DDSCV1.1 3 and 4 axis offline motion controller

[BenOZ]

Hi all,
Im new here and have recently made a CNC machine using this controller, which i must admit isn't too bad a unit apart from the manual! I'm not a pro by any means and i do this just for a fun hobby. There is a couple of issues i'm working on at the moment and i'm just making sure i'm not one of them!! A question i have though, is how do you program a zero button for this unit? That is, push an external button and all axis' are zeroed?

[AndyGuid]

Welcome to the forum Ben from a wannabe CNC-er lurking out in the Pakenham neck of the woods.
Roughly whereabouts in Melbourne are you?
Andy

[Boyan Silyavski]

Hello!

I just stumbled over this thread and decided to register an account here.

To introduce myself, I am Benedikt from MadModder / bmuessig.eu.

iocapa and I are working hard on a complete open-source GPL rewrite of the entire software which will take time.
Right now, we are still very flexible. If you have any special feature requests, now is the best time to ask!
In principle many things could still be added and more types of machines could be supported.

Feel free to ask.

Best regards,
Benedikt

Hi Benedikt,
Please update us with how things are going when you make some progress.

The main feature if possible for the router type machines will be to auto square the gantry. Which implies that A should be able to be linear like Y, the 2 long axis on router. For the moment i have connected 2 drives at the Y and works without a glitch, so that scenario is proven.

Next thing probing on X and Y , similar like Z probing, would be interesting.

For that money i dont expect much more, if one wants rigid tapping and similar, he must look at the 500-1500 controllers. I am quite happy with the price and what it is.

Hi all,
Im new here and have recently made a CNC machine using this controller, which i must admit isn't too bad a unit apart from the manual! I'm not a pro by any means and i do this just for a fun hobby. There is a couple of issues i'm working on at the moment and i'm just making sure i'm not one of them!! A question i have though, is how do you program a zero button for this unit? That is, push an external button and all axis' are zeroed?

Thats how i have it. Push a button and all zeroes/ the DRO/. Not that the machine starts a zeroing procedure.

[Lee Roberts]

In the controller, in the last part of the machine parameter you can fond the "interpolation period", set it up at 0,005 and try it, change even the "screen refresh" at not less than 4000, otherwise the screen will slow the cpu, as it not equipped with a graphic card.(you don't need to watch the screen, watch the machine).

Find even the "operating acceleration" parameter and set it up at 500mm is the diagonal interpolated acceleration try it and find a reasonable one for your machine.
Is just a bit of thing to try, maybe it won't help you, but it worth try.....

If you have servos, they are coming with resolver on the back, so your motors know exactly where and when they are at all time.
So, even with strong acceleration they shouldn't loose position... Here the problem: is your Router ridgid enough? Because with long traveling and strong accelerations the structure has the time to stabilize in between the movment, with very short traveling the machine is going into a factor called "structural resonance" and "inverted motion", what that mean? It mean that the axis is called to travel in a direction, but due to acceleration and mass involved the underneath structure is going in the opposite direction, and in a very small piece this factor is noticeable, even more when you are carving aluminium rather than wood, thats why the milling machines are heavy, especially CNC centers. Another thing to check is the connections between the motors and the ballscrews.... check all the mechanic parts first, as per very small pieces and high acceleration you are going to join another world with a high inversion rate, is called "jerk"
A router is a router, and as much as you like it, is shaking and flexible under high torque.....
I would suggest you to lower the acceleration to 300/500mm Min and look if the problem is persistent before retuning all the motors and blame them or the controller.

Regards

Merlin, any updates on the firmware?