The illusive Boxford 260vmc

[Ricardoco]

Ok fitted BOB today, all axis move in one direction only!!! but sound rough and move very slowly so a bit of sherlock is required (par for the course, how much is simple nowadays)....


Rick

[GeorgeD]

Check for voltage at Dir +&- also pulse? on BOB inputs

[Ricardoco]

Check for voltage at Dir +&- also pulse? on BOB inputs

Well it is an opto isolated board with LED's on all outputs so i know it is getting pulse direction info but im on case!!!

[Ricardoco]

LOL how stupid can one get....derrrrr forgot to connect GND on BOB. All Axis now work both step and direction!!! im off to play for a while and tune the motors :)

[Ricardoco]

Ok im going mad,, will someone take a look at these two items and tell me how they interface and how they connect to the bob please ive tried for two hours and when it gets to that my experience tell me im doing something wrong...

there are only three connections to the lenze 534 to the speed interface and although it only shows 1 connection to the breakout board there is also an rtn connection.....:confused:

Lenze534 vfd


pins 7,8,9 are for the speed control using a 10klin pot or circuit below

cncdoctor speed controler

[irving2008]

Ok im going mad,, will someone take a look at these two items and tell me how they interface and how they connect to the bob please ive tried for two hours and when it gets to that my experience tell me im doing something wrong...

there are only three connections to the lenze 534 to the speed interface and although it only shows 1 connection to the breakout board there is also an rtn connection.....:confused:

Lenze534 vfd


cncdoctor speed controler

0-10v on speedcontroller TB2 to pin 8 on Lenze
0v on speed controller TB2 to pin 7 on Lenze
+ve on speed controller TB2 not connected


STEP on speedcontroller TB1 to BOB Output (typically pin 8)
RTN on speedcontroller TB1 to BOB Ground associated with the chosen output

Do NOT share the grounds... they may not be the same ground level...

[Ricardoco]

Thanks irving, did you know what the rtn connection on the speed control to bob is..

[irving2008]

RTN = return

[Ricardoco]

RTN = return

lol ok so is it supposed to be conected anywhere? ive connected the step to pin 8 on the bob is that the only connection to the speed control board...(i suppose i asked for that lol)

[irving2008]

see my post above... connected to BOB ground alongside pin 8