'AVOID world-etrade on ebay' Help with new driver needed

[ampmeter]

Hi all,

I bought a 3040B cnc from world-etrade in December. Not the most accurate machine but good enough for my purposes.

However, it failed last month. I suspect the power supply.

Tried to contact seller but no response at all, (1 year warranty hahahaha!). Seems a common problem.

Could anybody suggest a way forward. I'd by a new power supply if I thought it was necessary, but in truth I know little of these things. Any ideas?

Regards,
R

[doorknob]

What exactly do you mean by "it failed"?

What are the symptoms?

I don't have experience with that specific machine, but if you can provide more info maybe someone can help.

Do you have any electronic test equipment (such as a basic digital multimeter) and experience using it (or do you have a nearby friend with equipment and experience)? Are you using a PC and Mach3 or something else?

[Al_The_Man]

A power supply is usually an easy thing to check, if you have to replace it and it is a switching type, consider a linear supply, it initially may cost a couple of $$ more, but not only more reliable, easy to fix.
Just my 2¢.
Al.

[ampmeter]

Hi,

When I switch the unit on, the power light is illuminated but there is no fan spinning and no power to the motors. I'll get a multimeter later today and will check for power from the power supply and report back. The switch itself is working because i disconnected a spade from it there was a small spark when reconnecting.

Richard

[mikemill]

Richard
I have had two power supplies go on my SyilX3 which they replaced, the supplies were rated at 48v but as the drivers are 48v not much room for spikes I gave up and bought two 60v supplies and wired then in parallel to spred the load and have had no problems for over a year now.
As many posts to this site bear out a lot of Chinese electrics are suspect and as they are not round the corner when things go wrong you'r up the swanny.
I have learned you only get what you pay for in life!!!
Good Luck
Mike

[ampmeter]

Sorry to hear about your problem Mike. Bearing in mind the cost, I guess I was never expecting miracles from this machine, overall I am pleased with it though. I 'm commited to spend a little extra cash if thats what'll make it work AND be reliable. Disappointed with the seller's support though.

Tested the supply this afternoon (GMT+0). Nothing coming from the power supply at all. I see a little fuse under the cover but can't get to it at present. From a simple inspection through the case it looks OK. Soon as I figure out how to get the perforated case off, I'll take a closer look and see if anything else noticably damaged. Nothing to lose at this stage.

Overall the electronic construction seems very poor. Wouldn't want to be a Chinese astronaut!

Anybody know of a U.K. company providing reasonably priced power supplies?

Cheers,
Richard

[Al_The_Man]

The R.O.C. supplies I have seen usually have a fuse in the AC input line only.
Have you though about putting a simple linear supply together yourself? only 3 basic components!.
Al.

[ampmeter]

Success,

Managed to 'bend' the case off. Checked the fuse which had blown. Replaced it, but still no luck. Then I noticed that one of the resistor leads on the track side of the board seemed very long. I suspected that it might have somehow touched the case so I cut it off, replaced the fuse wire again and now its working.

Thanks to all contributors for your help,
Richard