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The Arduinos run fine at 250000 - I have never run slower, and never have comm issues.
- Tim
by
tadawson
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Prusa i3 and variants
If you rotate the encoder and get normal feedback clicks, that also confirms that your are correct. If you have the skills, a meter a d the schematics will let you determine the actual pin1 as well - the Ext1 and Ext2 labels have not been reported to have been seen wrong that I am aware of.
- Tim
by
tadawson
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Reprappers
Due to the stepping pulses, a normal meter *cannot* give a valid current reading on a moving stepper! When it stops, the current is steady to hold position (and current is not higher - the meter can now get a valid reading due to it being steady), and the driver applies the same current limit in either case. Myself, I set my max Vref based on motor specs, and not guesswork and/or voodoo . . . it
by
tadawson
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Printing
Yeah, they are *supposed* to go one way, but some idiot somewhere made up a batch with connectors installed backwards . . . my plain controller and 12864 are keyed exactly opposite. Typically, if they are backwards, you don't get the backlight at all, and (fortunately) the pinouts prevent any damage from reversal.
- Tim
by
tadawson
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Reprappers
Run an M500 to write, and check for errors. M503 to read and verify. Last, change something like M206 or M666, and reboot or recall from EEPROM and verify the changes revert to what you wrote to EEPROM.
-Tim
by
tadawson
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Controllers
No such thing as a DC transformer, and I doubt that many DC to DC switching converters will tolerate PWM temp control . . . maybe if you can use bang bang, and accept looser temp tolerances. . . all in all, not a good situation . . . Maybe a DC solid state relay and external 24v power (or 12v upconverted *prior* to the relay), driven by D10.
- Tim
by
tadawson
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General
Reversing an endstop, at least on a RAMPS card will short out the 5v regulator on the Arduino, which can fail, resulting in no 5v unless coming from USB . . . . and this appears to match your situation, unfortunately . . .
- Tim
by
tadawson
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General
Check the probe offsets . . . and probe function with M119 . . .
- Tim
by
tadawson
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Reprappers
Just take the leads of of the connector shell, do what you need to do, and then put them back . . . or did I miss something?
- Tim
by
tadawson
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General
Make sure that pullups are enabled if you are using mechanical endstops -
// coarse Endstop Settings
#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors
If you don't, they will float, and could read pretty much anything . . . The RAMPS does *nothing* to the endstop signal between it and the Arduino - it just passes the lead alo
by
tadawson
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Prusa i3 and variants
I'd never consider moving parts . . . if I do a v2 card, it will be an exclusively new build, since the components are easy to get and pretty inexpensive. Granted, for a one-off, it won't be cheap, but it *IS* possible . . .
- Yim
by
tadawson
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RAMPS Electronics
It isn't . . . the SD message is purely informational, and I see it all the time with zero impact. Your problem is something else, but as others noted, comment out SD_CARD_SUPPORT in Configration.h if it bugs you that much. No card in the slot vs. no slot at all look the same electrically . . .
- Tim
Quotefattmann
Quotetadawson
SD init fail simply means that there is no SD card inserted, and
by
tadawson
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Delta Machines
SD init fail simply means that there is no SD card inserted, and isn't really an error . . .
- Tim
by
tadawson
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Delta Machines
Or at least be upfront that they do that . . . . the concept I can understand, but somewhere they need to give actual order status.
- Tim
by
tadawson
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Prusa i3 and variants
Likely it's not grounding at all, but rather filtering and regulation . . . in any case, a better supply will help.
- Tim
by
tadawson
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Reprappers
I'm running a V1 with Marlin4Due, and it's without fault . . . layer fan, automatic electronics fan, delta geometry, LCD, etc. all there and working. About the only issue right now is the Graphic LCD support still causes the same stuttering as on a Mega, but we think we have that identified, considering that Repetier on this card does not have the issue.
Myself, I don't consider this a 'misfortu
by
tadawson
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RAMPS Electronics
You need to be certain that the T nuts rotate into position - if the alignment is off, they won't, and then all you get is the screw dug into the back of the channel, and looseness. And when they do rotate correctly, there is zero need to go gorilla fist on the torque - they hold solidly when just firmly snug, and I built my entire printer (as well as rebuilt it once) with not so much as a nick o
by
tadawson
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Delta Machines
- Tim
QuoteSlowFoot
Quotetadawson
Ironically, you can see the gap due to the corners being extruded wrong in thier photos . . . for those of you whonhave read my thread on that topic . . .
The good news is that they finally got rid of the crap extruder block thatbate bearings!
And myself, having gotten my rails smooth with nothing more than ample lube and use, I'm not sure I see the wheels a
by
tadawson
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Delta Machines
Ironically, you can see the gap due to the corners being extruded wrong in thier photos . . . for those of you whonhave read my thread on that topic . . .
The good news is that they finally got rid of the crap extruder block thatbate bearings!
And myself, having gotten my rails smooth with nothing more than ample lube and use, I'm not sure I see the wheels as anything other than a downgrade . .
by
tadawson
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Delta Machines
I've seen these connectors fail due to not much more than looking at them from an angle . . . that, and there is no possible MOSFET fault that can draw more current through the connector than what is drawn when the MOSFET is on . . . so very little to no relationship between the two . . . but yes, both are possibilities, as I already mentioned . . . Also, MOSFETS typically fail locked on (shorted
by
tadawson
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Reprappers
I have never had Folger fail to respond . . . or to fail to take care of problems . . . they just aren't as quick as some would like.
They also appear to use tne USPS tracking stuff to manage orders, in that they do create to tag immediately . . . but if an item is delayed or out of stock, it sits until the order is complete . . .
- Tim
by
tadawson
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Prusa i3 and variants
Pull the heat bed power input conector off the RAMPS and have a look. The poor quality Chinese knockoff Molex connectors overheat and burn very easily, and this is what happens, and you often can't see anything from the outside. Barring that, the only other component in the power path is the MOSFET . . . You should also see a red LED go on and off with the heatbed channel on the RAMPS. Oh, and la
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tadawson
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Reprappers
There is in 1.0.3 . . . not sure about the stuff Folger provides, since I walked away from it about 5 days in . . . but in the new stuff, at least, you set DELTA_PRINTABLE_RADIUS in the Delta section to set that limit.
- Tim
by
tadawson
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Delta Machines
That pin is passed directly through RAMPS . . . what happens if you run just the Arduino, is it OK? If so, look for Chintastic solder work, bridges, and/or swarf on your RAMPS board.
- Tim
by
tadawson
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RAMPS Electronics
Sure it can! Directly to the right or left of the nozzle in line with it is X=+/-number, Y=0.
- Tim
by
tadawson
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General
If you see 12v at the supply with everything on, likely it's not the supply . . . were the supply that weak, nothing would heat! V=IR, thus, if it can't supply current, it can't maintain voltage . . .First, check to cheapy Molex knockoff connectors going into your RAMPS - they are notorious for burning and failing, and causing problems of this type. Second, if position affects the fan that badly,
by
tadawson
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Reprappers
When a circuit is powered, ohmmeter readings are not valid . . . not certain exactly how you are making the determination of pin 41being grounded when the Arduinomis powered. There should be a pullup resistor on that pin high until the kill switch pulls it down by connecting to ground . . . and I think that pullup *should* be on the Arduino . . . For now, you should be able to redefine KILL_PIN t
by
tadawson
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RAMPS Electronics
Any chance you are on the wrong thermistor port? There are three on tne RAMPS, and you are only using two . . . And is your MOTHERBOARD definition set to type 33? The RAMPS really does not have much on it to fail - it is mainly a pin fanout for the Arduino . . . and heater power control.
- Tim
by
tadawson
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Delta Machines
Looks like your Repetier Host config is broken . . . those errors are all on your computer, not the printer. You might want to go back to Pronterface . . . I find it a lot easier myself, and then pick what you like once things work. On either package, though, you need to go into settings and tell it what your printer is. Oh, and the first thing you probably want to send is a 'Home' (G28) - withou
by
tadawson
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Reprappers
Are you sure you have 12 volts present? Endstops, thermistors, and the Arduino run on 5v from USB, so will all look OK even if 12v is absent.
- Tim
by
tadawson
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RAMPS Electronics