according to this mostly Chinese pdf Those pins are just always on 12 or 24 volt. This would make sense as you should never turn off the fan that blows across your hot end cooling fins Now if you want an additional cooling fan that software can control plug that into the D9 port.by Dust - Reprappers
Don't be fooled by micro-stepping The first rule of steppers is they can really only do 1/4 steps, when you select something higher it wont actually move every step. But it does result in quieter moves (Some steppers will attempt 1/8 positions, but the positions will not be uniformly distributed) Eg In general if you have 1/8th micro stepping position, action 1 doesnt move 2 moves to 2/8 posby Dust - General
QuoteReplace Can I take a constant 5V somewhere from the board and rout it to the filament-out switch back to the jam detect input pin ? Or do I really need to make the 5v myself ? The endstop plug on a ramps is 3 pins S (signal), GND, and 5V. If what ever you using to detect filament of lack there of can use 5v and doesn’t use to much current (no motors, servos, coils, electric magnets or soleby Dust - RAMPS Electronics
QuoteFanch You mean that the 11 amps input is only linked to heatbed for regulation and does not supply the rest of the board ? Is that the goal of the 5 amps ? Yes.by Dust - General
all off is 3 low, which is valid for full stepping, its is loud and chunky movement, but works for testing. Most use 1/16 on all axis to reduce noiseby Dust - RAMPS Electronics
"With the switches wired in series and if Y was already homed ( opening up the circuit ) how does the X know" It doesn’t. You should not have any axis homed before you hit home. The homing procedure is It will home an axis then move it off home (so it still knows where it really is), and repeat for next axisby Dust - Controllers
It needs working temperature probes (thermistors normally) If its not reading room temp or higher it will not heat You do have to turn them on though.. it not automaticby Dust - CoreXY Machines
"DEFAULT_AXIS_STEPS_PER_UNIT to 2560" this is actually really high for a reprap, I wonder if you have found a bug... try 80, just as a testby Dust - RAMPS Electronics
Check you pulley is firm on the stepper motor That fact that its hidden makes me think this issue is in there... (it's just asking for it to fail without being noticed) If you have stepper with a flat on the shaft and the pulley grub screw is loose it can catch on the edge of the flat, so some moves are correct, but others (particularly but not limited to change in direction) will be out.by Dust - Reprappers
Thats really really odd then... take a photo of your board... maybe that will show something (drivers in backwards, in wrong place, out by one pin etc) The ramps is just wires from the mega to the pololu modules in the form of a pcb (+ caps and jumpers) , you could check the step direction and enable pins are getting from the mega to the stepper driver in seconds... Also is you ramps downby Dust - RAMPS Electronics
There is another one somewhere, but cant find it again. From memory they where printing directly onto bottles (being a easy glass cylinder to get a hold of)by Dust - Let's design something! (I've got an idea ...)
No pin on the RAMPs will directly accept a 12v signal. 5v max. You need to put what ever your using signal threw a voltage divider to drop it to an acceptable voltage. see For your firmware look at jam detection So set #define JAM_METHOD 2 you also need to set /** Pin which toggles regularly during extrusion allowing jam control. -1 = disabled */ #define EXT0_JAM_PIN -1 set this to theby Dust - RAMPS Electronics
You are applying 12v to the 12v 5amps plug of the ramps? (for some reason some people like putting 5v in here and nothing moves) Also do you have the micro stepping jumpers installed (3 jumpers under each pololu module)by Dust - RAMPS Electronics
Quotethe_digital_dentist I don't get it. The RAMPS board has its own 5V regulator, but you're using a separate one for the touch sensor? No it doesn’t. It uses the one on the mega, which is normally over loaded. Most people who run servos on a ramps end up removing the vcc/5v jumper and providing their own 5v or the servo randomly twitches.by Dust - Reprappers
Your bltouch is being feed by your 5v pin only, nothing else in on that power line (only other servo pins) What are you using to generate the 5v? any smoothing caps? whats its rated current? From what I read the bltouch can suck up 300mA (well they say under 300mA but never give a figure, so I read that as min 300mA) I would suspect your 5v first 30A should be tonnes.by Dust - Reprappers
No idea why repetier is being brain dead... you would have to ask the developers. The plugin is just python code.. you can edit it in a text editor, so is easy to add in the two lines open up laser.py find the section: 'header': """ G90 """, replace with: 'header': """ G90 M452 M3 S255 """, NB this is just a educated guess... but should work. QuoteQuote: so if I understand well now,by Dust - Firmware - Marlin
re servo jitter, you probably over loading your power supply wire up a separate power supply to provide 5v to your servo, a 7805 to the 12v line will do..by Dust - RAMPS Electronics
NB this is generating code for Repetier firmware M452 is only in that firmware (at least as far as teh g-code wiki is concerned) Your code is using spindle commands to turn the laser power on/off, but it also has an enable pin (see below) M3: Spindle On, Clockwise (CNC specific) M5: Spindle Off (CNC specific) see In the current firmware "Here G1/G2/G3 moves have laser enabled and G0 moves hby Dust - Firmware - Marlin
I've seen this done already somewhere, quite some time back. even had you tube videos of it... Not the youtube I was thinking of... but still3d additive lathe Skip to 2:40 to jump printing the balloon and get to the printing on a balloonby Dust - Let's design something! (I've got an idea ...)
I personally don't use a display, I have played with the main types, a 20x4 char display works fine with mega based controllers. Many people insist you can't get good prints from a connected computer and say you need to print from SD card.. I prove this wrong every day. (but I do use a dedicated Linux machine) But I would consider myself a casual user, not running machines 24/7 as a businesby Dust - RAMPS Electronics
Well you can eliminate anything on the ramps then. so firmware or the mega... I suspect the mega, as configuration looks good.by Dust - Reprappers
"For my knowledge, the voltage regulator should be inactive when 5V via USB is connected." This is incorrect USB power is secondary If there is a power supply to the DC in jack or the VIN pin of the mega (VIN is the way ramps does it) the power supply is fed threw the voltage regulator on the mega and the power from USB is disconnected via a MOSFET. There is a common issue of over loading tby Dust - RAMPS Electronics
You have a short somewhere... or you have a misconfiguration of your motherboard type in your firmware so its looking at the wrong pins for the temperature. Or your using completely the wrong type of thermistor settings in firmware so it really does believe it is over temperature or you have set the max temperature trigger to below room temp What type of controller do you have and what typeby Dust - Reprappers
Quoteharlandraka Yeah, I noticed and changed them, but they don't seem to work, when I click the endstop marlin does nothing. If I click it while moving, motor doesn't stop, and the "X" continues blinking... Most repraps are setup so endstops are only checked when homing, not during normal moves. as already stated above you need to check your endstops are working with the M119 command (from aby Dust - RAMPS Electronics
You need to install firmware, hopefully your suppler provided this You also need to copy over any eeprom settings m503 to see them, enter each line into the new machine then save with M500 (resuming something like marlin) Now if you cant get firmware from your provider... you have to work out all the parameters of your machine and build one. This will take some time.by Dust - Prusa i3 and variants
The hot component sounds like the voltage regulator (its on the mega, not the ramps?) It indicates you are drawing far to much power This is commonly cause by plugging you endstops in backwards and shorting +5v to gnd via the endstop switch. remove the end stops asap, but its already probably to late. Doing this destroys the voltage regulator.by Dust - RAMPS Electronics
Blinking X,Y Z on the display just means you have not homed the axis, so it thinks 0 is where ever it was at power on. Most likely (as most people seem to miss this) you have not installed any stepper micro stepping jumpers under to stepper modulesby Dust - RAMPS Electronics
Use a dc extruder Use a skeinforge vs slic3r or other modern slicers (so many parameters it almost imposable to get right) use crappy printed pulleys (adds random irregularities) and maybe use the old T5 belts too use 1/2 stepping at most (just reversing all the main improvements over the years)by Dust - Reprappers
Your 25 amp power supply should be fine. You only need 16amps, current is pulled from the supply, so more current is fine It will only take what it needs.by Dust - RAMPS Electronics
Without this gap your extruder will get hot, something most are not designed for, only the hot end should be hot, Most extruders jam up with they get hot as the fitment is to hot to high and thus soft, so it goes everywhere vs down the hole its meant to.by Dust - Prusa i3 and variants