Show all posts by user
there should be a wiring diagram to series connect the two steppers if you go to the RobotShop web site and find the Afinibot A3 printer and pick it there is an instruction pdf with this info for Melzi board how to connect 2 steppers one driver
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Roger123D
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Prusa i3 and variants
Avoid acrylic frames, get actual lead screw on Z axis not threaded rods, look for all metal extruder/ hot end get official E3D not clones or an MK8 in the least as most cheap printers have limited temp ranges not for exotic filaments and buy from a well know supplier with support not generic suppliers. LCD is good to diagnose esp communications and errors. Upgrades would be extruders, larger size
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Roger123D
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Reprappers
i have never used abs as I find PETG works well without a heated bed and prints around 215 - 220 c and never use my heatbed
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Roger123D
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General
sounds like y axis end stop not working or is reversed when you home any axis it should stop when it touches the microswitch unless they are optical and when you start a print all axes should go to home before it starts need to know the board etc for more help
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Roger123D
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Prusa i3 and variants
very simple put the glass on the bed and move extruder (x axis) carriage to home the nozzle should come down beside the bed in this position you now home z down slide the carriage to the bed if nozzle is too low it will be stopped by the edge if you have springs put the bed down and slide carriage onto glass and adjust springs in each corner to this height then go back and adjust them paper thick
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Roger123D
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Prusa i3 and variants
try swapping thermistor location at the board did the printer come preloaded with firmware or user loaded could be firmware related if sensors are good
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Roger123D
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General
this happened to me after tensioning the belt during a print got the y axis too tight and things stopped during mid print for about 20 seconds possibly not enough current to the stepper to overcome the added load
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Roger123D
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General
I wouldn't print directly on the PCB board it should come mounted on the underside of an aluminum leveling plate in which case you can put blue tape on it. If there is no aluminum plate best thing to use is a glass plate on top of that PCB using binder clips to hold it to that heatbed. The bed needs to be level at a distance of 0.1mm from Z home. I use school glue to hold my prints on glass witho
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Roger123D
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Prusa i3 and variants
manually check the bed height on the bad side it make be too close or too far compared to good edges
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Roger123D
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Prusa i3 and variants
This is a Prusa I3 type machine thats good but search for similar in steel frame as acrylic is not great.Its a direct drive extruder thats ok. Try looking for Prusa I3 steel as far as Arduino its an addictive field like 3d printing but not necessarily required. Arduino needs Mega 2560 then interface board and driver boards and uploading program to it. I have an acrylic that is slowly being conver
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Roger123D
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Prusa i3 and variants
put the x axis carriage together ie the rods with extruder carriage getting both rods same length between ends and place it where it should go now take the 2 smooth rods and slide from the top frame down thru x rod ends into z stepper holes you now have the x carriage moving up and down these rods. Next you slide one screw from top and let it thread down to the coupler repeat with other thread. o
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Roger123D
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Prusa i3 and variants
make sure you have matched baud rate of printer to usb on computer
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Roger123D
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General
Building a printer from ideas is a lot harder than it seems as you have to source all the parts and then build a mechanically sound and square frame. I would find a kit that comes complete and do some printing first then you can decide on perhaps a better extruder or heat bed and things like linear slides as opposed to steel rods. Learning the weakness of a machine makes for a better build. And m
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Roger123D
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General
since as you say you have a scope why not look at the waveforms out of the controller to the stepper and in doing so we could all get a look at what the output is like
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Roger123D
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Reprappers
When the print don't stick the Z axis height is too high have never used autolevel I use glue on glass with PLA and PETG and when they don't stick I kill the print and readjust the Z height physically or you could just change the Z offset to make it lower.
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Roger123D
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Printing
make sure the wires on the heater are solid connection wise then make sure they are tight in the terminal blocks. Personally I would use a separate power supply just for the bed heater
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Roger123D
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General
What was the price of that printer? Check the Y axis bearings for free movement and alignment
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Roger123D
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Printing
While your at it check the voltage on the gate of the Mosfet that drives the heater
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Roger123D
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General
I used blue tape on the aluminum bed and it worked but the aluminum being warped became an issue so I put a glass plate on top which improved the level issue. Even on a clean glass I found the blue tape would bubble and lift causing print to curl and deform. So I no longer use the blue tape instead I use a glue stick rubbed on glass just before the print and that is all I use now works for PLA &a
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Roger123D
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Printing
the mk8 is direct drive the cooling fan is mounted on a heatsink with the fins facing the fan which blows inward and should always be running. If you make the fins run horizontal instead of vertical then drill a 5/16 hole in the lower left quarter of the heatsink it allows air directly to the top area of the heat break where the filament goes in below the feed gear. The teflon inside may be defor
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Roger123D
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General
? have you tried making the inverting true on the min hardware stops
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Roger123D
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Prusa i3 and variants
Try using PETG its stronger than PLA and easier than ABS. I run mine 215 first layer 210 second you can experiment for best temp and I use no heated bed just glue stick on glass
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Roger123D
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Prusa i3 and variants
Can't any of those videos help you ? Try removing just the nozzle then the filament should come out when you extrude no heat needed if the filament comes out no problem then hold the nozzle with pliers and heat it red hot till filament drips out and burns off the nozzle then check it over a light you should be able to see the pinhole at the tip if not only two choices replace tip or run proper di
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Roger123D
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Prusa i3 and variants
make sure that steppers are not disabled if they are you can move x and y by hand also check stepper motor currents if not high enuf they are in a sense not putting on the brakes
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Roger123D
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Repetier
look at the Printer Settings found in the Config under Slicer for a specific setting called Z offset and make it zero otherwise it will either raise or lower nozzle the amount in Z offset which can be a positive or negative value. It is a software adjustment for Z axis height to fine tune it.
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Roger123D
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Repetier
No matter what operating system you have somebody hates it. Apples fall from trees windows fog up seems if you can afford a 3D printer then a separate laptop with any OS including Windows 10 that you only connect to the internet for OS and virus def updates might be a choice or simply never update with CAD and printer software
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Roger123D
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General
this is not an MK8 extruder as the throat on MK8 is fully threaded with teflon tube visible at both ends there should also be a brass nozzle. If you want replacement parts for an MK8 lookup RobotShop web site under tools and accessories 3d printer parts they also offer a complete true MK8 should you even want one or upgrade to an E3. I wonder if you could get enough refunds to build another print
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Roger123D
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Prusa i3 and variants
Most likely one of the settings in slic3 is out of range a missing % sign look under speed or advanced . I had my solid infill at 100 and forgot % it though 100 mm giving me an error
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Roger123D
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Repetier
when you change a setting you need to click save and when you do a box pops up to save as that name or give it a new name like PLAorange. if you gave it a new name when you saved it then once you exit config before you slice male sure that name appears in the list below the slice button this must be done before you slice and print. If you again change your temp it must be saved and you have to re
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Roger123D
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Repetier