Now I’m installing 2nd DropBot system and facing strange trouble. Output voltage is low, around 1/3 of setted value. Just after Real-time-mode checking, “failed to achieve the specified voltage” message was popped up. Profile log also says the same message like attached file(log.txt).
My installation record is following.
(1) signal generator
Using Arduino-IDE and FTDI cable, boot-loader and firmware are burned succesfully.
Board calibration was carried out. 5Vp-p output is adjusted to 250mV by set_pot command.
(2) HV switching board
Boot-loader and firmware are burned. Serial monitor output looks OK.
(3) controler board
Stacked on Arduino MEGA and firmware was flashed. Firmware was confirmed using Arduino IDE.
(4) Building up and cabling of DropBot
(5) channel_test, calibration_device_load, calibration_reference_load were carried out. Each results looks correct like attached pictures(ch_test.jpg, calib_device_load.jpg, calib_ref_load.jpg).
(6) Low voltage was found at 1st trial of experiment.
Internal node waveform of signal generator board were monitored to investigate the reason for both working 1st system and 2nd one with trouble(waveform comp.docx).
It seems to show that low pass filter function is working well but there might be some errors in amplitude adjustment circuit. However, it looks strange the calibration steps(5) look OK.
I’d like to have your advise to debug this issue and suggestion about another check point and/or testing.
Aki @Univ. of Tokyo.
log.txt (16.5 KB)
waveform comp.docx (1.48 MB)