Help Make 1st Step - Wiring Up Drivers to Motor and Arduino

[Ross77]

I would try connecting enable pin 11 to high as I beleive that leaving floating can cause it to be unstable, especially if you haven't got all the grounds connected in star. at least if you make it high then the drive will be enabled and you can cross it off the list.


Have you got a logic probe? these are good for testing logic status and detecting floating and ground issues

This is also as it should be. If you RTFM it says steps occur on the RISING edge so holding it to GND will do nothing (except that when you remove it from GND - IF it has a pull up resistor it should step ONCE.

Ok pulse it with 5v then. If it doesn't work by pulsing the step pin I doubt that it is the Arduino, would indicate a motor/ driver issue. Have you got any other motor or drives, would help establish if it is a hardware/wiring problem or software.

[stirling]

I would try connecting enable pin 11 to high as I beleive that leaving floating can cause it to be unstable, especially if you haven't got all the grounds connected in star. at least if you make it high then the drive will be enabled and you can cross it off the list.

Well I'm just suggesting things according to WHAT THE DATA SHEET SAYS which is that you can leave the enabled disconnected which will default to ENABLED. This implies it is NOT floating but is held high by an internal pullup. it'll certainly not do any harm to try this BUT as the OP has already said that the motor is HOLDING, it HAS to be enabled already as a disabled drive would allow the motor to be spun freely.

According to the data sheet test procedure the drive is behaving exactly as it should - so far. The ONLY thing that ISN'T happening is it isn't stepping and again according to the test procedure IN THE DATA SHEET the next thing to check is the step signal source. Hence my suggestion to check the Arduino GND is connected (a very commonly missed thing in Arduino land) and that the sketch is actually doing what he thinks it should. That's all.

Ian

[Treemonkey]

Well I have had a poke around for 20 minutes this morning. And I couldn't really tell you what I did but It did start up and chugged a couple of steps.... then stopped again

I have tested the arduino output and that is fine.

It started up after i put the direction pin to ground unless I accidentally tapped another pin, I will have another read of the datasheet. It seemed as though it had remembered a sequence of steps / directions and then after getting the nod did them then promptly stopped again. I tried to re-create what happened but had to leave for work!

Guess that's progress :D

[Ross77]

I will have another read of the datasheet.

Yes i think that reading THE DATA SHEET is the best course of action.

If you do get stuck you could see if there is a forum for CNC related issues and ask someone for help

[stirling]

You might want to also double check you have the motor phases connected correctly.