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23-04-2013 #1
Hi All,
I would be grateful for some help to make my first step :D
I am using the following items:
1x arduino - for step signal
1x sigma 5120 driver
1x 60BYGH401-03
1x 36v psu
1x ATX psu
I have the motor wired in bipolar series configuration following the datasheet, the 36v psu and a 5v rail from the ATX psu are connected to the driver.
Using the arduino I am outputting pulses to pin 6 I have tried various pulse lengths from 50 microseconds to 200 and also in the milisecond range from 50 to 1000.
Currently there appears to be holding torque on the motor and an audible hum, it also warms to the touch so I assume that the motor is wired up correctly. Upon sending pulses to pin 6 the hum frequency changes slightly but there is no actual movement.
Any idea's / suggestions on what I may have missed would be greatly appreciated!
Thanks,
Sam
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23-04-2013 #2
Not saying I can help, but it would likely help the overall troubleshooting this if you took some DVM readings on your pins (for all the pins in play as per Section 2.5 of the datasheet).
Also section 4.1 of the datasheet tells you the possibilities for a holding torqe/no step scenario - have you checked all their suggestions?
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23-04-2013 #3
Have got the enable pin (11) set correctly? if this is low this will act as a brake. Have you tried removing the Arduino and just hold the step wire to ground? this will test the motor and driver, when fault finding it is best to remove as many items as possible and rebuild piece by piece until the fault is found. Have you got all the grounds connected?
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24-04-2013 #4
I have got enable unconnected, I have tried grounding it which results in the loss of holding torque. I tired this morning to hold the step wire to ground and nothing happened :(. I guess I need to test pin 6 to make sure that its soldered correctly and double check for any shorts. It does seem odd tho that when sending step signals it does sound like its trying to do something.
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24-04-2013 #5
This is what should happen. When your drive is disabled it is NOT holding (RTFM) So far so good - leave enable disconnected.
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.
What is the step pulse MARK and SPACE from your Arduino? The timing sheet on page A-3 is a bit crap in that it gives the step clk width to the LOW and yet it says previously that it steps on the rising edge. Anyway if you arrange your Arduino to give a square wave of equal mark, space at around 50Hz it would be reasonable.
Make sure as well as your Arduino to driver pin6 step wire you've also connected the arduino GND also.
If that doesn't do it you may want to post your Arduino sketch for checking.
IanLast edited by stirling; 24-04-2013 at 03:59 PM.
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24-04-2013 #6
Doubt it'll help but maybe worth connecting pin 7 (direction) to be definitely either high or low? It should default to one way or t'other if left unconnected but might just be worth a try...
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Edit - scratch that - it says in the manual it defaults to clockwise if unconnected. As you were...Last edited by bikepete; 24-04-2013 at 04:29 PM.
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