Hi bobc :
I got one RAMPS-FD from www.geeetech.com ,and also I get a copy of schematic from github ,when I try to testing repetier-frimware and finished some code-moding ,I found that geeetch.com use V1 issueA schematic which has lots of changes from issueB ,So would you pls send me a copy of issue A schematic? THX a lot!
And I have finished testing them0~3 ,all endstop . Now I has some problem on testing D8 D9 .Repetier-frimware define turn off as Arduino due D8 io at low level ,but the output turn on ,and that should be turn off , when Arduino due D8 io at high level the output turned off , I have check the IC 74HC244d, IO level is currect , mosfet is working good ,so I am foucs on the Q...(forgot the num) which is work as an swtich to controll MOSFET turn on/off .....
so I am checking what happened on earth now ....
I got one RAMPS-FD from www.geeetech.com ,and also I get a copy of schematic from github ,when I try to testing repetier-frimware and finished some code-moding ,I found that geeetch.com use V1 issueA schematic which has lots of changes from issueB ,So would you pls send me a copy of issue A schematic? THX a lot!
And I have finished testing them0~3 ,all endstop . Now I has some problem on testing D8 D9 .Repetier-frimware define turn off as Arduino due D8 io at low level ,but the output turn on ,and that should be turn off , when Arduino due D8 io at high level the output turned off , I have check the IC 74HC244d, IO level is currect , mosfet is working good ,so I am foucs on the Q...(forgot the num) which is work as an swtich to controll MOSFET turn on/off .....
so I am checking what happened on earth now ....