Search found 1362 matches

by EmbeddedMan
Mon Nov 04, 2013 12:15 pm
Forum: SparkFun Product Questions
Topic: BigEasyDriver steppermode by software?
Replies: 2
Views: 663

Re: BigEasyDriver steppermode by software?

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...
by EmbeddedMan
Tue Sep 10, 2013 4:53 am
Forum: USB Development
Topic: Advise ? USB MSD+CDC for 2 Virt ComPort refers
Replies: 2
Views: 2256

Re: Advise ? USB MSD+CDC for 2 Virt ComPort refers

Sorry Gert - this is beyond my knowledge. I've only worked with the Microchip examples in the MLA (Microchip Library for Applications) - never really modified the USB descriptors much if a all. I have heard of problems under Windows (all versions?) with USB devices that try to be more than one thing...
by EmbeddedMan
Tue Aug 20, 2013 3:08 pm
Forum: SparkFun Product Questions
Topic: Easy Stepper Driver Doesn't Reverse Motor
Replies: 1
Views: 577

Re: Easy Stepper Driver Doesn't Reverse Motor

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.

*Brian
by EmbeddedMan
Mon Aug 05, 2013 12:13 pm
Forum: SparkFun Product Questions
Topic: EasyDriver Failure?
Replies: 3
Views: 575

Re: EasyDriver Failure?

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...
by EmbeddedMan
Sun Jun 23, 2013 9:44 am
Forum: SparkFun Product Questions
Topic: Big Easy Driver & Stepper Motor
Replies: 8
Views: 1257

Re: Big Easy Driver & Stepper Motor

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...
by EmbeddedMan
Sun Jun 23, 2013 9:41 am
Forum: Arduino
Topic: Help Needed With Stepper Motor Code
Replies: 5
Views: 768

Re: Help Needed With Stepper Motor Code

Try the code and setup here : http://www.schmalzhaus.com/EasyDriver/E ... 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.

*Brian
by EmbeddedMan
Thu Jun 20, 2013 12:32 pm
Forum: SparkFun Product Questions
Topic: Big Easy Drivers keep frying...
Replies: 9
Views: 1349

Re: Big Easy Drivers keep frying...

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...
by EmbeddedMan
Sun Jun 09, 2013 1:41 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: is it possible to initialise pic32 pin as in and output pin
Replies: 3
Views: 940

Re: is it possible to initialise pic32 pin as in and output

Yes. I'd use an open-collector output (almost every PIC32 pin can be used as an open-collector) on the pin. Then set the pin high. It will then allow the pull-up resistor on the motor driver board to pull the line high and enable the H-bridge. Then, if there's a fault, the motor driver will pull the...
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: 600

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

Digitizer,

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.

*Brian
by EmbeddedMan
Tue Apr 23, 2013 12:10 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: UBW32 and xc32
Replies: 6
Views: 1384

Re: UBW32 and xc32

Very cool Metro. Are there any other changes needed to compile and run the example using XC32? I'd love to get updated example code on the UBW32 website soon.

*Brian
by EmbeddedMan
Tue Apr 23, 2013 12:09 pm
Forum: USB Development
Topic: UBW no longer working after programming device incorrectly
Replies: 12
Views: 4181

Re: UBW no longer working after programming device incorrect

Ahh, yes. I believe that error (in the PDFSUSB.exe app) may have to do with an older version of .NET on your machine. Can you try downloading and running the .Net v3.5SP1 installer ( http://www.microsoft.com/en-us/download/details.aspx?id=22 ) and see if it fixes the problem for you? Let me know eit...
by EmbeddedMan
Mon Apr 08, 2013 11:40 am
Forum: USB Development
Topic: UBW no longer working after programming device incorrectly
Replies: 12
Views: 4181

Re: UBW no longer working after programming device incorrect

Since you are programming only the bootloader HEX file with the PK3, after you get that step done you will need to program the UBW with the firmware version that you wish to use. It appears that PDFSUSB.exe is able to see your board in bootloader mode, correct? So just download the HEX file for the ...
by EmbeddedMan
Fri Apr 05, 2013 6:32 am
Forum: USB Development
Topic: UBW no longer working after programming device incorrectly
Replies: 12
Views: 4181

Re: UBW no longer working after programming device incorrect

So the good news is that it's _really_ hard to damage the PICKit. Microchip designed it pretty well. As far as UBW connections - the trick is that you need the following 5 lines: (in order, starting from pin 1 of the PICKit connector) MCLR, Vcc, GND, RB7 (PGD), RB6 (PGC) (note that you do NOT need t...
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: 933

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

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...
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: 933

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

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...