Wrong way to think about it.
You need steps per mm.
So if it takes 8000steps to move one pinion rotation of 96.16mm, then you divide the 8000 by 96.12, which gives 83.19467554 steps per mm.
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I did try it that way but didn't want to mention in fear of looking daft, as I calculated it as it was written [emoji23]
Cheers for the help lads much appreciated.
Attached a few pics just in case I've missed or got something wrong [emoji15]
https://uploads.tapatalk-cdn.com/201...a50f66706e.jpg
https://uploads.tapatalk-cdn.com/201...e8dc6f609d.jpg
https://uploads.tapatalk-cdn.com/201...84fb05f3b4.jpg
https://uploads.tapatalk-cdn.com/201...bb246ca3f5.jpg
https://uploads.tapatalk-cdn.com/201...dc3818c44a.jpg
https://uploads.tapatalk-cdn.com/201...823e8f23f9.jpg
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Nah wrong got it wrong.
You now have distance pinion travels for one rev which is 96.16 but you have 5:1 ratio so this drops to 19.232 for one rev of the motor which is the affective pitch. So now simply divide 1600 by pitch to get the steps per mm ie: 1600/19.232 = 83.194 steps per mm
Doh didn't see MC done it.!
Defiantly a 23 tooth pinion
32.82 Dia Pinion (digital Gauges so may change each time lol i will also try a normal set in case these are off.)
93mm Travel now lol (Hard to get to the pinion to mark it, but i would rather go with this measurement)
OK so now im confused. i punched these numbers into software, however, when I want to move 50mm (In MDI) im getting something like 267mm when marking the gantry and measuring
OK, go back to basics.
Set the steps/mm to 100, mark the big pulley/pinion, and command a move of 80mm (8000 steps).
Does the pulley/pinion move one complete revolution?
Ok that was just over quarter of a turnhttps://uploads.tapatalk-cdn.com/201...7bbfb64290.jpg
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With the same 100 step/mm setting, try a move of 16mm and see how far the motor itself turns.
Just thinking of possibilities:
Are you sure it only rotated 1/4 turn? Not 1 1/4 or 2 1/4 etc,
as you previous test seems to indicate too much rotation not too little i.e moves 267mm instead of 50mm.
Also are you sure the leadshine driver pictured (1600 steps/rev) is the one driving that motor?
Could one of the others be driving it and have different microstepping settings?