ebay 3-axis TB6560 curiosity

[techguyav]

I have recently modified a Hermes 5000 engraving machine with a dremel head and 3-axis TB6560 driver board. This is my first machine and I relied heavily on this forum in modifying it. I wanted to share my experience with the ebay driver and see if anyone has an explanation for a curiosity I found.

As several people have already experienced, the driver is not capable of the 36V that is advertised. I took others' advice and I'm only running it on a 24V, 10A, high-quality power supply. I'm not sure of the stepper brand on the Hermes, but they are 2.8A steppers. At 24V they're only warm and have enough power that I can't stop them by hand, good enough for my purposes.

At full step or 1/2 microstep, it makes the steppers scream and shake like the machine is coming apart. We had particularly bad shake at 8ipm. At 1/8 microstep they're quiet and smooth.

I have the buffer setting on fast. I tried the other settings and couldn't tell any difference. Maybe someone can enlighten me on what that does.

I started with current on 100%, but was having a "popping" noise coming from 2 axes and missed steps. I thought it was a mechanical issue, but just flipped the current switches to 75% on a whim and the popping stopped. Now all 3 axes are smooth as can be, quiet, and don't miss a step. Does anyone have an explanation for this?

[gothdragon]

i am haveing bad problems with it so don't feel bad at lest you got your's working lol

mine is odd i can't get my y axle to work it make's sound and shack's the table thot it was the motor but i switched the cable's to x and the motor was fine

now i thank im going to buy a nothere board from somewhere els unless i can figer this out

[techguyav]

Sounds to me like you have the y-axis stepper mis-wired.

[leaveme]

visit following thread. you have answer there.
How I fixed my Chinese TB6560 controller (updated) - CNCzone.com-The Largest Machinist Community on the net!