CNC Rotary table/lathe head indexing

[Nipper]

Hi,
I am new to MYCNCUK so you will have to patient with me I am not an Electronics person but I have worked on very large commercial CNC machines I have a small lathe and a small Knee Mill and I am going to attempt to convert them both to CNC First question is could I use this control to index a six position tool post for the lathe. Second question do you sell this control already made Regards nipper

[irving2008]

Nipper,

Welcome. I'm sure Steve will be along sometime to answer this but my 2p (or should that be 2c) worth for Q1 is that, yes it could, but its overkill since you don't need the complexity of a fully variable positioning, you need a 'rotate to position x'. The hardware would be similar but it would need different software. If I was doing it i would put some positive position indication, or even tool type indication as feed back (replacing the keypad effectively) so that you can have 'position to parting tool', 'position to facing tool' type commands irrespective of where the tool was in the toolpost.

As to Q2, I know Steve has said he doesn't do these pre-built in the past, but I'm sure there are people in your part of the world who could help you there...

[Kwackers]

Hi Nipper,

It's pretty much as irving2008 says. You could use the divider but it's overkill for a toolpost, also it raises the question of how do you make the whole thing 'stiff' enough to work properly? If it's for a fully automated system then you need a method for locking it down and if not then I think you'd be better with a manual indexing toolpost.

Regards
Steve.

[irving2008]

I think auto-toolchangers have a locking plunger with a solenoid or stepper driven retractor to lock the post and a switch to indicate the plunger is clear so that the software wont turn the post until it unlocked. A switch to show the locked position would also be useful.

[cncguy]

hi guys

i tried running the hex code on proteus and the processor is been reset every 23secs by watchdog timer. itried compilling the v1.1 still the same problem. can someone tell me what i am missing

[Kwackers]

hi guys

i tried running the hex code on proteus and the processor is been reset every 23secs by watchdog timer. itried compilling the v1.1 still the same problem. can someone tell me what i am missing

The watch dog timer isn't used in the firmware - so if you're enabling it then that's why it's resetting!

[rasta]

Hi,
I am new to MYCNCUK so you will have to patient with me I am not an Electronics person but I have worked on very large commercial CNC machines I have a small lathe and a small Knee Mill and I am going to attempt to convert them both to CNC First question is could I use this control to index a six position tool post for the lathe. Second question do you sell this control already made Regards nipper

Hi Nipper;
there is someone in OZ that has done a tool changer for a herbert lathe, I think that is
in SA , he is a nice fellow , have a look at this

http://www.cncathome.com/latheturret.html
also there is a very nice fellow in Melbourne ,his name is Frank Tkalcevic, he is
very active in the emc forums .
regards from Sydney
mariano
mariano