[Seventeen]

Hi every body.

I build 3x Picstep v4 from fromorbit and one 4 Axis PC interface from pminmo :cheers:

I have a big problem !!!
The motor don't work (vibration), i use stepper motor (astrosyn 2.6v 2A/phase)
My alimentation for the card (3x picstep + 1x 4axis interface) is a 25v 12A.

I don't have 5v for the pic !, but if i run a cnc program, the stepper motor Vibrate !

I thinks the problem is the "brake", but i'm not sure !

Have you a information ? Anybody has you he already made this assembly (picstep and 4 axis interface) ?

Thnaks for your help

Merci pour votre aide ! :banana:

ps: for the resoator i use murata's CSTLS_20

[pminmo]

You can provide 5v to your pics via pin 9 on each of the interface connectors. Have you read this?
http://www.pminmo.com/picstep.htm

Phil

[Seventeen]

hi,

I don't look that !

But whatdo you mean here ?:

2. Using the 4 axis interface, there needs to be jumpers added to power the Pic on the Picstep. (where ??)

3. On the opto isolated interface board, you will need a seperate isolated 5VDC source to power the opto isolator output and the PIC. (???? i don't understand)

Thanks

[Garfield2]

You can provide 5v to your pics via pin 9 on each of the interface connectors. Have you read this?
http://www.pminmo.com/picstep.htm

Phil

It's spelt ALAN! Not Allan, Alyan, Allen, Alen, Ahlan, Ahlen, or Phalan (silent Ph)!

:wee:

Plus the 10 pin IDC isn't backwards, it's orientation on the board is reversed. Pin 1 on the opto still goes to Pin 1 the PICStep. :P

Reversing the connector could be fatal (pin 9 -> pin 1) and kill both the opto and the PIC.

Cheers,
Alan!

[Seventeen]

well,

1- 5v to pin 14 of the pic16f ==> OK
2- 5v to pin 14 of the lmd's ==> OK
3-Information in pin 11 & 10 of the lmd's ==> OK

But, the motor run only 15 secondes in ON position ! After it's don't work !

I remove in the picstep 10k R5,R6 (only in one board) ......... no change !

Have you another tips ?


merci

[Seventeen]

5V to the pin 1 (enable (brake)) is Necessities ?

:tired:

[ynneb]

It's spelt ALAN! Not Allan, Alyan, Allen, Alen, Ahlan, Ahlen, or Phalan (silent Ph)!

Hmm, Prozac anyone ?

[pminmo]

Alan is fixed......... My bad.

Pin 1 (enable) for each axis on the 4 axis board needs to be jumpered or connected to the db25, depending on software and how you want to use it.

Phil

[Seventeen]

ok i see,

but you haven't other solution for me ?

I don't understand, it's run only 20 secondes, after, no action !

What is my problem ???? picstep ?, Interface ?, please help me

[Garfield2]

ok i see,

but you haven't other solution for me ?

I don't understand, it's run only 20 secondes, after, no action !

What is my problem ???? picstep ?, Interface ?, please help me

How did you program the PIC's? Are you using the 20MHz or the internal 4MHz osciallator?

You also might be overloading the LMD's and they are thermal shutting down after 20 seconds (they're very smart little devices and can handle a fair amount of abuse). Do you have adequate heatsinking? What voltage does your power supply spit out? What current limiting resistors do you have the LMD's set to? What sized motor are you driving? Are any coils shorted?

Cheers,
Alan.

[Garfield2]

Alan is fixed......... My bad.

Thanks! It's my only real pet hate!

I never knew there where so many ways to spell my name..


Cheers,
Alan.

[Garfield2]

Hmm, Prozac anyone ?

Indeed, it's funny it's just one of those things that REALLY annoys me.

No annoyance at or on Pminmo's part, just before I read/answered this thread I had answered about 10 PICStep emails all spelling my name wrong. It was the last straw on the camels back.

Cheers,
Alan.

[Seventeen]

How did you program the PIC's? Are you using the 20MHz or the internal 4MHz osciallator?

You also might be overloading the LMD's and they are thermal shutting down after 20 seconds (they're very smart little devices and can handle a fair amount of abuse). Do you have adequate heatsinking? What voltage does your power supply spit out? What current limiting resistors do you have the LMD's set to? What sized motor are you driving? Are any coils shorted?

Cheers,
Alan.

Thanks for your reply Alan !

Thermal shutting ==> i'm not sure because, he's don't hot, and i 've a adequate heatsinking)

My power supply is a 33v in 12A

I've use 10KOhms for limitation (R2 & R4)

I drive a stepper motor Astrosyn ref: 23lm-c355-27 (2.6v - 2A)

I've tension in my LMD's and if i run my program, i can see varation of tension in the pin 8.7.6.4 in the LMD (control).

But i've no variation in pin 1.15 !!!

It's crazy , i desoldering r5.r6 resistors, but no variation !!!

my pic is OK (programm and alimentation).
my LMD's is OK (alimentation, and control)

It's very very very bizarre that 3 cards have the same problem !!!

Please help me

[Garfield2]

Thanks for your reply Alan !

Thermal shutting ==> i'm not sure because, he's don't hot, and i 've a adequate heatsinking)

My power supply is a 33v in 12A

I've use 10KOhms for limitation (R2 & R4)

I drive a stepper motor Astrosyn ref: 23lm-c355-27 (2.6v - 2A)

I've tension in my LMD's and if i run my program, i can see varation of tension in the pin 8.7.6.4 in the LMD (control).

But i've no variation in pin 1.15 !!!

It's crazy , i desoldering r5.r6 resistors, but no variation !!!

my pic is OK (programm and alimentation).
my LMD's is OK (alimentation, and control)

It's very very very bizarre that 3 cards have the same problem !!!

Please help me

Make sure the brake line is grounded. If you are seeing signal changes on the control lines to each of the LMD's (4,6,7,8) and you can see changes on pin 11 on the LMD's then the PIC is working correctly and you have a supply problem or you're R1,R3,C1,C3 are incorrect values and the chopper circuit isn't oscillating. Or you're R2 and R4 value are incorrect.

You have to make sure the BRAKE line is shorted to ground else nothing will happen at all.

Alan,

[Seventeen]

Ok Alan thanks for your reply !

Well, if i understand: Pin 1 of my connector ==> in the ground (after c12 for exemple)

It's right ?

Thank you very much