Hey All,
Well, I have been using my Sherline CNC for over a year now..
I did do some changes to the machine, fixing here and there..
I did put new leadscrews (x and y axis) on the machine about 6 months ago.
I just noticed something..
It is not cutting exact..
I cut some holes for some bolts and low and behold the bolts holes were a tad to small..
The bolts would not fit into the hole.
I measured the hole and it was not to my measurements (the size of the bolt) I used in Vectric's Aspire software.
Now the question..
Is there a template or a way I can see if my machine is machining correctly?
I realize I could cut some squares or circles and measure them with my Vernier digital caliper.
But is there a better way?
A certain template or cutting template, one uses?
Ok, let's say I did measure, and my square, I cut was off?
How do I compensate for the off-ness?
I realize I have to go to my machine setup and adjust the STEPS PER INCH.
But is there a formula, you use?
Or do you just add or subtract a little amount from the steps per inch and just keep playing with it,
until the square I cut is to my measurement?
I hope I made some sense here.
I am using DeskCNC for my post processor.
What about the Z axis, how do you measure that?
Also, whatever I change on the Y axis, do I do the same with the X axis?
I did use the formula that came with my controller (Imservice) and Globe motors. (steppers?)
My leadscrews are 4 tpi. (.250 lead) dual start threads, my X and Y.
My Z stayed the same as I did not change my Z leadscrew. (10 pitch)
I did determine the Max velocity (speed) of my machine.
I thought I followed the directions here:
http://www.imsrv.com/deskcnc/setup/index.html
Also, do you guys check your machines often?
Or once it is set, you are good to go?
Sorry about all the babble..
But I am just trying to figure this out..
Thanks
Grease