Ebay Chinese Routers (CNC3040) - anyone purchased one of these machines recently?

[Musht]

Thanks to another member purchased a spare TB IC in the post.

Easiest to remove them by snipping all the pins off the chip , then mop up the solder and pins off the PCB.

Mounting new IC is straightforward, it clips over the board and holds itself inplace whilst soldering.

Unfortunately in this case , didn`t entirely solve the problem, Z fine going down, stalls and whines going up, hmmm

Transfer to Y axis , whines, lack of power.

PCB back under the magnifier, toasted thin ground track from what looks like 1R0 current sense resistor, put wire in from nearest pad to ground pin.

Result, fully working Z axis driver board.

Just one wiring anomoly now, must have reversed ppahses because motor is runnig reversed, up is down and down is up, do I have to get the soldering iron out again or can I reverse it in Mach3?

Cheers
Adam

P.S. Also contacted vendor, who has asked for a picture of the damaged board so that they can send me out the right spare part under warranty, have just repaired in meantime to keep running.

[JAZZCNC]

Just one wiring anomoly now, must have reversed ppahses because motor is runnig reversed, up is down and down is up, do I have to get the soldering iron out again or can I reverse it in Mach3?

Yep go to ports & pins-Motor outputs and change Dir lowactive. So if ticked un-tick or vise versa.

[camhguh]

Before I forget yet again, a public thank you to JohnS for the loan of a single speed Kress (he also machined up a collar to make it fit inside the original motor clamp) allowing us to carry on machining!

[JAZZCNC]

Before I forget yet again, a public thank you to JohnS for the loan of a single speed Kress (he also machined up a collar to make it fit inside the original motor clamp) allowing us to carry on machining!

Aww dispite what every body says about him he's a nice old bugger.!!. .

[Scott]

Sorry to jump in on this thread but i have the 3040 mill how did your machine handle the extra weight of the kress???
becouse i have the small 0.4kW (0.54HP) arc eurotrade highspeed spindle i`m thinking of fitting to mine