Messages

61

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 08, 2008, 03:51:27 AM »

i think in a previous post you changed the breakout board to a probotix  http://www.probotix.com/schematics/pbx-2_schematic.jpg

so if that is the case then the connections are simply
1 to 1 , 2 to 2 etc all the way to 25 to 25 ,

However beware ! , due to the nature of D Type connectors in some cases the pins can change position depending
if your using male or female connectiors , so the best way is to check is with the cable connected to the break out board , and check from the pc end of the cable to the breakout board pcb connection , the should simply be pins 1 to 1 all the way

so here we go

check pin2 first to the pcb pin 2 with a multimeter on resistance and see if you have continuity
if you do then check the following pins exactly the same way

pin4 to pcb pin 4 , pin 6 to pcb pin 6 , pin 15 to pcb pin 15 ,  pin 16 , pin 23  &  pin 24

if all are correct then your cable is correct .

if any pin is incorrect then you have 2 options
rewire one plug or

make up  whats called a gender changer between a 25w plug and a 25w socket ( or plug to plug )  , which can then be inserted between the printer cable and the breakout board 

now this gender changer needs to be made to suit
the connections they become swapped from end to end on each row

so pin 1 has to go to pin 13
pin2 to pin 12
pin 3 to pin 11
continue for all pins on the top row

then the same for the bottom row

pin 14 to pin 25
pin 15 to pin 24
pin 16 to pin 23
pin 17 to pin 22
you can miss a few pins now and jump to
pin 24 to pin 15
pin 25 to pin 13

etc etc
















 

62

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 08, 2008, 03:11:43 AM »

ok with your circuit diagram their ARE MAJOR problems wrong with it


firstly the + &  - 24v  should be connected across all motor drives ( KL 4030 ) in parralell , i.e red to red , black to black
so at your fuse block ( transformer side )  connect all reds together and all blacks together , and also a red and black to your 12v supply pcb ( if you notice you have the black wires correct  but the red's are not all connected together )

check that you then have 24v on each of the correct connections on the KL4030'S and that your 12v supply output  is correct with your multimeter

the step & direction  connections look fine ,


do NOT CONNECT TO THE COMPUTER YET
we need to check out your printer lead and the connections , so which breakout board are you using ?
so i can be more specific


 


 


 

63

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 07, 2008, 05:25:59 PM »

your making an easy job into a long term nightmare take one step at a time as jim says
make a wiring diagram ! ,

check each part seperately , power supply first because if thats wrong everything else will be
check your break out board , then check out your driver board

give us a diagram and we can have this sorted in one go
 

64

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 06, 2008, 05:12:55 PM »

Hi Travis
yes wiring the bob to the 7812 will be fine

try firing it up without the pc connected first , if you want to check out the drives
by momentary connecting the step pin to the 0v rail , you should hear and see the approprate motor take a step
then by repeated touching you should see it rotate ,

dont worry over which way the motor goes at this stage , if all is well with all 3 motors then go ahead and connect the pc
but not untill

Dave
 

65

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 06, 2008, 02:51:09 PM »

be careful with opto isolation boards , a lot of the newer pc's dont like them , especialy laptops
due mostly to the newer 3v logic on the parallel ports

your experience may vary of course

Dave

66

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 06, 2008, 03:14:49 AM »

one other point at the probotix interface already has a regulator ,
so this could be used to power the logic side ( i.e the 5v ) of the
KL4030 ( CP PIN ) , so connect pins 7 of each bob axis to the approprate CP pin on the KL4030

then supply a dc voltage to the bob  of between 6.5 and 12v ( because a regulator requires a voltage approx 1.5 > 2v greater than it's output , but most regulators can handle 12v fine , it only means the regulator runs hotter and may require a heatsink )
also as the regulator on the bob is actualy a LM317 it can handle higher voltages in most cases , as the current used is small .

be carefull of your common ( black ) wiring , they should all be connected together on the dc side and not the ac side of the
veroboard ( unclear from the pics ) it appears that you are supplying unregulated ac to the bob this should be a dc voltage
greater than 6.5v ,

can you clarify your veroboard layout

but other than that your layout looks fine as i said

Dave

Dave

67

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 06, 2008, 02:44:59 AM »

picture  looks fine Travis

Dave 

68

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 05, 2008, 05:15:39 PM »

should be fine as it is

Dave 

69

General Mach Discussion / Re: Fried 2nd Computer (Newbie)

« on: June 05, 2008, 03:10:02 PM »

it looks like you may have found the problem
also take a look here it may help you further ,

http://www.kelinginc.net/KL-4030Wiring.pdf
http://www.kelinginc.net/KL23H286-20-08B.pdf

i have also private mailed you
give you a chance to check things out further , let me know we should be able to test it all out with out connecting the pc so you wont fry another !

Dave

70

General Mach Discussion / Re: Retrofit CNC Mill

« on: June 05, 2008, 07:11:39 AM »

if it's already got encoders etc , then just drive the analogs from a new controller
see my other posts , darn cheaper too

Dave