your inside a big wooden reverberation box... add some sound dampening foam.by Dust - Stepper Motors, Servo Motors, DC Motors
a lot of voltage regulars on megas are fried when switch type endstops are plugged in backwards. The direct short from +5v to gnd will do this nearly every time. Most pc usb ports are protected form excessive current draw... but if they do trip you often have to completely power down the device to reset them. (ie remove the battery on laptops) They aren’t so protected from excessive voltageby Dust - RAMPS Electronics
When a voltage regulator goes it can either go out quietly doing no damage or pass, in this case 12v, to all the 5v devices killing them all. You wont know till you try them. The ramps provides 12v to the voltage regulator on the mega to generate 5v, you have already said this is dead... so you will get nothing by powering the ramps. If the voltage regulator isn't shorting, you can now only pby Dust - RAMPS Electronics
all you do its correctly define your homing positions in configuration.h // Travel limits after homing (units are in mm) #define X_MIN_POS 0 #define Y_MIN_POS 0 #define Z_MIN_POS 0 change to // Travel limits after homing (units are in mm) #define X_MIN_POS -5 #define Y_MIN_POS -5 #define Z_MIN_POS 0 It wont un bump the endstops, but 0,0 will be where it should be when you printby Dust - Firmware - Marlin
re hot end you need a mosfet driver that can be switched with 5v input. eg The signal wire to turn on is then just connected to the hold pin of that cnc v3 board. This need a digitial pin, but all analog pins can also be digital pins, but the reverse is not true. BTW You can find some nice documentation on this cnc v3 boardby Dust - General
Re thermistor The pin looks correct, but I bet you just plugged the thermistor wires into to the resume pin and the black pin next to it. This will not work. Firstly the black pins on the right are all GND's what you need is a additional resistor and a capacitor This is what you have gnd -------------------------------------- thermistor wire resume -----------------------------------by Dust - General
If the Y label is at the back and you didn't the rotate the model you have you X and Y switched Easy to test just manually tell the printer to move X and see what moves. If the head moves left/right its good. If the bed moves front to back, you have X and Y (and the endstops of it wouldn't home) swapped over.by Dust - Prusa i3 and variants
"Crappy rubber tubes" work better than those metal ones, as the metals ones compress in the Z axis Presuming they are nice and tight and not slipping.by Dust - Prusa i3 and variants
MINTEMP means your extruder is reporting a temperature that is to low to let you extrude plastic so it disables extrusion Z is up and down, this is normally driven by a drive screw (commonly a m5 rod) Most people dry to drive this far to fast find your max feed rates in your firmware settings eg /** * Default Max Feed Rate (mm/s) * Override with M203 *by Dust - Prusa i3 and variants
several wifi sd cards have been hacked to allow uploads Most are slow...... Prusa firmware for genuine prusa printers supports Toshiba FlashAir SD cards NB they had to add in a software switch on the lcd to enable/disable it, this extra code upsets some regular SD cardsby Dust - Firmware - Marlin
are you talking about this board ? It does look like its permanently wired for all mode lines to be high ie 1/32 on DRV8825 and 1/16 on a4988 ie An easy hardware fix would be to remove the M0 and M1 pins from the pololu module to reconfigures DRV8825 as 1/16thby Dust - Reprappers
yes, the only issues is the analog pins are numbered separately to the digital pins numbers so A9 doesn't just become D9 its something else in the Digital side. From what I can google I see Port Pin Function PF 0 54 A0 PF 1 55 A1 PF 2 56 A2 PF 3 57 A3 PF 4 58 A4 PF 5 59 A5 PF 6 60 A6 PF 7 61by Dust - General
you need 2 IO lines minimal for step, direction Preferably you should also have a enable on an IO pin, but you can just tie that to a rail and have it always on (check steppers and drivers aren't getting to warm if you do this) So yes you can use X, Y min endstops The thermistor pin is normally analog, you would need to find the appropriate digital io pin name for it, presuming it can do digby Dust - General
CS pin is only for advanced stepper drivers with SPI interfaces not needed for A4988by Dust - General
Its called layer shift.. the causes are numerous Here are some causes. Two little current on pololu to much current on pololu resulting in overheating pololu and thermal shutdown. to much friction on an axis Over extruding resulting in nozzle hitting plastic and being knocked out of positionby Dust - Prusa i3 and variants
Hi The Developers section has the following description "If you're reading this, you're a developer. Please join: " But the URL is a 404 error Is there are new list and url? Or can we change the description? Thanksby Dust - Administration, Announcements, Policy
are they red pcb's? If so its a cheap clone of a RRD glcd.... Sadly they use the cheapest components they can source at the time... I've not see two that are actually identical.. But the sd part is quite simple, just voltage converts on the spi bus... (sd cards are 3.3v) As for your issue... that is quite weird. One thought are you using real full sized SD cards? or micro sd with a convby Dust - General
for unknown reasons this thread was resurrected from 2013!!by Dust - New Zealand RepRap User Group
how about an idea of location? so we can get an idea of what shipping might be like.by Dust - For Sale
sadly its closed source... no schematics.. but its the same idea as the ramps atmega io pin -> mosfet gate to turn heated bed on and off + power threw the mosfet. Only other thing you can do is replace the mosfet, anything more would require surface mount work..by Dust - Prusa i3 and variants
that firmware code is specifically for the orriginal prusa mk2, not for clones. It is hard-coded with values for that machine and presumes you have a inductive probe and a v42 bed with the 9 embedded probe points. (also presume things like probe is in same position as the mk2) From my experience with a mini rambo and that firmware until that firmware completes a calibration via the lcd it willby Dust - Prusa i3 and variants
I would guess this pre made code is not normal or not for that controller.. (Im thinking prusa mk2 firmware, which until you configure it via the lcd will not talk) how about some details, like from where did you downloaded it from? "Mini-Rambo build" doesn’t mean a thing other than to tell us its uses a Mini-Rambo controller. M907: Set digital trimpot motor The default are apparently #dby Dust - Prusa i3 and variants
care to share how you added this logging? Just curiousby Dust - Firmware - Marlin
not really a good idea to tack your questions onto another discussion. It will often be over looked. Much better to start your own discussion. Anyways We need more details.. controller type what firmware what does your configuration.h look like motor type details. First some basic testing, with a control program like pronterface if you send the printer a "M119" gcode what does it say? Anythby Dust - Reprappers
There are a surface mount fuses on the GT2560 the indicated one is for the bedby Dust - Prusa i3 and variants
MKS TFT28 and MKS TFT32 displays are also good. Since they don’t put any load on the controller.by Dust - Firmware - Marlin
Correct, fan should blow on cooling fins of the hot end, not the heater block. Images of a MK8 show a fan on heat sink, are the fins up and down or left and right, Should be left and right.by Dust - Reprappers
when you enable DUAL steppers it steals it from the 'additional' extruders you need to define E2_STEP_PIN for the pin your using on AUX, in the pins_RAMPS.h file will also need #define E2_STEP_PIN #define E2_DIR_PIN #define E2_ENABLE_PIN #define E2_CS_PIN as a quick test you can set them all to -1 just to see if it complies But for actual movement you need real pinsby Dust - General
its hardly a nema17 though....by Dust - Reprappers
the 28byj-48 is not a reprap compatable stepper motor Im surprised it moves at all... Basicaly all stepper drivers are not the same inside... This one has the two centre coils joined together making it unipolar Two types bipolar (reprap compatible) and unipolar see for lots more info Luckily this type can be modifiedby Dust - Reprappers