of a standard value
of known accuracy.
In our case, since Evo comes as a kit and can be assembled with minor misalignments, the point of calibrating the
machine is to make sure that it can achieve the accuracy it was designed for.
It is not mandatory to calibrate Evo before working on it, the machine will already run smoothly, but you might notice
small measurement errors (especially on larger workpieces). The goal of this documentation is to provide a guide to
correct these errors easily.
The documentation is divided into 3 sections, corresponding to 3 dierent tests that have to be performed on the
machine. Don’t forget to download the relevant G-codes on our website before starting.
1. Measurements
2. Calibration
3. Spindle tramming
CALIBRATION METHODOLOGY
INTRODUCTION

1
1. Switch on the control unit of the CNC router
2. Move manually the machine to the front
3. Press the “Square Gantry” button
STEP #01 : SQUARING THE MACHINE
1. MEASUREMENTS

1. MEASUREMENTS
1. Press the “Home” button
STEP #02 : HOMING THE MACHINE

1. Press the “XY” button to dene the current position as the X0 Y0 working coordinates
STEP #03 : DEFINING THE WORKING COORDINATES
1. MEASUREMENTS

1. Install the 8mm endmill (included in the EVO kit)
STEP #04 : CHANGING THE ENDMILL
1. MEASUREMENTS

1. MEASUREMENTS
1. Place the crocodile clip on the endmill
2. Place the probing device underneath the endmill
3. Press on the “Tool measure length” button
STEP #05 : MEASURING THE TOOL LENGTH

STEP #06 : LOADING THE GCODE
1. Download the Calibration G-codes on our support page
2. Load them on your control unit with a USB key or using the Shared folder of the Raspberry Pi
3. Press the “Open Gcode” button
4. Open the “Squaring test” le
1. MEASUREMENTS

1
2
1. MEASUREMENTS
STEP #07 : SWITCHING ON THE SPINDLE
1. Set the rotation speed on “4”
2. Switch on the spindle
WEAR SOME SECURITY GLASSES AND EAR PROTECTIONS
NO NEED TO INSTALL THE DUST SHOE FOR THIS OPERATION

STEP #08 : MILLING
1. Press the “Play” button
1. MEASUREMENTS
WEAR SOME SECURITY GLASSES AND EAR PROTECTIONS

STEP #09: PREPARING FOR THE NEXT STEP
1. Once the work is nished, press the “Stop” button
2. Switch o the spindle
3. Bring the machine to the back with the “Y+ arrow” button
1. MEASUREMENTS

?
1. Use a measuring tape or a ruler to measure the “X” length
STEP #10 : MEASURING THE “X” LENGTH
1. MEASUREMENTS
PAY ATTENTION TO MEASURE THE INNER DIMENSION AS SHOWN ON THE DRAWING
TAKE YOUR TIME TO TAKE ACCURATE MEASUREMENTS, AS THEY WILL STRONGLY INFLUENCE THE CALIBRATION

?
1. Use a measuring tape or a ruler to measure the “Y” length
STEP #11 : MEASURING THE “Y” LENGTH
1. MEASUREMENTS
PAY ATTENTION TO MEASURE THE INNER DIMENSION AS SHOWN ON THE DRAWING

?
1. Use a measuring tape or a ruler to measure the diagonal 1
STEP #12 : MEASURING THE DIAGONAL 1
1. MEASUREMENTS
PAY ATTENTION TO MEASURE THE INNER DIMENSION AS SHOWN ON THE DRAWING

?
1. Use a measuring tape or a ruler to measure the diagonal 2
STEP #13 : MEASURING THE DIAGONAL 2
1. MEASUREMENTS
PAY ATTENTION TO MEASURE THE INNER DIMENSION AS SHOWN ON THE DRAWING

≈500
≈499,2
≈705,4
≈708.2
1. Write down all the measured dimensions
2. Draw the real geometry of the machine and exaggerate the shape to emphasis the lengths and angles
STEP #14 : DRAWING THE REAL GEOMETRY
1. MEASUREMENTS

1. In this case, the rst thing to do is to rectify the shape to obtain a rectangle
STEP #01 : FROM A PARALLELOGRAM TO A RECTANGLE
2. CALIBRATION
IF YOU MEASURED IDENTICAL DIAGONALS ON THE PREVIOUS STEP, GO STRAIGHT TO STEP#05

α
α= 89,82°
a=705,4
b=500
c=499,2
1. To be able to square this shape, we need to know its actual angles
2. Refer to the drawing and use this online angle calculator
STEP #02 : MEASURING THE ANGLE
2. CALIBRATION
In our case:

b = 699 (S,M)
= 1099 (L)
a
89,82°
α= 0,18°
a= 2,2 mm (if EVO-S or -M)
a= 3,5 mm (if EVO-L)
1. To rectify the angle, we need to know the oset distance
2. Refer to the drawing and use this online calculator
STEP #03 : MEASURING THE OFFSET DISTANCE
2. CALIBRATION
In our case:

2.2mm
1. In this case, we need to move the Y1 limit switch support by 2,2mm
2. Take the 3mm hex key to unscrew the M4 screws and slide the acrylic plate easily
STEP #04 : MOVING THE LIMIT SWITCH SUPPORT
2. CALIBRATION