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Author Topic: Abnormality (Exact stop vs constant velocity)  (Read 6516 times)

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vmax549

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Re: Abnormality (Exact stop vs constant velocity)
« Reply #10 on: July 22, 2007, 12:09:51 PM »
BigWig, if the tapping head does a self reverse without having to stop and reverse the spindle then it has a clutch. Just a thought.
I tried to download the Manual on the spd5 but it was not available for download.
(;-) TP
Re: Abnormality (Exact stop vs constant velocity)
« Reply #11 on: July 23, 2007, 05:59:31 AM »
Hi TP
As far as I can tell there is no clutch with this model.

Certainly not the type that has spring loaded torque settings

on the top. When I work out how to attach a file I will post

a copy of the manual

Cheers George

Offline Chaoticone

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Re: Abnormality (Exact stop vs constant velocity)
« Reply #12 on: July 23, 2007, 07:19:38 AM »
George,
    G61 is exact stop mode and G64 is CV mode. Either of these will over-ride settings you have changed. Do you see any G61s in your code? Can you post the G-code for us to see?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: Abnormality (Exact stop vs constant velocity)
« Reply #13 on: July 23, 2007, 11:46:59 AM »
HI TP

Hopefully the SPD5 tapping manual is attached.

let me know what you think

Hi Brett

programe is at work so will post tomorrow

many thanks both for your help

Cheers George
Re: Abnormality (Exact stop vs constant velocity)
« Reply #14 on: July 23, 2007, 03:44:23 PM »
Hi Brett

Rather than waiting to tomorrow I decided to recreate the programe.

(a dummy prog of 4 holes drilled then tapped)

Don't worry about the speeds and feeds for tapping i am just going off

memory. The original were worked out using the formulae in the

tapping brochure. The operator instructions for the unit says the

tapping head must not be run in ramp or exact stop mode and at the

moment it is.

Many thanks for looking

Cheers George

vmax549

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Re: Abnormality (Exact stop vs constant velocity)
« Reply #15 on: July 24, 2007, 05:01:57 PM »
George the unit does have a clutch, just not the type you are thinking of. This unit has a very close clouple clutch arrangment that shifts from forward to reverse. It is "suppose" to run from a reamer cycle which is straight feed in and then out. But if you look at the 1st page top rh side under thru holes. It says to avoid excessive wear on the unit it is best to have a fast initial retract to reverse the unit for retraction. Those are the KEY words.

Also do you have a spindle RPM indicator to verify the actual spindle speed. The speed and feed have to be correct for the unit to operate correctly. If you plan to do a lot of tapping I would suggest you install an encoder to aloow you to see the true RPM. Also with the RPM dro workin you can USE feed per rev settings instead of inch per min. It makes the tapping programming very simple.

(;-) TP
Re: Abnormality (Exact stop vs constant velocity)
« Reply #16 on: July 25, 2007, 06:54:29 AM »
Hi TP

As far a I am aware there is a spindle encoder fitted.

On the mach screen I can see programmed rpm

then underneath the slightly flucuating actual rpm.

Now do I use this to good effect?

Cheers George