Setting 4 axis rotary table center of rotation

Roger Bombassei · 2008-07-17 06:32:39

I'm using Vericut 5.4 and trying to set up a 4 axis machine. I copied one of the 4 axis samples and replaced the rotory table with the one we have.
Everything seems to work except I can't figure out how to change the center of rotation from the old table to the new one.
The new table is rotating around the Workpiece Origin. But I can't figure out how to move the Workpiece Origin.
I haven't been able to find the answer looking thru the help files.
If someone can point me in the right direction, it will be greatly appreciated.
I don't have much machine setup experience. :oops:

DaveF · 2008-07-17 13:34:49

Roger

If you send me the files, I'l set it up for you.

Dave

Roger Bombassei · 2008-07-17 22:04:20

I can do that Dave but I really want to figure this out so I can make my own machines. Isn't it possible to explain how I would shift that axis?

DaveF · 2008-07-17 22:14:09

It is just easier to see if I have the files, so I can see exactly what you ared doing. Than yes, I can explain step buy step how to get from where you are, to where you want to be.

But Blind, look at a few things
turn axis of component on
than click on the tree on the component, than the model
do you have a way to measure where the COR on the new table is
is there a hole?
Do you know how to create a axis system system on a hole
that you can x-caliper from that csys

PS I talked to Cliff J today about presenting in the PACMEN webinar

Roger Bombassei · 2008-07-17 22:33:04

Thanks Dave,
I'll send the file tomorrow.
It is just one of the samples but I pasted our rotary table in the tree where the original was. The new rotary table is about 5 inches lower in Z so when I MDI a rotation, the table rotates about the old centerline.

Cliff Johnson seems like a smart guy. I hope I can catch the webinar

DaveF · 2008-07-17 22:40:06

Roger Bombassei wrote:

is about 5 inches lower in Z

Is there a feature to measure the C.O.R.?
It needs to be exact, right?

PS rename zip file to txt so my spaminator will allow
info + file summery + copy will copy all needed files

Dave

Roger Bombassei · 2008-07-18 01:05:28

Eventually it will be exact. Right now I'm just trying to make it fuction properly. The sample I'm using isn't even the correct machine.

I sent the files to you. Thanks so much for your time Dave. Vericut is so important. And important to be thurough and accurate.

It amazes me how many people send programs to the machine without doing a proper machine sim.

zac · 2008-07-18 13:20:29

[PS I talked to Cliff J today about presenting in the PACMEN webinar]

Dave, Do we have the date ?

Roger Bombassei · 2008-07-25 05:37:27

I'm still struggling with this. Can anyone point me in the right direction?
I need to shift the rotary table center of rotation, but I can't figure out where I put the numbers to cause the center to shift.
Any help will be greatly appreciated.

danr · 2008-07-25 12:54:36

Roger,

As far as I am aware centres of rotation are based upon the COMPONENT origin of the individual axis (note the difference between the Component and the Model)

For example, open up makino_1010.Vcproject from the samples, put an A-90 in the MDI and watch what happens. Now look at the Component Tree, the A axis component has some values against it of Y-27.xxx and Z-48.xxx. Also note that the COMPONENT radio button is selected near the top of the dialog. Double click the A Component and change the Y value to say Y-50. Apply it all and now MDI an A-90, the table is rotating around its new position.

To move a machine parts position but maintain the same cetre of rotation you could reposition the MODEL rather than the COMPONENT.

This can get more complicated as changing a components position affects everything below it in the Component tree.

I know this probably doesn't answer all your questions but hopefully it gives you a clue where to look.

Roger Bombassei · 2008-07-25 13:09:07

Thanks for the reply danr. That thought went thru my mind a few times, but I was hoping there was an easier way.
Actually, in my tree right now, A axis is the last thing right now. If I move the components of the A axis, (if I'm thinking right), I would have to shift everything above it in the tree. I guess :?
This machine building is mind boggling. I'll keep hacking at it. Thanks for the motivation. I'm going to make this work.
Have a great weekend.

DaveF · 2008-07-25 13:46:14

Roger,

Make the position of A 32.65 0 117.42

RT click on A, append a new component called A-Model-Offset
Make that -32.65 0 -117.42

Drag and Drop the 2 stl files of Rotary and Rotary table, to the new component.

there are other ways to do it, but if you activate the axis, and click onthe components on the tree like I showed you, you will see what is happening,

This will put A Center of rotation on the A base hub
The Origin of A-base is not at the Center of rotation, so it is a little confusing.

I will e-mail you my updated machine so you Can see.

Roger Bombassei · 2008-07-25 14:57:23

Thanks Dave. I will give it a try on Monday.
That sounds so obvious and simple. Very cool.

Ur so smart I'm envious. :mrgreen:

I'll let you know how it turns out.

I'm done for the weekend. yipeeeee

Roger Bombassei · 2008-07-28 11:16:15

It works!

I'm sooo happy.

DaveF · 2008-07-28 13:53:29

Good

Now, the best practice, is to have the Components read 0,0,0, or in the case of Z's or rotaries, reflect their position from machine Zero.

Use the Axis arrows, study each component origin, and try to build a kenematicly correct machine. THEN, place the models, and move them around, at the model level.

Your Rotary is a little unque, because the center of rotation is.........

Take a look at the Vericut Machine samples, and see where the component Origins are. Think about why the number are what they are, as they were build expertly. Is that a word?

Have fun.

PS

I got on site training from CGTech's best, on best practices of machine building. It is an ongoing process, as I still have a lot to learn, to be as good as CGTech's best. I still have a few days left in my PO for training. They do all Vericut all the time. It's just a hobby for me.

VERICUT Users' Forum

#1 2008-07-17 06:32:39

Setting 4 axis rotary table center of rotation

#2 2008-07-17 13:34:49

Re: Setting 4 axis rotary table center of rotation

#3 2008-07-17 22:04:20

Re: Setting 4 axis rotary table center of rotation

#4 2008-07-17 22:14:09

Re: Setting 4 axis rotary table center of rotation

#5 2008-07-17 22:33:04

Re: Setting 4 axis rotary table center of rotation

#6 2008-07-17 22:40:06

Re: Setting 4 axis rotary table center of rotation

#7 2008-07-18 01:05:28

Re: Setting 4 axis rotary table center of rotation

#8 2008-07-18 13:20:29

Re: Setting 4 axis rotary table center of rotation

#9 2008-07-25 05:37:27

Re: Setting 4 axis rotary table center of rotation

#10 2008-07-25 12:54:36

Re: Setting 4 axis rotary table center of rotation

#11 2008-07-25 13:09:07

Re: Setting 4 axis rotary table center of rotation

#12 2008-07-25 13:46:14

Re: Setting 4 axis rotary table center of rotation

#13 2008-07-25 14:57:23

Re: Setting 4 axis rotary table center of rotation

#14 2008-07-28 11:16:15

Re: Setting 4 axis rotary table center of rotation

#15 2008-07-28 13:53:29

Re: Setting 4 axis rotary table center of rotation

Board footer