How to tell the control that any angular rotation is deg/min

Kantha · 2006-04-12 15:51:33

Hi,
Can some body tell me how to tell the control if it involves rotation the feed rate is deg/min otherwise it is inch/min? I am trying to make the control to understand this so that the run time would be accurate.

Regards
Kantha

prayasam · 2006-04-13 21:07:58

Which control are you using? I know Siemens have few functions.

Kantha · 2006-04-14 10:48:41

The control is Fanuc16M.

DaveF · 2006-04-14 13:50:58

G93 call FeedModeTime macro
G94 call FeedModeMinuite macro

your post should probably go into Inverse Time mode, when it detects rotary motion.

Is it a rotary head, table or both?

Kantha · 2006-04-14 14:47:45

We have that way in all other machines except few machines as we did not buy the G93 option in these controls. The post is not set to go inverse as we do not have that option in the control.

This machine has got table.

Kantha.

DaveF · 2006-04-14 15:23:48

I'm stumped
:?

I see no feed rev per min
here is all the feed macros.

sorry

try calling support. It's either easy, or tricky.

dave

FeedInvTime?Sets the feedrate based on the input value (InverseTime). The Feedrate will be calculated based on the formula: Feedrate = Distance * InverseTime.

FeedInvTimeMultiplier?Specifies a multiplier that is to be applied to the value specified with the FeedInvTime macro. (Default=1.0)

FeedInvTimeSec?Similar to FeedInvTime, except that the units are in 1/seconds rather then 1/minutes.

FeedModeMinute?Sets the feed mode to Feed per Minute.

FeedModeRevolution?Sets the feed mode to Feed per Revolution.

FeedModeTime?Sets the feed mode to Inverse Time. The Feedrate will be calculated based on the formula: Feedrate = Distance * InverseTime.

FeedPerMinute?Sets the feedrate based on the input value. The units will be either IPM or MMPM.

NOTE: This macro should typically be called during as a ?Start of Processing? Event macro.

FeedPerMinuteType?5 axis motions often have special calculations for feed. This macro allows the user to select which calculation type to use (specified with an override value). This calculation type will only be used when interpolating (non-rapid mode), and the feed mode is set to units per minute. Type 0 is the default. This value is modal.

0: Treat the feedrate as a real units per minute feedrate. The actual distance being travelled will be used for the time calculation.

1: This calculation treats all rotary tables as if they are linear, and calculates the time for the motion accordingly. For example: on the block G91 X100 A90 F50, the time to execute the block would be sqrt((100*100) + (90*90))/50. Stated another way:

If only linear axis moves, treat the feedrate as inches/mm per minute

If only a single rotary moves, tread the feedrate as degrees per minute

If linear and rotary axis moves, or if multiple rotaries move, treat all axis as if they were linear.

2: The interpretation of the feedrate will be dependent on the type of motion on the block

If only linear axis moves, treat the feedrate as inches/mm per minute.

If only rotaries axis move, treat the feedrate as degrees per minute. The rotary moving the longest distance will determine the time for the block.

If both rotary and linear axis move, ignore the rotary motion in the time calculation. The rotary axes will then move at a proportional rate so that they finish the motion at the same time as the linear axes.

3: A new FeedPerMinuteType (3) for this version of the 840D control.

If only linear motions exist, treat the feedrate as a normal inches/mm per minute.

If rotary's exist, treat the feedrate as degrees per minute, and ignore any linear motion on the block as far as feedrate and time calculations.

Calculations are based on the largest rotary delta.

FeedPerRev?Sets the feedrate based on the input value. The units will be either IPR or MMPR.

FeedRate?Sets the feedrate based on the input value. It will use the previously set feedrate mode to output the corresponding units.

Al_V · 2006-04-14 15:42:11

the answer is in the above text:

If only a single rotary moves, tread the feedrate as degrees per minute

vhubbard · 2006-04-17 15:30:10

Vericut should be giving an accurate time when G94 is used and a linear and rotary or rotary only motion is used if the Machine axis are defined correctly. We worked with CGTech a few revs ago to get this accurate.

G94 related moves:

Make sure your post is calculating the feed values accurately. The control does not adjust rotary feed based on XYor Z position, the post must do this. The post must account for the intended radius/distance from rotation center to get the correct tool tip feed calculation. The feeds will change on almost every rotary related move and can range in value dramatically while maintaining the programmed "tool tip" feed value.

Simple Example when 10IPM tool tip programmed feed is desired.
G94
X0Y0Z0B0
Z10.F10. (1minute)
B10. F10 is 1 minute, but not cutting 10ipm. A tool tip move of 10 degrees over a 10 inch radius (Z10.), is approx 6.3 arc inches. Actual tool tip cut feed would be 6.3 ipm To get 10 ipm, the feed would have to be set to F15.9 for this move.

We think in Inch, MM and degrees/min, the control does not, it only sees scale unit distances and applies the feed/distance according to a simple units-per-axis method. The formula for calculating "distance" per move on a typical horizontal with a rotary table is SQRT(Xdelta*Xdelta +Ydelta*Ydelta+Zdelta*Zdelta+Bdelta*Bdelta)

vhubbard · 2006-04-17 15:34:48

Oops, I fumble fingered the Arc distance calculation in my example, but I think you should be able to get the idea. (It only moves aobut 1.75 inches, not 6.3 at tool tip )

Kantha · 2006-04-20 12:11:28

Thank you very much for all the suggestions. I added the macro FeedPerMinuteType to F register and did overriding with a value of 3. I am not seeing any difference in run time. Do I have to use any other macro along with this or am I doing something wrong.

Thanks & Regards
Kantha.

Al_V · 2006-04-20 12:32:18

Kantha,
I think you should use override value of 1.

vhubbard · 2006-04-20 14:04:21

I have
MACRO "FeedPerMinuteType" {
OVERRIDE_VALUE 1
}

Set in the events.

Kantha · 2006-04-20 14:08:20

Thanks for your input.

Eventhough my program would move rotary alone, I went and checked the control and figured out that the control runs in the following way.

1. If it is linear and G94 (there is no G93 in this control), it is inches per minute.
2. If it is rotary alone and G94, it is degrees per minute.
3. If it involves rotary and linear, it is degrees per minute.

That is why I have put 3 in the overirde value. I did save the control, but I am not seeing any difference in the run time. May be I am missing some macros somewhere or doing something wrong.

Thanks & Regards
Kantha.

Al_V · 2006-04-20 14:51:51

In vericut I would try MDI G1 G94 G91 F1. B360.
at 1 degree per min this should take 360 minutes right?

It works on my control, but you have to add the feedperminutetype value=? to the start of processing event.

>Setup >Control >Adv. Options >Events >Start of processing event

Kantha · 2006-04-20 15:16:16

That worked. Thanks to both of you. Both of you figured out what mistake I was doing.

I was adding in the register F. I did not know that I had to add in the events. Can you please enlighten me how do you know that you have to add it there instead of registers? (When you do add the macro in the events and when do you add in the registers. (It is unfortunate to tell you that I do not know this after taking 5 day class on vericut some time in 2004.)

Thanks & Regards
Kantha.

VERICUT Users' Forum

#1 2006-04-12 15:51:33

How to tell the control that any angular rotation is deg/min

#2 2006-04-13 21:07:58

Re: How to tell the control that any angular rotation is deg/min

#3 2006-04-14 10:48:41

Re: How to tell the control that any angular rotation is deg/min

#4 2006-04-14 13:50:58

Re: How to tell the control that any angular rotation is deg/min

#5 2006-04-14 14:47:45

Re: How to tell the control that any angular rotation is deg/min

#6 2006-04-14 15:23:48

Re: How to tell the control that any angular rotation is deg/min

#7 2006-04-14 15:42:11

Re: How to tell the control that any angular rotation is deg/min

#8 2006-04-17 15:30:10

Re: How to tell the control that any angular rotation is deg/min

#9 2006-04-17 15:34:48

Re: How to tell the control that any angular rotation is deg/min

#10 2006-04-20 12:11:28

Re: How to tell the control that any angular rotation is deg/min

#11 2006-04-20 12:32:18

Re: How to tell the control that any angular rotation is deg/min

#12 2006-04-20 14:04:21

Re: How to tell the control that any angular rotation is deg/min

#13 2006-04-20 14:08:20

Re: How to tell the control that any angular rotation is deg/min

#14 2006-04-20 14:51:51

Re: How to tell the control that any angular rotation is deg/min

#15 2006-04-20 15:16:16

Re: How to tell the control that any angular rotation is deg/min

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