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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Looking for Carbon Fiber and HIPS Pellets - 10 years ago
Ciao, I am looking for for Carbon Fiber Pellets and HIPS pellets, where to buy. I have found some resellers on Alibaba but wanted to know if anyone knows other distributors. Thanks Alessandroby biskero - Plastic Extruder Working Group
Re: pellet extruder?? - 10 years ago
Ciao, I am in the process of building a pellet extruder similar to this one: Will build it in steel since I will need to print carbon fiber as main material. I already build an extruder with one motor, 2 servos for 4 materials. It works fine but maintenance is a pain. Will do a post as soon as I get the pieces and will start to assemble it. Alessandroby biskero - General
Motor Driver interference Servos - 10 years ago
Ciao, I am building a new extruder, here some infos, and I am having an issues with the servos and the motor drivers. Basically when I move the extruder in the X or Y direction, so the motor drivers 8825 are ON the servos starts to move left and right, which means there is some interference from the motor drivers into the servo PINs (using 6 and 11 in AUX) on RAMPS 1.4. I already thinking to chby biskero - Stepper Motors, Servo Motors, DC Motors
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, so the issue is present with the Y movement too so it's definitely the motor drivers interference into the servos pins. Not sure what to do if finding new pins or shield somehow the pins but I doubt this would work. Alessandroby biskero - Reprappers
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, ho sistemato il problema 1, in pins.h c'era un pin definito 2 volte per fan e terzo extruder. Per il numero due, dopo altri tests il problema c'e' anche con Y, quindi sono delle interferenze dei motor drivers sui cavi dei servos. Ora devo capire come risolvere il problema. Alessandroby biskero - GCODE, Software e Firmware
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, yeah that's what I was looking at Alessandroby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, I am using the first 2 pins on the servo pin on the RAMPS, right above is the X stepper driver. So it might be that as you mention, I can try to reassign the pins but all the pins are very close to the drivers on the RAMPS. About the firmware I am using Kimbra-Marlin as the developer helped me with my 1 motor 3/4 extruder configuration. Will check the code. Thanks Alessandroby biskero - Reprappers
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, ho praticamente finito la stampante ed ho 2 problemi da risolvere. 1 - il terzo hotend non riscalda, e' montato su D8, vedo il voltaggio fluttuale tra mV e Volts ma non va' oltre i 37 gradi 2 - i 2 servo si muovono durante il movimento su X come ho descritto qui suggerimenti? un po' di foto @hackebike Grazie, Alessandroby biskero - GCODE, Software e Firmware
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, I completed the Extruder and it's working fine on first tests, so it's holding fine and pull up and down the filament with no problem. Now I am facing an issue that ggherbaz mentioned. Basically everything works fine if the extruder is not moving. If I move the extruder in the x direction, the servos starts to jerk left and right. It's strange since if it was interference from the motorby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, just wanted to give an update on the extruder project, here is a picture An improvement to make is to split the structure in 2 since to screw the motor has been a challenge!! The extension shaft for the motor and the left shaft are 5mm and are hold by very small bearings. Tomorrow will add the servos and levers, waiting for very small and long screw for the servo. Already tested the sby biskero - Reprappers
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, ho appena testato i servo su D11 e D6 e funzionano. Uso i seguenti comandi: M280 P0 S90 ; rest. vertical position M280 P0 S80 ; move -10deg, Ext 0 engaged M280 P0 S100 ; move +10deg, Ext 1 engaged Domanda, ho visto che su Slic3r c'e' la sezione "Tool change G-code" dove posso mettere il G-code in base a quale extruder deve essere usato. Nel mio caso ho 3 extruders T0, T1, T2, Ho visto cheby biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, chiedo venia, ma sono nuovo al mondo 3d in italia! Ottima idea !!! Le ottimizzazioni sono sempre interessanti ! Mi e' venuta un'altra idea per avere i 4 hot ends utilizzando 3 termistori. Visto che ho eliminato l' heatbed che e' connesso al D8 che ha 11A come amperaggio. Quindi potrei connettere 2 hotends in parallelo su D8 ed un termistore su uno di questi hotends che gestisce la tempeby biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, una domanda, per il tuo Marlin Kimbra Relè 4 MKR4, come fai ad avere potenzialmente 4 hotends/4 thermistors? Alessandroby biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, ok ho capito! Ho compilato ed incluso i 2 servo. Domani faccio qualche test e ti faccio sapere come procede. Grazie mille!by biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, non riesco a compilare: /var/folders/fn/8m01rkl91r7g32_mybx6snvr0000gn/T/build6145180915356987257.tmp/sanitycheck.h:292:8: error: #error HEATER_3_PIN not defined for this board #error HEATER_3_PIN not defined for this board ^ Error compiling. C'e' un check per il numero di hotend resistance per RAMPS 1.4 ? Alessandroby biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, "Non capisco perché devi dare il comando M42 P11 S255 per accendere il servo...." diciamo che in attesa di ricompilare il firmware e aver quindi tutto settato, dovevo testare con g-code. Una volta ricompilato il tutto con i settaggi giusti, come suggerisci, non dovro' usare il comando! "Per quanto riguarda i termistori se fai con il configuratore setta i pin per per il terzo quello delby biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, allora il servo che utilizzo e' questo Turnigy TGY-S712G, giusto per infos. Come load di corrente (28mAh) dovrebbe essere ok se uso pin D11 e D6 con il jumper su VCC 5volt, altrimenti vedo di usare un'altra VCC. M42 P11 S255 ; power ON servo 0 on pin D11 M42 P6 S255 ; power ON servo 0 on pin D6 Praticamente dice dare power al pins D11 e D6 con il comando S255 ( ON ). Questo viene fatto alby biskero - GCODE, Software e Firmware
Re: Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, grazie per la risposta rapidissima! Per ora, una volta abilitati i servo, pensavo di inserire g-code in Slic3r quando devo fare lo switch con il servo da un filamento ad un'altro. Penso funzioni facendo la seguente cosa per esempio se voglio utilizzare il primo extruder 0, l'altro e' a riposo: M42 P11 S255 ; power ON servo 0 on pin D11 M280 P1 S90 ; set position for extruder 1 to restby biskero - GCODE, Software e Firmware
Marlin Kimbra e nuovo extruder - 10 years ago
Ciao, ho progettato un nuovo extruder per una nuova stampante per un progetto, qui delle info. Praticamente e' formato da: 1 motore, 2 servo, 4 hotends (chimera + volcano) RAMPS 1.4 + Arduino Mega Ora vorrei utilizzare Kimbra come firmware e sto' cercando di ottenere la giusta configurazione utilizzando il tool . Ho definito un solo extruder visto che definisce il numero di motori #define EXTby biskero - GCODE, Software e Firmware
Marlin, M42 and Servo - 10 years ago
Ciao, I have precompiled Marlin firmware installed on a printer Prusa i3 and would like to add couple of servos. From what I understand I need to install a jumper on the 5V left pin of reset button and than the servos on right pins on reset button. Now to test if servos works I use the following g-code: M42 P11 S255 ; power ON servo 0 on pin D11 M280 P0 S90 ; set servo 0 to rest position noby biskero - Mendel90
Re: Material for large print bed - 10 years ago
Ciao, to me the PIR looks a great solution since is light, cheap and does not require the heat bed. I am printing mainly with carbon fiber and nylon plus HIPS support material so hopefully they will stick ! Hope to have some answers from resellers on Monday. Thanks Alessandroby biskero - Reprappers
Re: Material for large print bed - 10 years ago
Ciao, funny, but I am having problems to find an online store here in Europe that sells these type of panels directly to consumers !!! Hopefully on Monday some store will respond to my emails. BTW any suggestions on the panel? Should be only of PIR material not covered with other foils ? Thanks Alessandroby biskero - Reprappers
Re: Material for large print bed - 10 years ago
Ciao, super cool !!! Looks like I found what I was looking for Thanks a lot ! Alessandroby biskero - Reprappers
Material for large print bed - 10 years ago
Ciao, I am building a very large printer 1300mm x 800mm and wanted to investigate different materials for the print bed without heating. Currently I am opting out for glass and looking at aluminum 3mm thick. The printer will print different materials as I am building a dedicated 4 materials extruder. Any suggestions on different materials for the bed? Requirements are: No heated bed Very largeby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, I was just looking at these issues and also some load testing. The servos that I got are digital but as you and Olaf point it out, these kind of servos can have problems due to the fact that are "toy" servos. Maybe robotic servos can be more precise but did not find any yet of those small dimensions. I am planning to do more testing as soon as I have all the pieces. BTW will keep followinby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, just one more view of the internal gears Alessandroby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, I understand your points. I had servos holding weights for long time (robotics) and never had issues. Different servos (very high torque) from the one I plan to use so it depends from the quality of the servos. I had issues with servos switching from one position to another many times for long time and usually is due to poor quality gears. About the deadpoint at one time only one servo coby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, I edit the previous comment with more details. I understand what you mean but that's just to be defined in the code. It can be either way. For me the dead-point is the neutral where no engagement is on, on both servos. For example when you setup the filaments. Your comment "You´ll kill the servos with this levers" make me think of the case where you switch frequently between filaments. Foby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, thanks for the good feedback, very interesting design. I though about the springs but wanted to use less pieces as possible. But the servos do not have any force that goes against the lever beside moving the filament position closer to the MK8. Also these servos have 6/7kg torque and the force to keep the filament in its engaged position, pressed between the bearing and MK8, is not that biby biskero - Reprappers
Re: Multi Material extruder and one motor+servos - 10 years ago
Ciao, just finished the lever design, changed a bit the idea The bearing inside the lever arm edge is pretty small: internal diameter 5mm x external diameter 8mm x height 2.5mm, on the shaft are blue color. One question that I have on this design is the bearings at the end of the lever can be on different plane of the MK8 ? Currently they are a bit higher so that when the servo moves the beaby biskero - Reprappers