Advice please

[m_c]

23 teeth and 32mm dia mate

1.25MOD is 32.69mm OD.
24DP is 1.09" (27.68mm), and 20DP is 1.308" (33.22mm), and 22DP does not appear to be a common size.

So assuming 1.25MOD and me reading the correct number from the chart, gives a pitch of 3.926mm per tooth, or 90.289mm for one rotation of the gear.

Or to assume 20DP, it would be 91.7194mm per rotation.

Are you sure it's a 23 tooth gear?
As even working backwards from 96.16mm, it doesn't fall on any common tooth size.
That's assuming I'm not making a complete hash of the calculations.

Off course, easier option would be just to measure the distance over as many teeth as possible and calculate the tooth pitch that way.

[D-man]

1.25MOD is 32.69mm OD.
24DP is 1.09" (27.68mm), and 20DP is 1.308" (33.22mm), and 22DP does not appear to be a common size.

So assuming 1.25MOD and me reading the correct number from the chart, gives a pitch of 3.926mm per tooth, or 90.289mm for one rotation of the gear.

Or to assume 20DP, it would be 91.7194mm per rotation.

Are you sure it's a 23 tooth gear?
As even working backwards from 96.16mm, it doesn't fall on any common tooth size.
That's assuming I'm not making a complete hash of the calculations.

Off course, easier option would be just to measure the distance over as many teeth as possible and calculate the tooth pitch that way.

I'm fairly certain they are the right numbers, I will check again in the morning mate and come back to you.


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[D-man]

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)

[D-man]

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

[m_c]

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?

[D-man]

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 turn


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[m_c]

With the same 100 step/mm setting, try a move of 16mm and see how far the motor itself turns.

[D-man]

With the same 100 step/mm setting, try a move of 16mm and see how far the motor itself turns.

I'm getting multiple turns from 16mm! Lol it still hasn't stopped yet


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[D-man]

With the same 100 step/mm setting, try a move of 16mm and see how far the motor itself turns.

Ok I'm getting 1 revolution on the small pinion attached to motor. @ 16mm movement with 100spr


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[Greeny]

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?