Ramps 1.4: motors stop moving

Hi,
I've just finished mounting my Reprap and I have some troubles with the electronics.

I'm using Marlin with an unofficial Ramps 1.4 board and I have problems when moving motors manually with pronterface (I never tried to print).

I have a 12V 30A Supply and work at 115200 baud.
I'm using this motors

When starting to use, motors move 2 or 3 times when clicking on a direction on pronterface (as it is supposed to do), but after a while just humm and don't move.
When it begins to humm on an axis all the motors humm after that or don't make noise at all. And sometimes, after clicking on a direction on pronterface, it doesn't move immediatly but after 3 or 4 seconds.

I tried to calibrate the pololu drivers without multimeter, but no changes seen.

Sometimes I can work 5 minutes without problems, and sometimes it humms after only 5 seconds (without changes: same wiring and pololu calibration)

Heated bed is not connected and extruder is off (heat + motor).

What more can I do?

Thanks

Fred

Edited 2 time(s). Last edit at 07/28/2015 05:08AM by sfritz.

Just tried "RAMPS1.4_TestCode.pde" and all 5 motors (X, Y, Z1, Z2, E) are turning correctly.

Problem should come from options in Marlin or Sprinter.

Looking forward.

Are you sure about the 115200baud? Marlin is set to 250000baud by default.
-Olaf

Thanks for replying.
Yes, I'm sure, I tried both 115200 and 250000.
And if it were different in pronterface I couldn't connect to my Ramps card, but I can.

When I tried the test code, it worked correctly, but when connecting to pronterface with Marlin and Sprinter, it is jerky.

Edited 1 time(s). Last edit at 07/28/2015 12:34PM by sfritz.

Quote
o_lampe
Are you sure about the 115200baud? Marlin is set to 250000baud by default.
-Olaf

They changed the 1.0.3-dev tree to 115200 recently, FYI . . . not sure why, since it seems to be causing a fair amount of confusion . . .

To the OP:

Also, you don't say what your printer is, but if a Delta and you have a graphic LCD defined, that can cause stuttering, but not as bad as you note. This almost sounds like something is fighting for the USB port, and comands are being delayed. In Pronterface, you might try enabling 'Debug comm' and see what's transferring when.

- Tim

Edited 2 time(s). Last edit at 07/28/2015 03:09PM by tadawson.

Quote
tadawson
They changed the 1.0.3-dev tree to 115200 recently, FYI . . . not sure why, since it seems to be causing a fair amount of confusion . . .

The dev-tree is on 250000. As it was. I put my fork to 115200, but just changed it back. (btw 115200 is more common on linux machines like Raspberry Pi with Octoprint)

---

Triffid Hunter's Calibration Guide

--> X <-- Drill for new Monitor

Most important Gcode.

I could have sworn I saw 115200 in the mainline 1.0.3-dev tree as well . . . oh well . . .

- Tim

Hi,
my printer is a Prusa Mendel. I haven't a LCD screen, just the five motors, and the extruder resistance and thermistor.


I tried debug mode and I saw when I connect board with Pronterface it is OK, but once I plug external Supply, Pronterface sends messages, but never gets responses.

Exemple:
[INFO] SENT: M105
[INFO] RECV: ok T:87.0 /0.0 B:0.0 /0.0 T0:87.0 /0.0 @:0 B@:0
[INFO] SENT: M105
[INFO] RECV: ok T:86.6 /0.0 B:0.0 /0.0 T0:86.6 /0.0 @:0 B@:0
[INFO] SENT: M105
[INFO] RECV: ok T:86.2 /0.0 B:0.0 /0.0 T0:86.2 /0.0 @:0 B@:0
External Supply pluged
[INFO] SENT: M105
[INFO] SENT: M105
[INFO] SENT: M105
[INFO] SENT: M105
[INFO] SENT: M105

But the first time I pluged the external supply it worked...

I'm not sure where it comes from, but I have an idea: When the power supply is needed, it heats and at a moment its fan gets on. It seems that after the supply fan is on, pronterface gets no response back.
I'm not sure, I will try with an old computer power supply to see, just need to find one...

At the moment I'm using this supply.

Edited 3 time(s). Last edit at 07/29/2015 05:58AM by sfritz.

Something is wrong with your wiring or you have a shortcut/misfunction at the MOSFet section.
Usually there is no heat, just from plugging in the PSU. Also AFAIK the fan of the PSU is temp-controlled and wouldn´t run immediately.

-Olaf