[doctorV]

I finally made a linistepper, and it mounts PIC 16F628A now, but stepper motor doesn't move:
- when it's stopped, its shaft is locked
- when it should run, the shaft vibrates.
I tried to swap motor wires, but nothing changed, so I acquired some data by an oscilloscope. I burned LinistepperV2.hex on the microchip. The stepper motor is a NMB (minebea electronics) PM35S-048_HPL2 from an HP printer, an the software is KCAM . The beheaviour of linistepper is the same with PIC 16F628-04/P. I tested linistepper with PICs programmed and empty: the result is the same.
Last three pictures are signals from the interface board (PMinMO 5 axis).
What is the problem of my linistepper?
PS: The pic programmer I used is uJDM (microJDM).

The cristal oscillator works at 16MHZ

[James Newton]

The PIC isn't clocking. It either doesn't support that clock speed, isn't getting logic power and ground, is stuck in MCLR, or isn't actually programmed... or the xtal is bad...

[doctorV]

The PIC isn't clocking. It either doesn't support that clock speed, isn't getting logic power and ground, is stuck in MCLR, or isn't actually programmed... or the xtal is bad...

Maybe I found the problem: pin 9 @ 0 volt. I have some 5V power adaptor, can i use a Nokia 5VDC 890mA power adaptor or something similar to plug into breakout board and route 5 volts to linistepper?

[doctorV]

Can I have a working .hex firmware file for linistepper v2??? Where can I find it?

[James Newton]

Maybe I found the problem: pin 9 @ 0 volt. I have some 5V power adaptor, can i use a Nokia 5VDC 890mA power adaptor or something similar to plug into breakout board and route 5 volts to linistepper?

Well, it needs +5volts from somewhere! ;0) I'm not sure about that specific adapter... you typically want /regulated/ 5 volt power and most AC adapter don't regulate their output... so a "5VDC" adapter may put out anything from 5 to 10 volts. PIC's fry at 6 or 7 volts if I remember correctly.

[Drools]

Just my very tiny 2 cents, some of the 5VDC cell phone adaptors are in fact regulated. I use them all the time in the devices I make....
Now back to your regular programming.

[doctorV]

Is USB vdc output 5 V regulated?

[James Newton]

Is USB vdc output 5 V regulated?

Yes... but if you fry a port or your PC, it's not my fault, ok?

[doctorV]

Yes... but if you fry a port or your PC, it's not my fault, ok?

ok! :-) Last week end I fryed mic-in port of my laptop soundcard, because I made it work as an oscilloscope. Lesson learnt: I'll do my experiments on my 7 years old desktop PC!

[doctorV]

my PminMO 5 axis interface board has a 7805 voltage regulator. Problem solved.

[doctorV]

I built a linistepper V2 board again, but I soldered 1N4007 diodes instead of 1N4148:
-When PIC is programmed it works, when PIC isn't programmed it doesn't (Well)
-Motor just runs clockwise.
-when DIP switch is set to ON-ON, motor runs this wayne little step counterclockwise and three steps clockwise. Motor is able to do a 360 degrees revolution, untill it overheats (so I decided to apply 1.5Volt to motor).
-when DIP switch is set to On-off, off-on and off-off, motor shaft vibrates (one step clockwise and one counterclockwise, it's unable to do a 360 degrees revolution).

I checked PIC16F628A:
port|Volt | port|Volts
1 |0.00 | 18 | 1.42
2 |5.07 | 17 | 1.42
3 |5.07 | 16 | 0.98
4 |5.08 | 15 | 1.83
5 |0.00 | 14 | 5.08
6 |5.01 | 13 | 4.41
7 |0.00 | 12 | 4.90
8 |5.01 | 11 | 0.00
9 |0.00 | 10 | 0.02

I attach my 5 wire stepper motor specifications

[doctorV]

P.S. The software is KCAM

[doctorV]

Engine runs only clockwise just on X axis (interface board has some problems), but problems on steps still persist!

[James Newton]

The wiring of the stepper motor to the driver needs to be changed. The order of the coils is wrong.

[doctorV]

The wiring of the stepper motor to the driver needs to be changed. The order of the coils is wrong.

I fixed X axis problem, it was just due to a bad soldering. X axis spin both clockwise and counterclockwise now. When I'll came back home, I'll let you know about the wiring. I'd like to know what's the difference between 1N4007 and 1N4148 diodes. My board works since I soldered 1n4007. Why?

[James Newton]

Answers.com - Comparison between 1n4007 and 1n4148 diode

[Sam Waters]

For anyone who was looking at my previous posts.

This is the completed boards that I'm currently building, will have pix soon.

The older posts had some errors so please use this one.

Includes PCB's, Schematics, Eagle files, parts lists, etc..

[doctorV]

I finally made my linistepper working: the problems were:
- bad wiring
- wrong time constant in Kcam.
Thanks to everyone! You are great! :-D

[James Newton]

I finally made my linistepper working: the problems were:
- bad wiring
- wrong time constant in Kcam.
Thanks to everyone! You are great! :-D

Congrats! What time constant did you end up using? In fact, would you be willing to post your Kcam configuration so I can document it for others?

[doctorV]

Congrats! What time constant did you end up using? In fact, would you be willing to post your Kcam configuration so I can document it for others?

I'm going to post my configuration soon :-)