arduino 101: there are two ways to upload new firmware onto the chip 1) over a usb/serial cable. This reboots the board and runs a bootloader program that allows you to upload over serial This is the normal way to upload used when you click the upload button. Requires that your boot loader matches the setting in the boards.txt file. If it doesn’t you often get stk500 sync errors. 2) using a AVRby Dust - Sanguino(lolu)
bypass the bootloader and use your isp to upload Use CTRL+SHIFT+U vs upload button.by Dust - Sanguino(lolu)
umm... so called smart ramps ramps for 3.3v due... Doesn’t seem popular... don’t know why, its been around since June 2016by Dust - RAMPS Electronics
That is the circuit diagram for A4988 Stepper Motor Driver Carrier with Voltage Regulators I don’t know of any controller that uses these.... (Ok I use one on my E2 driver as I only had 12v... and no regulators and thus recognized it) I suspect Soadyheid is looking at the wrong thing... the D1 in question is on the ramps board, not the stepper driver itself.by Dust - Reprappers
All pololu socket type stepper modules you just remove the VMOT and its GND pins and wire them to 24v and GND... (and connect all the GNDs on the supplies) How about a re-arm with a ramps where by you have done the above modification? Re-arm is also fine with 24v for a full 24v system. (ramps still needs 36v caps and better polyfuses)by Dust - General
Nice work. Though I suspect all it needed was new pin definitionsby Dust - Prusa i3 and variants
re length, of course it is.., I blame tiredness + senility .. it has been 20+ years since i have done any real math!by Dust - Developers
That I cant say.... it is "fishy" What heated bed are you looking at?by Dust - Controllers
dual voltage heated beds are two resistors in series or parallel depending on 12v/24v hookup 12v is in parallel, 24v is in series Cant remember actual values but let say its 2.2 Ω per 'resistor' so 12v with resistors in parallel 1/(1/2.2Ω + 1/2.2Ω ) = 1.1 Ω and 24v with resistors in series 2.2Ω+2.2Ω = 4.4 Ω now on to wattage for 12v i = v/r where v = 12 and r = 1.1 Ω = 10.9090909 amps p =by Dust - Controllers
math... best guess (without actually looking at the maths, so could be quite wrong) ((distance from start to end position in 2d space * desired extrusion width) / input filament diameter ) * multiplier where distance = abs(x2 - x1) + abs(y2 - y1); This is more the core of how a slicer works... the g code is just how far to move the axis in mm, its knows nothing of the above.by Dust - Developers
sounds mechanical to me... like your pullies have come lose from the stepper shaftsby Dust - Firmware - Marlin
does you lead screw have multiple starts? as that needs to be factored inby Dust - Mechanics
If you do that please note the 15amp poly fuse is only rated for 16v on most ramps.by Dust - Controllers
the mk2 is not that primitive, lots of subtle things you have probably missed. a) high quality parts, vs crap from china. (makes such a difference) b) the hidden cross bracing threw the power supply mount. c) the firmware, many features that are not available in any other firmware, ie the auto alignment tests d) electronics and cables harnesses all just plug together, no soldering and most arby Dust - Prusa i3 and variants
your almost there... Easy way is to remove D1 on the ramps, this is the diode that feeds 12v into the vin pin of the mega.. (it is under the X and Y stepper driver modules) If you don’t remove it, then yes you connect 9v and 13v, this would be bad... NB your fans may not like the extra voltage either...by Dust - Controllers
That's just repstraps... see for prusa "How much change do you have to make to justify giving it your own name?" a significant contribution, or a really big ego! Prusa basically designed the basic outline of most of the current machines,by Dust - Prusa i3 and variants
"H ave to second the comment that you need a 3D printer to make a 3D printer. Been puttering for five years.." nah see repstrap... it just makes it far easier! (and yes I did it this way, but cheated on the extruder, but could have used wood)by Dust - Prusa i3 and variants
Printer doesn't look to be designed for PLA, pla needs a fan directed at the print, but still shouldn't jam, will just get sub perfect prints. The fan on the hot end, is it always on? as it needs to be on or PLA filament will get jammed at top of hotend. (needs to be cool before it hits PTFE. Mostly im guessing its just a shit hotend... on the cheapest printer Ive yet seen.by Dust - Prusa i3 and variants
Its the IO pin they use on the pibot from their firmware #define PiBot_Z_PROBE_PIN 64 /////****PiBot use this pin as Z-Probing pin ↓ means active lowby Dust - Prusa i3 and variants
The pi bot for all its fanciness is just another mega/ramps all in one clone So the PiBot optical sensor should work fine. No idea if it can detect glass or not though...by Dust - Prusa i3 and variants
ambitious... I suspect adding this many heated beds and thermistors would well and truly over whelm a pore little mega... Also are there 12 free analog in's? I don’t think so... there are only 16 in total on a mega an most of those have been used as a digital out. I also think your going to run out of spare IO lines, on a ramps... I would have a separate mega controlling all the beds and theby Dust - Developers
Yes you can change m201 or m204 any any time.. but there is a small buffer, so don’t expect instantaneous changes This doesn’t change the eeprom setting though, not till you do a m500 re the ring ripples, are you talking about the ringing (can see almost shadows of the edges repeated again) or the over all surface effect?by Dust - General
Anyone interested in a Christchurch reprap meeting Currently its just a Idea Venue is more or less sorted, for a gold coin donation for attendees/participants I thinking in about 3 months Mid august, plenty of time to get the word out. I’m currently thinking A Saturday afternoon. So setup Saturday morning. Just a general get together, show off latest reprap printers or printed related projby Dust - New Zealand RepRap User Group
"these fuses stay tripped until they cool down" this is what they are ment to do, but many from cheap suppers never fully recover so remain just at tipping point.by Dust - RAMPS Electronics
Sadly there is no such thing as standard colors with steppers Fairly sure these suppliers use what ever scrap cables they found while sweeping the shopby Dust - RAMPS Electronics
The test code also turns on the mosfets, which are connected to the leds Its meant to move the motors back and forward every time it goes around loop it it toggles the step line If its if (millis() %10000 <5000) the direction line is high, otherwise its low, ie back and forth for 5000 mills in each direction. Rumbling is normally broken wire to steppers, or miss wired steppersby Dust - RAMPS Electronics
The internal logic is maintained, its current phase etc, the FET that actually drives the coils are off, ie It will not move. The full paragraph . Enable Input. This input turns on or off all of the FET outputs. When set to a logic high, the outputs are disabled. When set to a logic low, the internal control enables the outputs as required. The translator inputs STEP, DIR, and MSx, as well asby Dust - RAMPS Electronics
use the ramps test code.. your code hasn't enabled the stepper driver.by Dust - RAMPS Electronics
1) unlikely. Or will be old and you will want to update it. 2) printer setting are likely to be non exsistant. might be with old cura... 3) one would hope, but depends on what board you have 4) to compile and upload the new firmware. 5) GOOGLE.COM, or try reading some of the forums.by Dust - Prusa i3 and variants
This is how PID works.... check your PIDTEMPBED settings A real relay will a) drive you batty with clicking b) eventually due to sparking contacts it will one day fuse in one position. a external mosfet driver on heat sink is a better option, there are several options now on the market eg orby Dust - Firmware - Marlin