Need help understanding Axis configuration

[Sowest48]

I have my machine running in both the X and Y direction but I need some help in better understanding axis configuration.

I am using DM542T Stepperonline drivers and BUILDYOURCNC motors P/N SM60HT86-2008BF-U2. I chose the Stepperonline CL/57Y/CL86Y as the axis drive type even though it has a different part number. The steps/revin the Wizard was set to 4000 but since I don’t have that rate on my drivers (3200 was as close as I see) I changed it to 3200 steps/rev. to match the drivers. Both the X and Y axis move but not surprising the amount of travel shown on the DROs is far less than the actual travel of the axis. I’m using a belt drive on the X axis with a 2nd motor slaved to the 1st and the pulley diameter on both is 0.86” which should give me about 2.7”/rev.

What settings do I have to change to get the DROs to read the correct distance. I looked through the manual and searched the forum but couldn’t find anything relating to my question.

I hope someone can help.
Tim

[cnckeith]

set steps per rev to equal the drive setting. so if drive is 3200 put in 3200 for steps per rev.

now its all up to the "overall turns ratio" to calibrate the axis movement. this is explained in the Acorn install manual and many videos.

overall turns ratio is a physical constant. how many rotations of the axis motor will yield 1" of travel? . that is the number you want to put in to calibrate the axis. you can find this number by various methods, math or measurement which are explained in the manual and the videos.

before you figure the overall turns ratio test that the steps per rev is set and working properly.. this is an easy test... set the overall turns ratio = 1

then in MDI mode command 1": of movement ....G1x1F20 and observe the motor did it rotate 1 revolution exactly? if so.. you are good and now go set the overall turns ratio to match the physical properties of the machine. example for instance a 5 turns per inch ballscrew belted 1:1 with the axis motor = 5 turns per inch. so put in 5 for the overall turns ratio for that axis. then go command G1x10F20 (10 inch move) and measure the movement.

https://www.centroidcnc.com/centroid_di ... manual.pdf

https://centroidcncforum.com/viewtopic.php?f=63&t=1801

https://centroidcncforum.com/viewtopic.php?p=8852#p8852

[Sowest48]

Thanks for the help.
All is running ok and will move on with the build.

Tim