dudz
31-12-2014, 11:21 AM
I have a 3 axis CNC USB bob 200khz like this one :
http://www.ebay.co.uk/itm/251747739480?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch% 2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D25174 7739480%26_rdc%3D1
There are also available this card :
http://www.ebay.co.uk/itm/261163689018?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch% 2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D26116 3689018%26_rdc%3D1
As far as I can see, the only difference between the two boards, is on the 3 axis board there are two Optocouplers missed out for the 4th axis. I have emailed several companies supplying this board and they say they are completely different designs. I doubt that. I have ordered two Optocouplers of the same as the others to see if I can control a 4th axis. There are outputs on the end of the board for the 4th axis if you look. The IC's cost me a grand total of 3 Euros
http://www.ebay.co.uk/itm/251747739480?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch% 2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D25174 7739480%26_rdc%3D1
There are also available this card :
http://www.ebay.co.uk/itm/261163689018?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch% 2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D26116 3689018%26_rdc%3D1
As far as I can see, the only difference between the two boards, is on the 3 axis board there are two Optocouplers missed out for the 4th axis. I have emailed several companies supplying this board and they say they are completely different designs. I doubt that. I have ordered two Optocouplers of the same as the others to see if I can control a 4th axis. There are outputs on the end of the board for the 4th axis if you look. The IC's cost me a grand total of 3 Euros