Torchmate accumove 2 conversion

[Digger873]

So I have been doing a lot of reading and searching on this latest subject. I double checked the number of thread starts (8) and the distance traveled in one turn on the lead screw as seen here in these pictures the marker line on the screw follows one thread for a full rev and measures 1 inch

and here.

I have gone back over every setting but in order to get the proper travel I have to set my rev per inch at 3.1 something. This just doesn't make sense as my lead screws are definitely 1 turn per revolution, and are direct drive. I am just worried this will come back to bite me in but down the road somewhere. From everything I have read only the rev per in setting controls this and it is off by 3. even Marty's convertor says it should be 1:1.
What am I missing.
Thanks

copy of my report

report_54453803CBBB-0104247819_2024-04-16_14-32-49.zip

(5.51 MiB) Not downloaded yet

[tblough]

You need at least 3 motor revs per inch of travel for correct positioning, so you need add a belt drive between your motor and screw, or replace your screws with a smaller pitch.

Just setting the revs/inch to 3 will not work

[Digger873]

Yeah, I intend to replace the lead screws in the future, but I think you misunderstood me.
My lead screws are physically 1 rev per inch. When setting up the drive configuration in acorn, if I enter 1 rev per inch and tell it to move
12 inches it moves around 4 inches. So in order to get it to move 12 inches like its supposed to I have to set the revs per inch in acorn to 3.18 so when the dro says it moved 12 inches it actually moves 12 inches. I havent fine tuned with a dial indicator yet just used a tape measure. Seeing as how a cnc is based in math, I have to ask where else is the math off if I continue forward with it this way?
According to everything I can find on this subject, the only adjustment for this in acorn is in revs per inch. The motor only turns one third of what it should when the revs per inch setting in acorn matches the physical screw. This cannot be correct.
The only thing I can think of is its somewhere between acorn and the motors.
The motors are Primopal 1.8 6 amp steppers hooked to stepper online DM860T drivers. They are a 4 wire stepper motor with a max of 200 khz. I contacted stepperonline with the motor model and asked what driver to use because they are 6 amp motors, so I am confident I have the correct driver. I am no expert, but Im pretty sure they are wired correctly, and seem to be working perfectly at 350 ipm.
What I am asking is is there any other thing that could be causing the motors to only turn a third of what they are supposed to? Is it possible that the resolution settings could be causing this. Everything I have been able to find says no.
I have not been able to find anything online like this so I am hoping someone smarter than has seen this or similar in the past.
Thanks for the help
Jared

[tblough]

What do you have your motor steps set to on the drives? In the Wizard?

[Digger873]

4000

[Joey]

Digger.

Looking at the Photo album.

I see the Drives do not have a 4000 step setting.

It Appears they are set as OFF OFF ON ON which is 3200 Steps.

These are your current drives in the Pictures correct?

[Joey]

Hard to tell from the picture but I had the dip switches confused.

I was looking at 7-10 in that last picture.

After closer inspection 5-8 look to be 5=ON 6=OFF 7=ON 8=ON

This would mean the drives are set to 1600 steps.

This makes more sense the 1600 steps is closer to 1/3 of 4000.
To move the correct amount you would have to multiple the overall turns ration from 1 by 3 roughly. Which you did

I would set the Drives to 6400. 5=ON 6=ON 7=OFF 8=ON

Set the Wizard to Match

[Digger873]

Ok here is a better picture and a picture of the manual for my drive

I think this is right
5=on
6=off
7=on
8=off
In checking this I did notice I left the 9 and 10 the way they came.
The default though was a 24v input and I switched the dip switch on the side to 5v input based on what ShawnM said. I wonder if the #9 dip switch has anything to do with that. Its funny there is nothing in the manual about 9 and 10. Does that look right.
Jared
You are right a higher resolution will be better with a 1 to 1, I have just got hung up on this and 4000 seemed like a good place to start.

[Digger873]

Oh there it is in the manual.
It says switch 9 is (PUL/DIR) or (CW/CCW) it just doesnt say which way is which
I am going to change the resolution to 6400 and see if that makes a difference.
Ill be back.
Thanks Jared

[Joey]

Alright so it looks like 5=OFF 6=ON 7=OFF 8=ON

So that is 12800 steps per rev right?