Probe...DP4-D is beyond dead is the KP-3 the current replacement?

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Sportbikeryder
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Probe...DP4-D is beyond dead is the KP-3 the current replacement?

Post by Sportbikeryder »

I have an older Centroid built 5 axis E320 originally setup for porting. The original probe, with DSP, was a DP-4D (Perhaps the first versions of the dsp?).

After the Internal DSP sensor failed, I changed it to a standard kinematic setup and used it for awhile, then crashed it and made a pseudo repair. The repair worked well until the last crash (bumped the sensor body on a part). Now it is just a pile of pieces :?

I bought a cheapo probe to get by for rough stock setups, and it is surprisingly accurate. That said, I don't think I want to use it for probing surfaces or for anything that needs to be accurate as in bore alignment, etc.

I see the KP-3 now has an "Oak / All in 1" option. Is this inclusive of the signal inverter preferred by the older equipment?
I currently have a toolsetter and probe on the same input and have to swap polarity in the parameters to switch between the two.

I'm not sure if the DSP probes are still available or quite frankly if they are needed on a 13 year old machine.

Thanks,
John
martyscncgarage
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Re: Probe...DP4-D is beyond dead is the KP-3 the current replacement?

Post by martyscncgarage »

The KP-3 for Oak and All in One, I believe has the flipper circuit in it to show the control a normally open signal.

Marty
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cnckeith
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Re: Probe...DP4-D is beyond dead is the KP-3 the current replacement?

Post by cnckeith »

yes, the KP-3 is a great plug and play replacement for the DP-4

https://www.centroidcnc.com/centroid_di ... probe.html

select which type of system you have.
kp3_oak.PNG
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Sportbikeryder
Posts: 177
Joined: Thu Jan 26, 2017 11:45 pm
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Location: North Carolina

Re: Probe...DP4-D is beyond dead is the KP-3 the current replacement?

Post by Sportbikeryder »

Keith,
Is there an option for changing the unit to NO and closed when tripped? The original logic of Centroid was to have all probes configured that way.

If not, perhaps I can rewire the toolsetter and change the input pin in the parameters and keep the toolsetter NO, and the probe NC.

Has the DSP technology been abandoned all together by Centroid? If so, is the new Kp3 suitable for "longer" probes used for digitizing? I believe that was the selling point of the original DSP units back in the day, perhaps now it is a wash.

John
cncsnw
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Re: Probe...DP4-D is beyond dead is the KP-3 the current replacement?

Post by cncsnw »

If I understand correctly, when you order a KP-3 for use with closed-loop controls (MPU11, Allin1DC, Oak etc.) then it comes with a "flipper" circuit in the back of the black 8-position plug. This makes it behave as a normally-open probe, compatible with the DP-4.

Also if I understand correctly, the DP-7 is the successor to the DP-4D. Like the DP-4D, the DP-7 can detect contact with negligible pre-travel, and is therefore more suitable for use with long extensions; but also like the DP-4D, it is more expensive and more easily damaged.

If you have been getting acceptable precision using a cheap third-party probe, then you will almost certainly get acceptable precision from a KP-3.
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