Guru
Joined: 22/02/2006
Location: AustraliaPosts: 2149
| Posted: 07:44am 16 May 2026 |
OK Pete grab your vernier or just a 6" rule and measure the amount of threads in 1" this will give you the TPI of the leadscrew and if the count doesn't come out right it's metric leadscrew so measure from one tooth to the next which will give you the metric pitch.
Mate I'm an old school heavy machinist where I used to think the bigger machine was the best as when the old guy's died out I would be still in tune but sadly the heavy machining died in this country along with the old guy's.
Now as you have a 1:2 gear ratio driving the leadscrew it's double the pulses for one rotation so what is the DM556 settings as I did find when I tested the Y axis on my surface grinder it did hammer so by raising the current on the first 3 switch's where 2.7 amps with switch 4 off did reduce the holding current from a amp to 300mA and got the stepper working nice.
You have that Ching controller that just needs the right info now with setting the DM556 up to give the stepper current needed should solve your problem.
Whereas with my surface grinder project just over the I2C hurdle has wasted another day
Regards Bryan
Edited 2026-05-16 17:46 by Bryan1