Dynomotion

Group: DynoMotion Message: 9336 From: principledad Date: 3/21/2014
Subject: Possibly losing steps
I have a small cnc router with a kflop controller.  The origin point appears to be drifting from part to part. X is moving in the -X direction. Same with Y and Z is going up. I am cutting aluminum and polycarbonate. Both much harder than wood.

I plan to run a program 10 times tonight in the air (no workpiece) with a dial indicator on the X axis just to see what happens. Then I plan to do the same with a workpiece.  This should tell me if the problem is the result of losing steps.

Assuming I am losing steps, one possible solution is to add some sort of feedback to the system. 
Two questions:

1. Can this be accomplished with the kflop controller?
2. If so, what feedback systems do you recommend?

PS This is one of Carl Bruce's machines.
Group: DynoMotion Message: 9337 From: Tom Kerekes Date: 3/21/2014
Subject: Re: Possibly losing steps
Hi Paul,

What kind of Stepper Drives do you have?

What Are your Settings for Step Pulse Timing?

The feedback would be an encoder.  You can connect single ended encoders to KFLOP.

Regards
TK


Group: DynoMotion Message: 9339 From: principledad Date: 3/21/2014
Subject: Re: Possibly losing steps
Tom,
Thanks for your reply.  I am working through this with Carl Bruce, he provides great customer service.
If I need more info, I will get back with you.

Paul