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Re: Stepper Motors not Moving

February 22, 2019, 1:47 pm
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Could it be, that your ENABLE signals for the stepper drivers are inverted?

Configuration.h:
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// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
// :{ 0:'Low', 1:'High' }
#define X_ENABLE_ON 0
#define Y_ENABLE_ON 0
#define Z_ENABLE_ON 0
...
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Re: Stepper Motors not Moving

February 22, 2019, 1:53 pm
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I’m not home right now, but I’m guessing those should be 1 instead of 0
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Re: Stepper Motors not Moving

February 22, 2019, 3:48 pm
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It depends on your stepper drivers, most pololu type drivers are active low.
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Re: Stepper Motors not Moving

February 22, 2019, 5:26 pm
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I am using bipolar NEMA 17 motors with polulo DRV8825 stepper drivers, the purple ones
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Re: Stepper Motors not Moving

February 22, 2019, 6:20 pm
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Re: Stepper Motors not Moving

February 24, 2019, 11:13 am
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They were set to 1, I changed them all to 0 but when I try to upload the new firmware I get this error message for my Conditionals_LCD.h file for literally every line



expected constructor, destructor, or type conversion before numeric constant

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
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Re: Stepper Motors not Moving

February 24, 2019, 11:59 am
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Given that Conditionals_LCD.h is included just after Configuration.h, it looks as if you have changed something else than just the 1s to 0s in your Configuration.h. Double-check your changes...
If you don't find the problem, post your modified Configuration.h here so we can have a look look at it.
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Re: Stepper Motors not Moving

February 24, 2019, 1:22 pm
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What I found to work is just copying the default Conditionals_LCD.h into mine and now everything works, the motors finally spin, thanks guys!
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TMC2208/TMC2130 short circuit protection is disabled by default :(

March 13, 2019, 9:34 am
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I was wondering what the reason is for the TMC2208 driver used in Marlin to have short circuit protection disabled for both the low side and high side MOSFETS's ?

I've enabled the short circuit protection with so far no ill effects by adding the following into the TMC driver section in Configuration_ADV.h file (we use UART comms from MCU to each TMC2208) ..

  // enable low-side and high-side short circuit to ground output mosfet protection
  #define TMC_ADV() { \
		stepperX.diss2g(false);  stepperX.diss2vs(false);  \
		stepperY.diss2g(false);  stepperY.diss2vs(false);  \
		stepperZ.diss2g(false);  stepperZ.diss2vs(false); \
		stepperZ2.diss2g(false); stepperZ2.diss2vs(false); \
 	}

The reason we want the protection is because we already blew a TMC2208 driver chip when testing them (an exposed stepper motor wire accidently touched 0V).

The protection is no doubt disabled for the TMC2130's as well, but not looked at the TMC2130 driver code so can't yet confirm that.
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Re: TMC2208/TMC2130 short circuit protection is disabled by default :(

March 13, 2019, 10:58 am
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Strange indeed, if that's true. RepRapFirmware enables short circuit protection on TMC2208/2224, TMC2660, TMC5130 and TMC 5160/5161 drivers by default.
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Re: TMC2208/TMC2130 short circuit protection is disabled by default :(

March 13, 2019, 2:50 pm
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Well, I wouldn't mind a duet 2 wifi with the reprap firmware !

When we're done with this horrible mks rubbish (hardware/soldering faults are many with brand new controller & driver boards) and marlin we will get a duet for sure.

In the mean time, we'll battle our way through the sub-low end :( .. not by choice I should add - at this present time.
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NEMA 11 stepper motor, one phase down

March 26, 2019, 3:23 am
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Just to share my mistake B)-

For my dual extruder I use NEMA 11 stepper motors, 0.67 Amp/phase. ( [www.thingiverse.com] )
These light stepper motors can easy go down when powered with a higher current as specified. Per mistake I fired one up with 1.5 amp and immediately one phase was gone.
When it happens you can conclude this by measuring the resistance from the 2 phases. (see motor spec) Both phases should be close to equal. Mine should be 6 ohm and measured 2.3 and 6 ohm.
Good luck printing
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Re: NEMA 11 stepper motor, one phase down

March 26, 2019, 5:01 am
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Time to move to a NEMA14, more torque for the same weight :)
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hybrid p.m. step motor, how to connect it?

April 1, 2019, 1:14 am
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hi, i got this motor from a friend who couldn't figure out how to run(maybe damage it while trying).

it has 6 cables which look standard but there is also another piece screwed behind with 4 cables, it writes drain shield on it, not sure if it should mean anything.

product name is: ELWOOD GETTYS M21-23E-6108CU with Quantum Devices QPhase 3025A501

i see these two pieces work together commonly but couldn't see any info that what for.

i also have spare tb6560 driver, would it work if i connect to this driver?

motor says 1.4V rated volt. and 3.8 amps rated current which i am not sure if fits with tb6560.
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Re: hybrid p.m. step motor, how to connect it?

April 1, 2019, 2:43 am
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The 4 cables is an encoder. It can be ignored for now...

A place to start is to put a multimeter on the 6 cables, work out what is connected to what...
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Re: hybrid p.m. step motor, how to connect it?

April 1, 2019, 3:36 am
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red, red-white and black are connected with each other and green, green-white and white is another connected group.

i think it's like that

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Wire gauge

April 9, 2019, 4:48 pm
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Nema 17, 24v system, about 24” to the controller.

Awg 18 stranded wire ok???
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Re: Wire gauge

April 9, 2019, 5:41 pm
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You need to tell us the stpper current also.. as that is required to work out safe wire gauges
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Re: Wire gauge

April 10, 2019, 5:01 am
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Re: Wire gauge

April 10, 2019, 5:12 am
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