G82 Dwell Time Explained - Haas Automation Tip of the Day
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- In this Tip of the Day, Mark explains how and why to use a dwell time in your G82 drilling cycles, and provides a simple formula to calculate the correct length of that dwell for best results.
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Using a dwell is not only to leave a true surface such as for a valve seat, it helps insure a consistent and accurate depth. It can also prevent the edge of a delicate tool from chipping as it is pulled out rapidly when there is still a heavy chip(s) attached to the work piece.
Great tip! Thanks for covering this subject in such great detail!
Does Fusion cam offer this?
Great video! Well done. Except the eyeball. That was creepy ;)
I can’t believe I just watched this, I always have trouble calculating dwelling time and revolutions. Thank you
Back in the primative days of Brown & Sharpe automatics the recommended dwell was 3-5 revolutions. The cams were designed to dwell the tool and you had to calculate the dwell (in hundreths of a circle, not degrees... it's a long story) based upon the spindle revolutions of all the other cutting operations (which were based on spindle speed, feedrate and the length of each cut totalled together and diveded by the non-cutting operations).
CNC is *too* easy!😊 I program a lathe to use a G4 x.1 (one tenth second) for dwells. It looks like I need to cut some of them down by your formula.
Thanks for the tip and formula.
The machines are gone now, but the guys used to adjust the Conomatics with a hammer. You need .001" deeper? That's a medium tap with the brass hammer. Need .010"? Get the mini-sledge.
Hmmm, maybe that's why the wore out? :-p
I recently sold 2 of the last 3 Brownies and I don't regret going cnc. The last #00g will be used to make parts that can be made in 6 seconds or less, 10k or more at a time.
Sometimes the "romance" people have with the past colors the reality of the past. We can't, or shouldn't go back.
Could you program this calculation for the P-value in the G82 line incorporating the system variable for the currently programmed spindle speed so the number of revolutions remains the same if the spindle speed is edited? For example: P[1.5*60,000]/#4119. Or, in this format:
#101=1.5 (NUMBER OF REVOLUTIONS TO DWELL)
#102=60,000 (CONVERSION FACTOR FOR MILLISECONDS)
#103=#101*#102
#104=#4119 (CURRENTLY PROGRAMMED SPINDLE SPEED)
P[#103/#104] (DWELL TIME IN MILLISECONDS IN THE G82 LINE), e.g.: N1000 G82 Z-1.2000 R.1000 P[#103/#104] F10.0 M8
thanks, i added it to the calculations in fusion 360, now every time a dwell is commanded, the dwell is automatically calculated
NICE, that's a great idea.
for anyone who is wondering what it looks like:
2*60/tool_spindleSpeed (60 instead of 60.000 because Linuxcnc likes Seconds, not milliseconds)
What's the difference between a G4 and G82? Thanks you!
G82 is a spot drill canned cycle so you can do multiple locations. G4 is a dwell code which has to be input for every specific location.
I'd rather not dwell on the subject
Great info. I always used 1 second dwell at 5,000 rpm. Man thats like 75 times it rubs lol
Same, because Heidenhain ask it seconds.
@@kaljakeissi Heidenhain allows to input decimal values, so you get milliseconds easily.
83.34
@@nathanbowden325 83.343224*
Thank you !! Like the rest of the comments I have been dwelling way to long. Another one to add to my note book.
i usually dwell by p100 regardless of the spindle speed, i probably should reduce it sometimes
Great info as always Mark. You had touched on the subject of excessive purge time after using through coolant on the UMC. But I noticed you have pretty much no purge on you'res. Goes straight into a tool change. Any suggestions?
Question, what is the formula for the thread; thanks for your help
This is interesting feature, we had quite a bit of trouble with boring heads leaving uneven bottom shoulder finish. This will fix it perfectly and actually speed up the cycle time since we "fixed" it by feeding slowly.
Never thought about having the tool running a REALLY fast dwell making that big a difference in hole quality, especially on spotted holes and form tools but it is the little things like that which really show in a final product, especially when precise accuracy is required!
Excelent tip, tanks!
We added a dwell between P300 and P150 wich worked good for most off our Tools✌
Interesting. I was aware of the concept, but never bothered to do the math. I just went with .2s (regardles of rpm), because that seemed about right. Now, equipped with a formula, I will adapt my dwell times. Thank you!
does this have relation to flute number?
thanks you
sir please make a video on how to write canned cycle program for vmc machine. it will help me a lot to improve my programming skills.
Isn't there a way to program the revolutions a tool should dwell instead of the time?
Great info and thoroughly covered as usual! Thanks!
Awesome info. Thanks!
great video Sir, u explain very well sir thank you so much
Another way to figure out dwell value for one full revolution. 108,000 ÷ by rpm = dwell value. So 108,000 ÷ 6,112 = 17.67 for p value witch = dwell value using G82 (P18) you need to round value because you don't use a decimal point for p value. Brian's tip of the day.
Great work
love this channel, very helpful, thanks a lot!
1:57How You My Friend ...? .. Do you tell me the name of this carbide cutting
Looks like an SAE port cutter.
@@ZeroFoxGiven_ thank you very much
Good video i found it very helpful
Great video and very easy to understand
Mark-the best!
Hii
Tells me about from where this dwell rev. Comes
Ignore grammatical errors plzz
1.5 kaise liye
great .. now I am smarter than before i watched this video :)
Dear sir
We have a technical issue in our plant regarding taper on OD BOSS TURNING USING MICRO BORING BAR ON KITAMURA VMC M/C.
TURNING LENGTH IS 16mm
Finish OD -18.022+/-0.006
I/P OD- 18.32
RPM 3600 FEED 30/50
WE HAVE CHECKED FOR AXIS ALIGNMENT/SPINDLE RUNOUT
ALL ARE OK TO THEIR VALID LIMIT......
Pavan Kawatikawar How about reducing spindle speed?
Sir u r best.
Спасибо Вам за объяснение видео.👍👍👍
Excellent tutorial thanks for sharing
Lo tomare en cuenta para el futuro...
looks like that side lock holder is running out of true
Why not make it so you can specify the number of revolutions directly? I mean for the next generation of controllers.
Jim's videos probably going to implement this in our customer's post processors now.
Because somethings dwell without revolutions, therefore time is needed
@@thundercuck1779 I tried to think of tools that don't rotate but would still need dwell but couldn't think of any! A probe doesn't rotate but also doesn't need dwell right? Can you give examples?
@@UshouldTryReality The machine although is used for cnc applications which involve spinning cutters, you can hold arms, grippers, brush tools,certain actuator tools. I have to admit it's niche but there are many outside of just milling.
I use G4X2.0 on the MORI S
i just use G83 with no Q and a P or X instead
Dwell revs = 60s/RPM?
Sir is this works in fanuc control
Kool! Oi! CAT
Great video
thank you!
Can you tell me the name of this tool??
Tomasz - This is a Port Contour Cutter. I think this one was from Widia Metcut. I’ll also use the AccuPort Port Contour tools from Allied Machine and Engineering. - Mark, Haas Tip-of-the-day.
G4 S1
👍
2000 is what
Spindle rpm
Great tip.
Thank you Mark.
You're a great teacher.
GOD† bless you
Great