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

[JAZZCNC]

Should still be under warrenty shouldn't it.?? . . Or is that has much use as the spindle.!!

[camhguh]

Should still be under warrenty shouldn't it.?? . . Or is that has much use as the spindle.!!

lol jazz, the list is getting longer by the day!

[Musht]

The Z axis wiring fracture is contagious, mine is just exhibiting identical symptoms.

There`s a cheep Chinese mill FAQ to be started here....
Current small Chinese mill FAQ thoughts ;-)

Out of the box;
Check the connections inside the control box.

( had E-Stop button connected to limit switch header on parallel breakout)

Check the bolts on the frame for loose or stripped threads.

(Stripped thread on carriage bolt, worked loose, no problem space to put bolt in place)

Check the life left on spindle brushes.

(couple of premature spindle failures reported)

Make up 4 core stepper driver and 2 core screened loom for Z- axis and spindle for when the original fails.

(early failures reported)

Cheers
Adam

[camhguh]

Well surprise surprise...yet another issue....y axis now misbehaving....similar to z axis problem so guessing that yet another cable needs replacing!! ho hum!


Edit: Yep replaced cable...now running ok again...PITA!!!

[John S]

Got a single speed Kress here if you are stuck and a mounting.

[camhguh]

Got a single speed Kress here if you are stuck and a mounting.

Thanks for the offer John, not had a chance to take this piece of crap apart yet to see if its recoverable...will do so tomorrow and decide what's best way forward.

Edit: Stripped it down and cleaned out gunge and brush/spring remmants etc.
Bottom bearing dosnt feel right but will run it later to test.

Ran it but its eating the brushes and sounds terrible...probaly bearing problems..

[Musht]

Todays update, its not Z-Axis wiring , its the Z-axis driver, new loom to z worked for about 3 seconds before the driver chip let the magic smoke out.

Guessing ite because tiny fan only breezes over X Y heatsinks leaving Z to cook itself.

Anyone got a spare TB560AHQ that they could sell, paypal waiting?

[John S]

Sure you got the wiring right ? Seems funny if it worked intermittently but 3 seconds after you put a new cable on it goes Phut.

Wouldn't be the first time says John S who *has never ever * done this :whistling:

[Musht]

Going to double check wiring and report back , but description of after `repair` action not entirely accurate.

It did same as it was doing , i.e. random reverse of commanded jog, then wirked properly for about 3 seconds before smoking the driver.

If anyone is familiar with the YOO CNC boards , take it green LED is +V supply and red is something to do with step, very flickery red LED on dying board just before smoking.

(edit) Now got a spare on the way thanks to another member :-)

[camhguh]

Anyone know where i can obtain the original spindle motor carbon brushes from ? (other than waiting from china)

They are approx 6mm x 3mm x 10mm