NEMA 17 Steppers won't move

From the original Synthetos forum (2011–2025)

Started by WhiteElder on in TinyG Support. 4 replies, last activity Aug 28, 2014.

#

Using Stepper motor - NEMA-17 size - 200 steps/rev, 12V 350mA from Adafruit. and using a command as "g1 f400 x50" the motor will spin when it is accelerating and decelerating but only whine during the move.

What am I doing wrong?

Motor Settings
[1ma] m1 map to axis 0 [0=X,1=Y,2=Z...]
[1sa] m1 step angle 1.800 deg
[1tr] m1 travel per revolution 0.0492 in
[1mi] m1 microsteps 8 [1,2,4,8]
[1po] m1 polarity 0 [0=normal,1=reverse]
[1pm] m1 power management 0 [0=remain powered,1=power down when idle]
[1mp] m1 motor power level 1.000 [0.000=minimum, 1.000=maximum]

Staff #

What tinyG FW build are you running?

Screw machine? Screw binding?
Have you played with the current pots?
What PS voltage to tinyG?

Your $1tr is reported in inches.
Is your g1 command issued in inch mode (50 inches) or mm mode (50 mm = approx 2 in) ?

Staff #

Try this again in millimeters (G21). 400 Inches per minute is pretty fast! Or try a move at F15 if you stay in inches mode. Also, check your X axis settings. $x. It sounds like you have the maximum velocity and maximum feedrate settings too high for your motor. The motor will spin during acceleration, then stall, then spin again during deceleration.

#

Thank you for the assistant. Using F15 worked to get the motor running. New to g code and just following the example in the Connecting Tinyg page.

But to answer the questions I am using FV 0.97 on a TinyG V8 board. With a 24v/5a wago ps. I had played with the pots and with the feed but not down to 15.

Staff #

WhiteElder
I suggest caution when reading wiki and the Forum - most folks speak in mm mode, but it is often not obvious.
For example, I missed the fact you were calling for F400 IPM, rather than mm/min.
And, if you are running a screw machine, good to mention it.
A typical (Shapeoko) machine moves 35.xx mm/rev, compared to your machine.

Also, FV 0.97 does not say much either, better to report the FW build, eg build 435.10. FV are sort of major moves; we are still in the territory where the minor moves (builds) are important..

But you are moving - have fun!

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