Telescope drive motors that don't...

[skimask]

WTF is going on with you Trent?

---Insert that cool little spinning 6 pack GIF here...of darn good beer...keep it near...to your ear...and don't fall...on your rear...by a deer...ok I'm done---

[Dodgy Geezer]

Well, I'm about to give up on this circuit - it's hard to see any future in it. Instead, I've just ordered one of these JaF Microstep modules. http://www.jafmotion.co.uk/motordrives.htm .

Let's see if it does what it say on the tin....

[falingtrea]

Trent, looks to me like mister-e provides a link on his website to a US distributer of PBP. I don't think he sells it himself.

[mister_e]

i had a link yesterday on my signature... just to calm down Mr Jackson's PMS i've removed it.

[malc-c]

OK - did I miss something here.. How the hell did this topic get from discussing telescope drives to discussing the merrits of death row ???

I gather the original poster gave up in the end and purchased a commercial driver. Maybe because the topic went way off topic, maybe as purchasing a ready made alternative to developing his own was the easy option?

[Acetronics2]

did I miss something here.. ?

Hi, Malc

I Think yes ...

To me, Our Friend Trent smokes too much illegals ...

like in the 60's when writers ( Françoise Sagan i.e. ) were smoking mushrooms to try to get some inspiration ...

but do not worry ... He doesn't bite ...

Or , may be , he tried himself a new electronic version of his Electric Chair ( see previous posts )...

Hope he won't try a new "Trentorized" version of the machine used in the film " FLY" ( w . Jeff Goldblum )

...

Alain

[T.Jackson]

but do not worry ... He doesn't bite ...

And that's exactly why I'd never make it as a copper. My nerves are absolutely shocking and I haven't got the stomach for it. My heart goes out to anyone in law enforcement that goes around chasing these guys, I know it would be absolute hell

[Dodgy Geezer]

"...OK - did I miss something here.. How the hell did this topic get from discussing telescope drives to discussing the merrits of death row ???

I gather the original poster gave up in the end and purchased a commercial driver. Maybe because the topic went way off topic, maybe as purchasing a ready made alternative to developing his own was the easy option...."


No, I'm actually just waiting here for the off-topic discussion to die down. I went and purchased a commercial microstepping chip to use instead of the L293D, but I still expect to drive it using a PIC. In fact, I have some more problems now, because I thought PIC assembler was fairly simple, and it turns out not to be!

I am confused by the memory allocation of variables. As far as I can see, a PIC .ASM file comprises a set of memory declarations followed by some commands. Variables are defined by naming them and giving their locations, thus:

VAR1 EQU H'10' ;defines the location H10 as VAR1
VAR2 EQU H'22' ;defines the location H22 as VAR2

and then you can load them:

MOVLW D'5'
MOVWF VAR1 ;puts 5 in VAR1 (location H10)
.
.
MOVLW VAR1 ;puts 5 back in the W Register

and generally play with them. But when I try to alter the program I have, it complains that some of the variables I create are in 'Restricted Memory'. I can't find any way to work out what is legal memory and what isn't. I have tried putting variable in random places until the error goes away, and then I hit the next problem, which seems to be that other processes also write to the memory locations I am using, so every so often my counts jump up by 20 or so. There are several simple tutorials on the web for blinking LEDs, but none seem to cover this sort of problem...

[mister_e]

Welcome back

Which chip you're using right now? For each PIC, there's some dedicated places for the GPR. Look your datasheet under Data Memory Map, and see where you can sit your General Purpose Registers.