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ultimaker_original:calibrate_e-steps [2020/01/06 02:37] – formlab | ultimaker_original:calibrate_e-steps [2020/01/06 05:21] (current) – [1: calibrate E-steps per mm] formlab | ||
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- | * Remove | + | We'll extrude 100mm of filament |
* Connect USB cable from a computer to the Ultimaker Original+ | * Connect USB cable from a computer to the Ultimaker Original+ | ||
- | * Connect Printrun / Pronterface to the printer: Baud rate: 250000. Any software that allows you to send single-line | + | * Connect Printrun / Pronterface to the printer: Baud rate: 250000. Any software that allows you to send single-line |
- | * Heat up the hot end to 185°C (otherwise printrun will give a cold-extrusion warning and won' | + | * Heat up your hotend to your regular printing temperature and ensure that the nozzle is in a position above the bed where it can freely |
- | * Disconnect | + | * change |
- | * Insert | + | * In printrun set the extrusion length to 100mm and the speed to 50mm/min (needs to be slow!) |
- | * In printrun set the extrusion length to 100mm and the speed to 100mm/min | + | * with calipers, measure 120mm(!) from the underside |
- | * Put a mark on the filament | + | * Send the command M83. This will ensure that your printer is interpreting the following extrusion commands in relative mode. |
- | * extrude 100mm | + | * extrude 100mm(!) at 50mm/min |
- | * Put a second mark on the filament. | + | * G1 F50 |
- | * Remove the filament and measure the distance precisely | + | * G1 E100 |
- | + | * cool down hot end | |
- | + | * measure from the underside | |
- | The Ultimaker Original+ came with a setting of +836.0 Esteps/mm. | + | |
- | After extruding 100mm, I measured 96,3mm had actually been extruded. | + | If it measures 20mm you're good and you can skip the next steps. If not, keep reading. |
- | 100/96,3 = 1, | + | |
- | The default Esteps/mm is 866 | + | |
- | 866*1, | + | |
- | Enter 899 as the new Esteps/mm value (Ultimaker O+ menu > Control > motion > Esteps/ | + | |
- | Save memory | + | |
- | Repeat this measurement. | + | |
- | + | ||
- | Now I measure 11,1mm with a Esteps/ | + | |
- | + | ||
- | + | ||
- | ------------------------- | + | |
- | First time | + | |
- | + | ||
- | Desired extruded distance / actual extruded distance = correction multiplier | + | |
- | 100 / 96,3 = 1,0384 | + | |
- | + | ||
- | Correction multiplier × original extruder steps/mm = calibrated extruder steps/mm: | + | |
- | 1,0384 * 836 = 868 | + | |
- | + | ||
- | ------------------------- | + | |
- | Second time | + | |
- | + | ||
- | Desired extruded distance / actual extruded distance = correction multiplier | + | |
- | 100 / 99 = 1, | + | |
- | + | ||
- | Correction multiplier × original extruder steps/mm = calibrated extruder steps/mm: | + | |
- | 1, | + | |
- | + | ||
- | ------------------------- | + | |
- | + | ||
- | Send new value to the printer: | + | |
- | M92 E876.7 | + | |
- | + | ||
- | Save setting in memory | + | |
- | M500 | + | |
- | + | ||
- | Test if it was saved: | + | |
- | M503 | + | |
- | + | ||
- | --> look for the line " | + | |
- | + | ||
- | + | ||
- | ------------------------- | + | |
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+ | * Get the existing E-steps/mm value | ||
+ | * send M503 | ||
+ | * look for the line " | ||
+ | * look for the E-value in the line. In this case: 868 | ||
+ | * 120 - measurement = actual extrusion distance | ||
+ | * in this case: 120 - 21mm = 99. (We're 1mm off) | ||
+ | * Desired extruded distance / actual extruded distance = correction multiplier: | ||
+ | * 100 / 99 = 1.0101010101 | ||
+ | * Correction multiplier × original extruder steps/mm = calibrated extruder steps/mm: | ||
+ | * 1.0101010101 × 868 = 876,7676 | ||
+ | * Send new value to the printer: | ||
+ | * M92 E876.7 | ||
+ | * Save setting in memory | ||
+ | * M500 | ||
+ | * Test if it was saved: | ||
+ | * M503 | ||
+ | * Look for the line " | ||
- | Calculate the total amount of steps the extruder did: | + | Do another extrusion test. Keep repeating these steps until the measurement after extruding is exactly 20mm. |
- | 899 (E-steps per mm) * 100 (100 mm extruded) = 89900 (total steps taken) | + | |
- | Calculate the correct steps/mm value: | ||
- | 89900 (total steps taken) / 11,1 (total millimeters extruded) = 809 | ||
+ | ===== 2: Tuning extrusion multiplier ===== | ||
- | Do a testprint | ||
+ | * 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. | ||
- | ===== 2: Calibrate | + | * Calculate new extrusion multiplier (or Flow) value |
+ | * if the flow parameter is in percentage, divide by 100: for example: 100% flow is extrusion | ||
+ | * (current extrusion multiplier × extrusion width in mm) / measured wall thickness in mm = new extrusion multiplier | ||
+ | * in my case: (1 x 0,4) / 0.4375mm | ||
+ | * 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 |