4th Axis Positioning Question

[C. Gilson]

I'm fairly new to this forum, I did a search on my question, I didn't find the exact topic, but forgive me if it has alread been discussed.

 

I'm doing a simple program where I'm milling on the top, front, bottom and back side. I got the program done and the backplot looks fine. I post it out for our Siemens control and what should be a 90 deg. rotate post out to a 270 deg. I post the exact program to our Fanuc control and the rotates are correct.

 

The Fanuc post has this line of code in it:

rot_ccw_pos : 1 #Axis signed dir, 0 = CW positive, 1 = CCW positive.

 

Do I need to add something like this into the Siemnens post or is there another way to change this. Thanks for any help.

[Mcam Nut]

you may have to change your rotation direction in the control def.

[Mcam Nut]

sry, its in machine def

[Paul Decelles]

Changing the direction in the MD is not going to have an effect unless you are using a new X post that reads those parameters.

 

You may want to let your reseller have a look at your post if it doesn't have the rot_ccw_pos initialization. I am guessing that this is an older post that is not based off of MPFAN (which a lot of the 4-axis posts including MPMaster are based off of). They should be able to make whatever modifications are required for you.

[C. Gilson]

Thanks Shawn and Paul for your quick response, I did try changing the cw and ccw in the MD, but it had no effect on the post. I got a email into our reseller.

 

Thanks Again

[Q Havest]

you can try change variable under Toolpath MISC it might work

[Guest]

sorry, reread

[d00d]

If you are using the preset back and bottom Cplanes they may be backwards. I'm ot sure of X (still using 9) you have to actually create your bottom and back views to keep X from swapping ends so to speak.