Differences
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| ultimaker_original:calibrate_e-steps [2020/01/06 03:07] – [1: calibrate E-steps per mm] formlab | ultimaker_original:calibrate_e-steps [2020/01/06 05:21] (current) – [1: calibrate E-steps per mm] formlab | ||
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| We'll extrude 100mm of filament and measure what actually extruded: | We'll extrude 100mm of filament and measure what actually extruded: | ||
| - | |||
| - | * Heat up the hot end to 185°C | ||
| - | * Remove filament from the Ultimaker Original+ | ||
| - | * Keep the nozzle temperature at 185°C (otherwise printrun will give a cold-extrusion warning and won't extrude) | ||
| - | * Disconnect the bowden tube | ||
| * Connect USB cable from a computer to the Ultimaker Original+ | * Connect USB cable from a computer to the Ultimaker Original+ | ||
| Line 24: | Line 19: | ||
| * G1 E100 | * G1 E100 | ||
| * cool down hot end | * cool down hot end | ||
| - | * measure from the underside of the feeder to the mark made previously. | + | * measure from the underside of the feeder to the mark made previously. |
| + | |||
| + | If it measures | ||
| * Get the existing E-steps/mm value | * Get the existing E-steps/mm value | ||
| Line 43: | Line 39: | ||
| * Test if it was saved: | * Test if it was saved: | ||
| * M503 | * M503 | ||
| - | * Look for the line " | + | * Look for the line " |
| Do another extrusion test. Keep repeating these steps until the measurement after extruding is exactly 20mm. | Do another extrusion test. Keep repeating these steps until the measurement after extruding is exactly 20mm. | ||
| Line 50: | Line 46: | ||
| ===== 2: Tuning extrusion multiplier ===== | ===== 2: Tuning extrusion multiplier ===== | ||
| + | |||
| + | * measure the diameter of the filament at a few points with a micrometer and take the average | ||
| + | * for example: 2,89, 2,86, 2,88 averages out to 2,8767 | ||
| + | * enter this value as the filament diameter in the slicing application | ||
| + | * in the slicing application, | ||
| + | * Check the slicer value for "line width" and remember for later | ||
| + | * in this case: 0,4mm | ||
| + | * load a cube and slice it in vase mode at 0,15mm | ||
| + | * print and measure the thickness of each wall and take the average. | ||
| + | |||
| + | If the measured thickness is the same as the set line width, good! You're done! If it isn't keep on reading. | ||
| + | |||
| + | * Calculate new extrusion multiplier (or Flow) value | ||
| + | * if the flow parameter is in percentage, divide by 100: for example: 100% flow is extrusion multiplier of 1.0 | ||
| + | * (current extrusion multiplier × extrusion width in mm) / measured wall thickness in mm = new extrusion multiplier | ||
| + | * in my case: (1 x 0,4) / 0.4375mm = 0,9142 (or flow rate would be: 91,42% | ||
| + | * Enter the new extrusion multiplier into your slicer and print the model again and re measure the wall thickness. It should only take one adjustment, but it may take a few tries to get it right. | ||
| + | * This extrusion multiplier value should be calibrated and set on a per material basis due to the different flow characteristics of different materials when extruded (eg. viscosity, die swell). It may also vary between different brands of the same material type too, so keep this in mind. | ||
| + | |||
| + | After you have completed all these steps, it’s a good idea to tune or re-tune your first layer height, which may need adjustment | ||