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Re: BigEasyDriver steppermode by software?

 by EmbeddedMan ¦  Mon Nov 04, 2013 12:15 pm ¦  Forum: SparkFun Product Questions ¦  Topic: BigEasyDriver steppermode by software? ¦  Replies: 2 ¦  Views: 706

Also note that the Big Easy Driver can be set to use 3.3V or 5V logic power - make sure you set that properly for the output voltage of the controller board you're using to send the signals to M1, M2 and M3. But yes, connecting them directly to output pins of the controller board should work. Verify...

Re: Easy Stepper Driver Doesn't Reverse Motor

 by EmbeddedMan ¦  Tue Aug 20, 2013 3:08 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Easy Stepper Driver Doesn't Reverse Motor ¦  Replies: 1 ¦  Views: 617

Quick update on this -wperko and I have been corresponding via e-mail about this issue. Looks like there was a partial short on the DIR pin of the EasyDriver, and so the BS couldn't get it to 5V. Another ED solved the problem.


Re: EasyDriver Failure?

 by EmbeddedMan ¦  Mon Aug 05, 2013 12:13 pm ¦  Forum: SparkFun Product Questions ¦  Topic: EasyDriver Failure? ¦  Replies: 3 ¦  Views: 640

Any chance any of the four wires from the BED disconnected from the motor while power was applied? That will sometimes produce the failure you are describing. Also, have you tried adjusting the current limit pot at all while running the motor? That can sometimes get bumped, and you may need to reset...

Re: Big Easy Driver & Stepper Motor

 by EmbeddedMan ¦  Sun Jun 23, 2013 9:44 am ¦  Forum: SparkFun Product Questions ¦  Topic: Big Easy Driver & Stepper Motor ¦  Replies: 8 ¦  Views: 1330

As a followup, mdne e-mailed me, and we went through a lot of troubleshooting steps. We confirmed that the pulses were getting from the Arduino to the BED. We confirmed that the BED had good power, and that the output stages looked like they were doing the right thing. But the step pulses were not a...

Re: Help Needed With Stepper Motor Code

 by EmbeddedMan ¦  Sun Jun 23, 2013 9:41 am ¦  Forum: Arduino ¦  Topic: Help Needed With Stepper Motor Code ¦  Replies: 5 ¦  Views: 912

Try the code and setup here : ... mples.html to see if your setup is working properly. If that works, then you can try and see what's different about your code. If that doesn't work, then there may be a problem with your setup.


Re: Big Easy Drivers keep frying...

 by EmbeddedMan ¦  Thu Jun 20, 2013 12:32 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Big Easy Drivers keep frying... ¦  Replies: 9 ¦  Views: 1506

The Big Easy Driver does actually have protection diodes built into the A4988 driver chips. However, they will not tolerate a larger stepper motor being driven with the power off. For that, you'll need some hefty diodes of your own added to each of the four motor lines. If you plugged an Big Easy Dr...

Re: 2D Digitizer using Easy Driver, LabVIEW, and Arduino UNO

 by EmbeddedMan ¦  Tue Apr 23, 2013 12:17 pm ¦  Forum: SparkFun Product Questions ¦  Topic: 2D Digitizer using Easy Driver, LabVIEW, and Arduino UNO ¦  Replies: 1 ¦  Views: 738


Tell us exactly what motors you are using, and we can suggest a proper setting of the current limit pot on the EasyDriver. That should help a lot.

Note that, under normal use, the chips on the Easy Driver will get very hot.


Re: Anyone ever have problems getting 1/16 step with BED

 by EmbeddedMan ¦  Sat Mar 23, 2013 7:15 am ¦  Forum: Arduino ¦  Topic: Anyone ever have problems getting 1/16 step with BED ¦  Replies: 8 ¦  Views: 1000

Dave, That is very strange indeed. Can you post me a link to the stepper motor you are using? If you set MS1, MS2 and MS3 low (by tying them to ground - i.e. full step mode) and send exactly 800 pulses, you should get 1 revolution. If you get something different than that, then you may not have a .4...

Re: Anyone ever have problems getting 1/16 step with BED

 by EmbeddedMan ¦  Fri Mar 22, 2013 7:57 am ¦  Forum: Arduino ¦  Topic: Anyone ever have problems getting 1/16 step with BED ¦  Replies: 8 ¦  Views: 1000

Hmm, OK good. So you've tried the obvious stuff. When you say that the 16 microstep mode doesn't work - how exactly are you testing it? How does it behave differently than 1/8ht mode? Another thing to try is to remove all wires from the MS1, MS2 and MS3 inputs on the BED and measure the voltage on e...

Re: UBW32 timer problem

 by EmbeddedMan ¦  Thu Mar 21, 2013 11:46 am ¦  Forum: SparkFun Product Questions ¦  Topic: UBW32 timer problem ¦  Replies: 3 ¦  Views: 394

Sorry, I don't see a project attached to your post, just a single .c file. I need to be able to see all of your project settings, thus the request for the project files.


Re: Anyone ever have problems getting 1/16 step with BED

 by EmbeddedMan ¦  Thu Mar 21, 2013 11:45 am ¦  Forum: Arduino ¦  Topic: Anyone ever have problems getting 1/16 step with BED ¦  Replies: 8 ¦  Views: 1000

The trick for 1/16th microsteps is to make sure that your power supply voltage is high enough, that your motor coil resistance is low enough, and that your current adjustment pot is set low enough. Do you know these parameters for your system? If your power supply is 12V or higher and your coil resi...

Re: UBW32 timer problem

 by EmbeddedMan ¦  Mon Mar 18, 2013 3:30 pm ¦  Forum: SparkFun Product Questions ¦  Topic: UBW32 timer problem ¦  Replies: 3 ¦  Views: 394

kginbg, Can you point me to the project where you got the Timer 1 API Example Code? I'd like to try to compile it. Or better yet, zip up your entire project directory and post that so I can see exactly what's going on. In general, you never want to set config bits in an application that is going to ...

Re: LabVIEW and EasyDriver

 by EmbeddedMan ¦  Fri Mar 15, 2013 2:55 pm ¦  Forum: SparkFun Product Questions ¦  Topic: LabVIEW and EasyDriver ¦  Replies: 2 ¦  Views: 1011

You will need to supply the ED with more than 5V. It's minimum is 7, I suggest 12. Don't worry, it can't supply more than 750mA/coil, and your motor can handle that just fine. Hopefully that will help. Also, the step is taken on the rising edge of STEP, not the falling edge. But that probably doesn'...

Re: mercury stepper motor won't energize

 by EmbeddedMan ¦  Wed Mar 06, 2013 8:40 pm ¦  Forum: SparkFun Product Questions ¦  Topic: mercury stepper motor won't energize ¦  Replies: 22 ¦  Views: 1576

Daniel! That's excellent news. I'm so glad your system is working now. How did you discover to re-do the splice?


Re: mercury stepper motor won't energize

 by EmbeddedMan ¦  Tue Mar 05, 2013 9:51 pm ¦  Forum: SparkFun Product Questions ¦  Topic: mercury stepper motor won't energize ¦  Replies: 22 ¦  Views: 1576

Sure. Take your meter on the low ohms setting, and measure between each wire of the motor to all others. You should find that the two coils should have a very low resistance (look on the datasheet for your motor - but not zero ohms), and there should be almost infinite resistance between the two coi...

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