G82 Dwell Time Explained – Haas Automation Tip of the Day

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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[GXYZ]

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.

[chriscovarrubias]

I can’t believe I just watched this, I always have trouble calculating dwelling time and revolutions. Thank you

[adskFusion]

Great tip! Thanks for covering this subject in such great detail!

[spnrx]

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.

[MakeItWithCalvin]

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!

[SadamSkywalker]

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!

[Jspackman]

Great info and thoroughly covered as usual! Thanks!

[ApitFinsyah]

love this channel, very helpful, thanks a lot!

[nyccnc]

Great video! Well done. Except the eyeball. That was creepy ;)

[Kizmox]

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.

[stephendevore]

Thank you !! Like the rest of the comments I have been dwelling way to long. Another one to add to my note book.

[vikaspatil]

Great video and very easy to understand

[immanuelnadar]

great video Sir, u explain very well sir thank you so much

[spek]

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?

[ryuveliji]

We added a dwell between P300 and P150 wich worked good for most off our Tools✌

[ipadize]

thanks, i added it to the calculations in fusion 360, now every time a dwell is commanded, the dwell is automatically calculated

[rvo]

Isn't there a way to program the revolutions a tool should dwell instead of the time?

[victorhernandez]

Great info. I always used 1 second dwell at 5, 000 rpm. Man thats like 75 times it rubs lol

[abhimenasinakai]

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.

[oscarortiz]

Question, what is the formula for the thread; thanks for your help