Dynomotion

Group: DynoMotion Message: 138 From: strohm81 Date: 2/19/2010
Subject: Snap Amp help
Hi Tom,

I recently acquired the Kmotion and 2 Snap Amps from my old school after the program took a different direction. They have been sitting quite a while and I plan to build a small mill of my own. Right now I have just the Kmotion and 2 amps hooked to a PC power supply and USB cable to update the firmware to 4.19, which loaded fine, but I noticed that the LEDs on both amps are not lighting up. As I recall they would blink until the C program was run. The short 16pin cable seems to be fully seated. Is there something I am missing or are there some troubleshooting steps to take?

Thanks,
Ben
Group: DynoMotion Message: 139 From: Tom Kerekes Date: 2/19/2010
Subject: Re: Snap Amp help
Hi Ben,
 
I just tried a KMotion + 2 SnapAmps with V4.19 and it works ok.
 
Not sure what the problem may be.  Were the lights blinking before you updated the firmware?
 
The "I'm alive" LEDS should always blink even after running the C program to set the peak current limits.  But after setting the peak current limits the fault light should go out.
 
You might try connecting one SnapAmp at a time (remove any jumper to address it as SnapAmp#0).  Disconnect everything except +5V to KMotion and the connection between KMotion to SnapAmp.
 
Check the 16 pin ribbon cable for any shorts.
 
Otherwise you can send it to us for diagnosis.
 
Good Luck
TK