Well, I always wanted to answer as fast as I could, but instead I stopped while typing my answer and decided to check my own theories. I guess this was a lot better than to (stupidly) follow your words and do nothing beside that. And because all of that, I learnt a bit more about electronics.by Loader009 - Printing
Maybe this custom RAMPS design was kinda using a part of RAMPS 1.7 design? -> But anyway, lack of documentation is always a problem for cheap chinese clones, I guess. It was indeed a good group effort, I completely forgot to check any datasheet at first, I have to get used to this.by Loader009 - Printing
QuoteimqqmiOh and the reset and sleep pin, whats the signal lije on those? I checked, reset is floating, sleep is high. Thank you, that was the problem, this solved it According to the RAMPS schematic, RESET and SLEEP are connected to each other. This would be good, because for the A4982 SLEEP have a pullup resistor. Both signal must be high according to the datasheet. I falsely assumed that Rby Loader009 - Printing
The enable pins are always low (all of them) and all stepsticks are shutting down at the same time. (enable pin was still low while motors have stopped) One thing wonders me right now. After trying to read the test code, I think that all motors should work at the same time and rotate in the same direction and speed, always. This was not the case, some motors worked, some stood still. I will checby Loader009 - Printing
I connected a fan to Vmot/GND, it was still rotating after the motor stopped. (I even stopped it by hand.) There must be something in between Vmot/GND and the motors. I guess that there is only the steppers between Vmot and the motors? Either I try to get one cap off (which is pretty hard because of the SMD components) or I buy one new stepper and look if it works with that. I prefer the latterby Loader009 - Printing
If that would be the case, then C4 wouldn't be damaged, because I never had plugged any stepper there (only E0, X, Y and Z steppers are in use)? The issue is also present for C4 (E1 stepper).by Loader009 - Printing
According to this -> (look at the Power part) C6 have been reverse charged and probably damaged... am I guessing right? Though, I don't have SMD caps, but I have through hole elecrolytic caps for replacement, 100µF with 16V/25V (no 35V). I could replace that (after removing and testing it). edit: Vmot still has 12V after motors stop working (I measured that a dozen times). Maybe somethingby Loader009 - Printing
In the youtube video you see the STEP signal, without working motors. So yes, the STEP signal reaches the step sticks. I have no other mega board but an arduino uno (dunno if the ramps test code works on that, but I know that I need to modify pins, just tell me if it is worth testing on it). I attached my variable DC PSU with a display and it showed about 1A of current drawn while the motors werby Loader009 - Printing
Thank you for the explanation, but sadly the issue isn't gone with MS1/2 set to high. - ramps is turned off; (arduino still has the ramps test code flashed) - removed the stepper drivers - set jumpers for MS1/2/3 (though, the stepper driver has only MS1/2 after researching a bit - it is a A4982, not A4988. A4982 datasheet -> ) - put back stepper drivers - turned on - motors moved for about 3by Loader009 - Printing
So, here are the results: - Different psu doesn't change the issue. - Ripple of the (first) psu is about +-0.2V, nothing to be worried about. - All stepper driver are OK after testing them with my stepper driver tester. This one, if you are wondering -> (but mine is not from reprap.me and the components like the connector and the big cap have different colors) stepper settings: MS1/MS2 aby Loader009 - Printing
Thank you for your suggestions, I will check the following tomorrow: - different psu (actually I hear some kind of clicking noise inside the psu , but it didn't bother my old sanguinololu until recently.) - about the grounding issue, in generell one have to cut a trace or remove D1 to be able to use usb. I didn't do that initially and I guess the transistor on the arduino clone tried to power mby Loader009 - Printing
The stepper drivers (X and Z) are ok. (I tested them with the stepper driver tester, didn't check the others yet.) I know that I have to unpower the board if I want to plug/unplug the motors or anything. I still cannot find the random working/not working issue. Maybe the diode D2 is damaged and stops working if there is too much amps? Or one of the mosfets stops working if too much amps is beingby Loader009 - Printing
Thanks, I didn't know that. I corrected it, the first test (only with X stepper driver & motor) worked, X-axis moved. Then I put in Z stepper & X-axis motor to Z stepper, X stepper still on board. It didn't move. I removed Z stepper and have put X motor back to X stepper (like in the first test). It doesn't move again. I guess it's something with electronics on the RAMPS... any idea whby Loader009 - Printing
Hey there, I ordered my first RAMPS 1.6+ from aliexpress -> This one -> But I am having problems... First off, I did two mistakes. 1. I connected USB to Arduino (clone) Mega 2560 while it was powered by RAMPS. But this seems to be no issue, it still works with the VIN at 12V, nothing seems to be broken. (Only the cable got pretty warm and one of my micro usb cables is broken now.) 2.by Loader009 - Printing
Hey Leute, ich hoffe ich bin hier richtig mit meinem Problem. Mein Sanguinololu will nicht mehr, er startet nicht mehr, als sei etwas von der Elektronik hinüber. TLDR weiter unten. Lange Variante: Das Board hatte schon seit ungefähr nem halben Jahr leichte "Start"-probleme, der Bildschirm (ein Panelolu2) zeigte zwei Zeilen Schwarz (Zeile 1+3 schwarz, 2+4 weiß) und bei den letzten paar mal braucby Loader009 - Elektrik & Elektronik
Hey there, I am not very good at electronics, an amateur you can say with a will to learn something. I am using this thing -> in between a 46A 12V PSU and my heatbed. This help the bed to get up to 110°C within 12 Minutes. But I am worried if this little thing can do 46A for this period of time, the MOSFET can do it as far as I understood from the provided datasheet. The extruder is not heby Loader009 - Sanguino(lolu)
Hey there, I guess you have not expected a sign from me ;D Good news: The Problem seems to be solved. There are many things which might had influence on my problem. - holes for the M5 threatet rod of the X End Idler/Motor might have been too small (expanded them) - one cable to a motor might have not been properly soldered (tested each and fixed the faulty one) - too high feedrate for the Y axby Loader009 - Firmware - mainstream and related support
Ok. 0.8A, I will try to calculate the correct VREF. I also understand the microsteps, because I understand what it is for. I also will swap motors/drivers later. I swapped earlier the driver (before I had got the easy stepper) but now I am able to test more precise. The motors... well, it's kind of hard (because of the cable length) but I will test that of course too. I think that the accelleraby Loader009 - Firmware - mainstream and related support
I've tested and the results are confusing me. First, the hardware: Ice Blue StepStick -> 2x Wantai Stepper Motors (NEMA17) 2.5A(U) (I can give the modelnumber if you need) The motors have little differences in resistance... I'm kind of confused, that one of them seems to vary between 1.4-1.7 ohm. (Bad soldering point? I had extended the cable of one motor.) Also some of my results: 1. It sby Loader009 - Firmware - mainstream and related support
I'm sure that I tried that earlier and it didn't help But I tested this anyway. It looks like it works (almost) fine when it is "warm". I let it about 10 times move up and down. Sometimes it showed the issue temporarily (about 1s or less). I turned the stepper driver about 1/8th (clockwise), it seems to have no impact but the issue didn't last as long as it did the first time this day. I also hby Loader009 - Firmware - mainstream and related support
Seems that the problem wasn't the "touching" of the rod and the motor.. The issue still exists. (With marlin ErikZalm firmware; same settings as used in T3P3.) One motor seems to hang (Z-axis), so the other one moves "partly". Because of this they get different heights. I'm thinking of getting new plastic parts and new linear bearings. (Those which I got might be defective...) New threaded rodby Loader009 - Firmware - mainstream and related support
I think I've found the reason for my Z-axis problem. The motors are connected to the threaded rods with an alluminium... thing (don't know how it's named; see picture). I have (because of unexperience) let the rod and the motor "touch" inside this alluminium "connector". That is probably the problem. Now I've placed them with some space, so they don't touch each other. That should help. The rigby Loader009 - Firmware - mainstream and related support
EEPROM on both enabled. (I checked to be sure.) I think I know what it is/was but I don't know, why on one firmware and not the other. The right Z motor have to deal with more drag. Today I accidently held that threaded rod too strong and the same noise appeared. The electrical resistance on both Z motors differs from each other, that might be a problem as well. This don't explain why one firmwby Loader009 - Firmware - mainstream and related support
Hello, I'm pretty new in this "3D printer scene", I've got my printer now for over 2 weeks. I've build the 3D printer (Prusa i3) within one week and now I'm calibrating etc. since last sunday. Long story short: Everything is fine with Marlin from T3P3. Not fine with Marlin from ErikZalm. The Z axis have problems when moving fast. (If too fast, it doesn't move at all and gives noises.) The confiby Loader009 - Firmware - mainstream and related support