please dont rip this site

Linistepper Equatorial Stepper Drive

Roman has written an alternative firmware package for the Linistepper V1 or V2 to drive an equatorial mount at a precise and accurate rate. (Please note, this is NOT compatible with the 16F1826 used in the V3 kit. You can use the 16F628A as supplied here in the V3 PCB, with the external resonator we supply here) ceefna's excellent home built star mount for astro photography is the first using this new code. The code not only drives the motor but also generates a very accurate stream of step pulses which turns the motor (and so the camera) at just the right speed to cancel out the motion of the earth, allowing very long exposures which increase the sensitivity of the film and the brightness of the stars. Check out his excellent video:

ceefna has written a spread sheet that will help in calculating the correct values to enter into the program to adjust it for your mount gear ratio, which has been adapted to this web page here. To use the form, just enter your gear ratio and press enter. For example, if your gear ratio is 4672:1, enter 4672 and press enter.

SIDERAL SECONDS

GEAR RATIO

MICROSTEPS

STEP TIMING

86164.1 ÷ :1 ÷ = seconds

The 2 dipswitches supplied with the Linistepper Kit are not used, and probably shouldn't be installed. The 2x5 header which normally carries step, direction and enable signals to the driver is used to select options, and can be connected to switches or just jumpered to the desired setting:

PORTA.F0 = INPUT_RUN run; (0v=run, 5v=stop) //normally the "STEP" input, on pin 5 of the header.

PORTA.F1 = INPUT_DIR motor direction; (0v=forward, 5v=reverse) // remains the "DIRECTION" input on pin 3.

PORTA.F2 = INPUT_SPEED selects speed 1 or speed 2; (0v=speed1, 5v=speed2) // normally the "ENABLE" input on header pin 1.

To connect switches, run one side of the switch to the pin listed above, and the other side to +5 logic power.

Custom chips available! Don't have a PIC programmer? Pre-programmed PIC's are now availabe, custom set to your gear ratio (be sure to specify your SPEED1 value when ordering). Resonator for use with V3 Linistepper kit also included.

See also:


file: /Techref/io/stepper/linistep/equatorial.htm, 4KB, , updated: 2015/12/13 17:27, local time: 2024/11/5 08:21,
TOP NEW HELP FIND: 
3.135.217.85:LOG IN
©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!

 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://sxlist.com/techref/io/stepper/linistep/equatorial.htm"> Linistepper Equatorial Stepper Drive</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

 

Welcome to sxlist.com!


Site supported by
sales, advertizing,
& kind contributors
just like you!

Please don't rip/copy
(here's why

Copies of the site on CD
are available at minimal cost.
 
Quick, Easy and CHEAP! RCL-1 RS232 Level Converter in a DB9 backshell
Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .