Alfawise U20 Dual Z Axis

Alfawise U20 Dual Z Axis

thingiverse

https://www.youtube.com/watch?v=14uteQvmNx4 This modification for the Alfawise U20, reduces or eliminates several problems: ** 1.- First layer difference ** between the left and right part of the X axis, when the Z axis is raised, especially in the first layers. Normally in this type of printers where in elevation push Z, is only made from the left side of X, tend to leave something behind the right side of X, because this side will tow that thrust. ** 2.- Wobble, Banding or Jitter, ** with a single Z motor, which raises the X axis, acting on the left side of this, the Banding may occur due to the fact that the bearings of the right side brake in excess the ascent from this side. This can be due to two causes: ** FIRST: ** The bearings on the right side of the X-axis are very tight with their eccentric nut. Normally its effects have a repetitive cadence, for example the same Banding pattern is seen every 1.5cm in a repetitive way. ** SECOND **: lack of parallelism between the 2 bars v-slot 2040, which support the Z axis. It is enough that the separation between these bars between the top in bottom differs by 0.5mm for the problem to appear. Normally its banding effects caused by this cause, are seen from a certain height of the impression and are increasing as the Z axis rises; They can also occur at the beginning of the printing and then disappear when the Z axis is lifted. To solve it, two pieces are included to replace the rear part of the X-axis assembly: ** AU20 Z back left V5.STL ** on which the Extruder is installed and ** AU20 Z back right V5.STL ** on which we will install the second motor of the Z axis. In addition, the following materials will be needed: - M5 screws - M5 DIN 9021 washers - M5 DIN 125 washers - M5 nuts - Motor Alafause U30 Longer 3D 42BYGH40H-2-19D (gearbest or aliexpress) https://www.gearbest.com/3d-printer-parts/pp_009425332915.html?wid=1433363 - System assembly engine nema to vslot 2040 https://es.aliexpress.com/item/Funssor-aluminio-Creality-CR-10-Z-soporte-del-Motor-CR-10-Tornado-ajustable-Z-Eje-del/32914261918.html?spm= a2g0s.9042311.0.0.274263c08qTCs9 - System of fixation superior of threaded rod to vslot 2040 https://es.aliexpress.com/item/Funssor-actualizaci-n-Creality-CR-10-Z-Eje-vivienda-Creality-ender-Z-cubierta-de-varilla-de/32877290146.html?spm= a2g0s.9042311.0.0.274263c08qTCs9 - Flexible coupling system of threaded rod 8mm to 5mm motor shaft https://www.aliexpress.com/item/5pcs-5x5mm-shaft-couplings-OD20mm-25mm-flexible-coupler-5mm-to-5mm-stepper-motor-5-5mm-D20/1949269053.html?spm= a2g0s.9042311.0.0.274263c08qTCs9 - Rod (and brass nut) threaded stainless steel with 4 start flanks and 8mm advance by rotation (2mm pitch), 500mm long and 8mm diameter. https://es.aliexpress.com/item/Reprap-3D-Printer-T8-Lead-Screw-Rod-OD-8mm-Pitch-2mm-Lead-8mm-L-150-350/32695606914.html?spm= a2g0s.9042311.0.0.274263c08qTCs9 - Parallel electronic coupling of 1 NEMA motor to 2 motors. https://www.aliexpress.com/store/product/Motor-Parallel-Module-for-Double-Z-Axis-Dual-Z-Motors-for-Lerdge-3D-Printer-Board-3D/822821_32896012168.html? spm = a219c.search0104.3.44.6a5c1ade0kcTMW & ws_ab_test = searchweb0_0, searchweb201602_4_10065_10068_10547_319_10891_317_10548_10696_10084_453_454_10083_10618_10307_10820_10821_10301_10303_537_536_10902_10059_10884_10887_321_322_10103, searchweb201603_45, ppcSwitch_0 & algo_expid = a519b0fc-61eb-41ed-a2cb-e4063b840807-6 & algo_pvid = a519b0fc-61eb-41ed-a2cb-e4063b840807 & transAbTest = ae803_3 - Nema motor cable https://es.aliexpress.com/store/product/SWMAKER-1meter-2meter-NEMA-17-stepper-motor-cable-line-4-6Pin-XH2-54-DuPont-head-extensive/718699_32921415680.html? spm = a219c.search0104.3.29.6e485100RAVKUp & ws_ab_test = searchweb0_0, searchweb201602_4_10065_10068_10547_319_10891_317_10548_10696_10084_453_454_10083_10618_10307_10820_10821_10301_10303_537_536_10902_10059_10884_10887_321_322_10103, searchweb201603_45, ppcSwitch_0 & algo_expid = 757ffe56-7baf-43b3-bd76-442ecd5aee8f-4 & algo_pvid = 757ffe56-7baf-43b3-bd76-442ecd5aee8f & transAbTest = ae803_3 ** WARNING ** before connecting the printer, it is necessary to verify with a multimeter that the outputs of the Z motor connection are the same in both motors, ** IF NOT, IT CAN BE DAMAGED BY THE MOTHER PLATE OF THE PRINTER . ** ---------------------------------------------- Esta modificación para la Alfawise U20, reduce o elimina varios problemas: **1.- Desnivel primeras capas** entre la parte derecha izquierda y derecha del eje X, al elevarse el eje Z, sobre todo en las primeras capas. Normalmente en este tipo de impresoras donde en empuje de elevación Z, sólo se realiza desde el lado izquierdo de X, tienden dejar algo retrasado el lado derecho de X, pues este lado va a remolque de dicho empuje. **2.- Wobble, Banding o Jitter,** con un solo motor Z, que eleva el eje X, actuando en el lado izquierdo de este, puede producirse el Banding debido a que los rodamientos del lado derecho frenen en exceso el ascenso de este lado. Esto se puede deber a dos causas: **PRIMERA:** Los rodamientos del lado derecho del eje X, están muy apretados con su tuerca excéntrica. Normalmente sus efectos tienen una cadencia repetitiva, por ejemplo se ve el mismo patrón de Banding cada 1.5cm de forma repetitiva. **SEGUNDA**: falta de paralelismo entre las 2 barras v-slot 2040, que soportan el eje Z. Basta con que la separación entre dichas barras entre la parte superior en inferior difiera en 0.5mm para que el problema aparezca. Normalmente sus efectos de banding provocados por esta causa, se ven a partir de cierta altura de la impresión y se van incrementando según asciende el eje Z; también se pueden dar al principio de la impresión y después puede ir desapareciendo al elevarse el eje Z. Para resolverlo se incluyen dos piezas para sustituir la parte trasera del montaje del eje X: **AU20 Z back left V5.STL** sobre la que se instala el Extrusor y **AU20 Z back right V5.STL** sobre la que instalaremos el segundo motor del eje Z. Además se necesitarán los siguientes materiales: - Tornillos M5 - Arandelas M5 DIN 9021 - Arandelas M5 DIN 125 - Tuercas M5 - Motor Alafause U30 Longer 3D 42BYGH40H-2-19D (gearbest o aliexpress) https://www.gearbest.com/3d-printer-parts/pp_009425332915.html?wid=1433363 - Sistema montaje motor nema a vslot 2040 https://es.aliexpress.com/item/Funssor-aluminio-Creality-CR-10-Z-soporte-del-Motor-CR-10-Tornado-ajustable-Z-Eje-del/32914261918.html?spm=a2g0s.9042311.0.0.274263c08qTCs9 - Sistema de fijación superior de varilla roscada a vslot 2040 https://es.aliexpress.com/item/Funssor-actualizaci-n-Creality-CR-10-Z-Eje-vivienda-Creality-ender-Z-cubierta-de-varilla-de/32877290146.html?spm=a2g0s.9042311.0.0.274263c08qTCs9 - Sistema de acoplamiento flexible de varilla roscada 8mm a eje motor 5mm https://es.aliexpress.com/item/5pcs-5x5mm-shaft-couplings-OD20mm-25mm-flexible-coupler-5mm-to-5mm-stepper-motor-5-5mm-D20/1949269053.html?spm=a2g0s.9042311.0.0.274263c08qTCs9 - Varilla (y Tuerca de latón) roscada de acero inoxidable de 4 flancos de inicio y 8mm de avance por rotación (2mm paso), de 500mm de largo y 8mm diametro. https://es.aliexpress.com/item/Reprap-3D-Printer-T8-Lead-Screw-Rod-OD-8mm-Pitch-2mm-Lead-8mm-L-150-350/32695606914.html?spm=a2g0s.9042311.0.0.274263c08qTCs9 - Acoplamiento electrónico paralelo de 1 motor nema a 2 motores. https://es.aliexpress.com/store/product/Motor-Parallel-Module-for-Double-Z-Axis-Dual-Z-Motors-for-Lerdge-3D-Printer-Board-3D/822821_32896012168.html?spm=a219c.search0104.3.44.6a5c1ade0kcTMW&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_10547_319_10891_317_10548_10696_10084_453_454_10083_10618_10307_10820_10821_10301_10303_537_536_10902_10059_10884_10887_321_322_10103,searchweb201603_45,ppcSwitch_0&algo_expid=a519b0fc-61eb-41ed-a2cb-e4063b840807-6&algo_pvid=a519b0fc-61eb-41ed-a2cb-e4063b840807&transAbTest=ae803_3 - Cable motor nema https://es.aliexpress.com/store/product/SWMAKER-1meter-2meter-NEMA-17-stepper-motor-cable-line-4-6Pin-XH2-54-DuPont-head-extensive/718699_32921415680.html?spm=a219c.search0104.3.29.6e485100RAVKUp&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_10547_319_10891_317_10548_10696_10084_453_454_10083_10618_10307_10820_10821_10301_10303_537_536_10902_10059_10884_10887_321_322_10103,searchweb201603_45,ppcSwitch_0&algo_expid=757ffe56-7baf-43b3-bd76-442ecd5aee8f-4&algo_pvid=757ffe56-7baf-43b3-bd76-442ecd5aee8f&transAbTest=ae803_3 **ADVERTENCIA** antes de conectar la impresora, es necesario comprobar con un polímetro que las salidas de la conexión de motores Z son iguales en los dos motores, **SI NO ES ASÍ SE PUEDE LLEGAR A DAÑAR LA PLACA MADRE DE LA IMPRESORA.**

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