Upgrade? Chinese CNC Machine

[Jonathan]

Might not even need to get a new PSU to use with the m542 drivers. The transformer says 36V on one of the secondaries, which is ideal since when rectified that will give just under 50V. It depends what rating that winding is on the transformer, but you might as well try it if you do decide to get the drivers that John S (and I) recommend. Do you have a part number / datasheet for the stepper motors this machine uses?

[John S]

Yes spotted that as well, even included it in the post that disappeared when I clicked on the picture again to check.
I reckon the tranny will kick enough out given that these motors only take a bit of power and volts on these things is far more important than amps.

When you have had your fingers in a switch on electric toaster you get a feel for these sort of things.

[Jonathan]

The motors look fairly small, so I tend to agree. However I've just noticed that the 36Vac output will be for the spindle, since that requires up to 50V and 230W according to the eBay listing. Unless that spindle is replaced another transformer would almost certainly be needed.

Still interested in that board that rectifies the current from the tranny.
I reckon they must be commercially available boards if they are in that box.

Hard bit is know what to search for on Ebay.

Er why, surely you don't want one? It looks like it does a bit more than just rectifying though - I think it does the PWM drive for the spindle.

[John S]

Well spotted and that also answers the question of the pot on the front so scrap that query.

The reason I wanted one is that is often quicker, faster, cheaper in the long run to buy off the shelf components than build.
You then also have the facility to just ship a component out in the event of a fry up.

However in this case it's not what I was looking for.

[Jonathan]

You want something like this then?

10000uF 50V X4 Rectifier filter power supply board kit s-8 | eBay

Just search on eBay for 'power supply rectifier' and you'll find plenty, although they are a bit expensive.

Edit: If you're happy to solder it then..
http://www.ebay.co.uk/itm/63V-2200UF...item4abe9b8dad
http://www.ebay.co.uk/itm/63V-2200UF...item33673235b2

[Swarfing]

Straight lines

God knows where that came from?

[martin54]

If it were powered by a meridian twin it wouldn't have come from China would it lol,

[Ricardoco]

Hi there, try and slow things down a bit 200 steps per and velocity 200 accel 100 and see if you get different results, also what are you using to Generate your G-Code. Also have you run the driver test for mach to see if it is running as should be. Is the machine dedicated to CNC or are you running other stuff in the background..

Rick

[Carlb1058]

If it were powered by a meridian twin it wouldn't have come from China would it lol,

Good point although the Hinkleys are made in Thailand

[John S]

Still interested in that board that rectifies the current from the tranny.
I reckon they must be commercially available boards if they are in that box.

Hard bit is know what to search for on Ebay.