I’ve already written that sucker off months ago. It had signs of rework already. Maybe a factory second or a refurb/return. It had quite a bit of corrosion or chalky deposits on most of the metal parts. But my current drivers use the same chips so I might look up the data sheet anyways.
@Michael_Bridak_K6GTE
The Toshiba data sheet suffers from a bit of a far eastern twang in its English but it is nothing compared to the Chinglish of the board instructions. Plus Toshiba has far less of an agenda to push too. So yeah, get the chip data sheet for a greater understanding of your motor drives. Like I said the key to maximum performance is sizing the current sense resistors to your motors then jacking the settings up to 100%. But read it from the data sheet, and believe it from seeing it too.
Another thing that I did to help me see things while I was performance tuning my drives was I ran my drives through an analog ammeter. That is an illuminating experience that is worth mentioning at least. There is nothing quite like directly seeing power consumption when one is trying to maximize power output. Well, maybe if you have a little dynometer hanging around, but ammeters are easier to come by for me.
If you are going to perform the ammeter test it is best to ramp the motor speed up while you’re doing it. Because current consumption will change as the speed does. Exactly what current draw is at various speeds is the most enlightening part of the procedure too.
Observe the change a few times while you’re at it. It’ll be constant but you really want to have the chance to soak in what you’re seeing. Digital meters are not as good for this test either. They don’t display the trend nearly as well.