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VMC Tapping
- Thread starter Fiaz
- Start date
- Replies 14
- Views 2,412
G
guest
Guest
We'll get right on that. 
Booze Daily
Titanium
- Joined
- Sep 18, 2015
- Location
- Ohio
RPM x pitch
Machinist John
Plastic
- Joined
- Jul 14, 2017
- Location
- Clark County WA, USA
Check in your Machinist's handbook. Also try Google and doing a search here in this valuable forum!
Speed for various materials is listed as SFM.
The calculations are RPM= SFM*3.82 / diameter
Feed is dependent on the pitch (Threads per inch)
http://dealer.vega-tool.com/pdf/P48-50.pdf
The calculations are RPM= SFM*3.82 / diameter
Feed is dependent on the pitch (Threads per inch)
http://dealer.vega-tool.com/pdf/P48-50.pdf
AARONT
Stainless
- Joined
- Feb 19, 2013
- Location
- Madison, WI
It's sketchy at best if you don't have a tap rev limiter with a tap transducer.
You should probably buy a pneumatic tapping arm.
You should probably buy a pneumatic tapping arm.
Haha, that's mean. He could be working on a Speedio, we have no idea-obviously.
OP, speed changes with material, feed is the Pitch in whatever way you would like to translate that.
It helps also if when you post a question you come at it without demanding it from us. Try asking with the please word.
R
Vancbiker
Diamond
- Joined
- Jan 5, 2014
- Location
- Vancouver, WA. USA
G95 is not supported on many machining centers. Particularly older ones.
If G95 is not supported, it can artificially be made effective by setting parameter 1402#0 (NPC) to 1.
The specified feed would be internally converted to feed per minute based on the specified rpm and the feed per revolution. This, of course, may not be very accurate necessitating the use of floating holder. The only advantage is that instead of we doing the calculation, the machine does it. If position coder is later installed, this parameter would need to be made 0.
Maybe on the lower end machines it's not supported, but I've been using it for tapping on my Okumas and my Hyundai-Wia vmc's for a long time.
Vancbiker
Diamond
- Joined
- Jan 5, 2014
- Location
- Vancouver, WA. USA
Okuma has had G95 as a standard feature at least as far back as the mid 80s when I first started working on them. It worked on both interpolated (feed) movements as well as tapping cycles. In that era, they were the first and only machining center with that ability without purchasing an optional spindle encoder that I had ever seen. By the mid 90s many control builders had rigid tapping dialed and some allowed (or required) pitch designation for the feed command. Few of those controls would allow G95 to function outside of a tapping cycle though unless an optional spindle encoder was fitted.
I'm interested about your Hyundai-Wias. Do you, or can you, use G95 outside of tapping cycles?
sinha said:
This ability only began with the Fanuc 16 series control of the mid 90s.
AARONT
Stainless
- Joined
- Feb 19, 2013
- Location
- Madison, WI
If they can't even figure out the calculation for the feed of a tap, then I stand by the pneumatic tapping arm statement.
