Driver goes unidirectional

[Clive S]

Have you tried putting 5V on the dir pin to see if it reverses I also have a faulty driver doing the same it could also be the opto blown if it has one

[cropwell]

It's a good idea Clive, but the input to the driver is on an IDC 2x4 pin connector and the documentation is in Chinglish. I have had to make an adapter to fit these drivers to a normal BoB, as the original BoB went up the Swanee a long time ago. I have got 3 Parker Digiplan drivers spare, so I might just wire one in place. An alternative is to get this kit and use the drivers. I have now opened up the driver and taken the circuit board out. It looks as though it was made in a shed, the soldering is poor and there is flux residue everywhere. I have cleaned it up, but hold out little hope. The optos look like 1L6704, at least that's the marking on IC's where optos ought to be.

I'll plug it back in and try it, just for fun.

I am annoyed with myself for buying the original kit from those people in Devon as it was overpriced and obsolete when they sold it. Support from them was non-existent, so I would not even think about any help now.

I have been trying desperately to get the machine up an running, as I have 18 carved wood blocks to make, and other jobs are waiting on it.



http://www.ebay.co.uk/itm/CNC-Kit-3-...gAAOSw3KFWeMq5

[uli12us]

www.go-gddq.com/down/2011-12/11120306392857.pdf

In this manual you'll find anything.
page 8 is, how you must connect Step=CW and Dir=CC
If I understand it right, free must be open or L if the motor should run.
If you have problems with connection to the small 16 pin connector, there are single pin and socket wires from chinese dealers for breadboards.
These parts you can use for connecting.
http://www.ebay.de/itm/40-Pin-Dupont...sQGpeVGeF_So5Q

[cropwell]

Hi - uli12us,

It all worked yesterday

This is the adapter I made. I think the way forward is to get the 3 m542h kit and wire it up properly (with real wire !)

Anyway it is late and I give up for tonight !

[Clive S]

Rob Did you locate the problem then

[cropwell]

No Clive, I just ordered the M542H kit for £110. The drivers I have got are rubbish anyway and obsolete. As I said in an earlier post (now archived), it is all out of date Chinese kit. The original BoB and these drivers were made by Tonman and there seems to be only one supplier in the UK who is selling a 3 axis controller box for nearly £900 with these inside.

It saddens me that there seems to be a number of CNC machine makers in the UK who are basically rip-off merchants. Dicey practices seem to abound and companies are selling flimsy, poorly designed, over-priced kit to companies and individuals, who buy on the expectation of customer service and support. It is a world of CNC dishonesty.

Happy New Year !