Low voltage detected and Error (return code=8)


#1

Dear all,

After the HV channel test and calibration, I’ve prepared 1st device and started the test of drop movement.

However, I’m facing difficulties in Microdrop behaviors as follow.

  1. Microfrop boot up successfully with my device configuration. (Picture1)

  2. HV amplifier switched ON.

  3. Check Realtime mode checkbox --> pop-up window says, “Low voltage detected. Please check that the amplifier is on.” (Picture2)

Click [OK] --> pop-up window says, “wheelerlab.dmfcontrol_board plugin crashed processing set_voltage signal. Reason: Error sending command 0xA8(168). Return code=8.”(Picture3)

Surely, “set_voltage=100.0, measured_voltage=0.2, error=-99.8%” statement is found in console window. (Log.txt)

Did you have similar experience or know the possible cause?

Any kinds of suggestion or advise will be truly helpful.

Aki@U-tokyo


#2

log.txt (8.18 KB)


#3

Would you please send photos of your instrument setup showing cable connections? That will help to isolate the issue.

Thanks,

Christian

···

On Thu, Oct 27, 2016 at 3:30 AM ytoyo...@nojilab.t.u-tokyo.ac.jp wrote:

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#4

It sounds like either:

a) the cables are not connected properly

b) the signal generator isn’t working
c) the amplifier isn’t working

d) there’s something wrong with the control board’s ability to read the HV signal

After you’ve verified the cable connections (a), if you have an oscilloscope and a T-splitter, e.g.:
http://www.ezwatch.com/media/catalog/product/cache/1/image/400x260/9df78eab33525d08d6e5fb8d27136e95/b/n/bnc-t-connect.png
you could check the voltage going into and out of the amplifier which would check b and c.

-Ryan

···

On Thu, Oct 27, 2016 at 7:33 AM, Christian Fobel chri...@fobel.net wrote:

Would you please send photos of your instrument setup showing cable connections? That will help to isolate the issue.

Thanks,

Christian

On Thu, Oct 27, 2016 at 3:30 AM ytoyoshima@nojilab.t.u-tokyo.ac.jp wrote:

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#5

Christian, Ryan,
Thanks a lot for your comment.

After the several trial, I supposed to find the cause of errors. Sig.Gen 5V/20V selection jumper was set on 5V position.

Jumper was changed to 20V and MicroDrop looks working properly.

Although still droplet movement is not confirmed, system looks OK. There might be the reason in the test fixture or device itself.

I’m going to debug them step by step.

Thanks again for your advise, anyway.

Some pictures of our Dropbot system are attached.


#6

Hi Aki,

Thanks for the update. I’m glad to hear that you are able to get the expected waveform from the signal generator board. I assume that you are also able to measure the correct waveform from the amplifier output (i.e., the high voltage input signal on the control board)?

I wish you luck in your next debugging steps. Please let us know if you have any questions.

Thanks,

Christian

···

On Mon, Oct 31, 2016 at 4:47 AM ytoyo...@nojilab.t.u-tokyo.ac.jp wrote:

Christian, Ryan,
Thanks a lot for your comment.

After the several trial, I supposed to find the cause of errors. Sig.Gen 5V/20V selection jumper was set on 5V position.

Jumper was changed to 20V and MicroDrop looks working properly.

Although still droplet movement is not confirmed, system looks OK. There might be the reason in the test fixture or device itself.

I’m going to debug them step by step.

Thanks again for your advise, anyway.

Some pictures of our Dropbot system are attached.

You received this message because you are subscribed to the Google Groups “dropbot-dev” group.

To unsubscribe from this group and stop receiving emails from it, send an email to dropbot-dev...@googlegroups.com.

For more options, visit https://groups.google.com/d/optout.


#7

hey Christian,

i started the microdrop software after some days of not using it. It opened and then asked me to install some updates. Now it doesnt properly start the software anymore. It keeps crashing after it asked me

to allow a modification / installation of some pything.exe thing and shuts down immediately after i click "ok". Dont know what this is about...

Any fixes?

Best,

Rüdiger