Page 1: Table Of Contents
KP-1 CNC Touch Probe Centroid KP-1 CNC Touch Probe CNC Software version: CNC12 V.5.24+ Models: Acorn/AcornSix/Allin1DC/Oak/Hickory CNC Specifications Components Connections to Acorn KP-1 Wizard Setup Stylus Installation Testing Probe Alignment Styli Diameter Pre-travel Calculation Maintenance and Care Oak and Allin1DC setup Use with other CNC controls /documents/centroid_KP-1_cnc_touch_probe.pdf rev5...
Page 2: Specifications
KP-1 Description The KP-1 is a CNC Touch Probe intended for probing to find part zero’s, reference positions, locate bores, bases, corners etc., and digitizing which allows for the copying of surfaces and shaped objects. The user should first become familiar with the various parts and features of the probe as shown below to facilitate assembly, installation, operation and calibra- tion.
Page 3: Components
Mounting: The standard 1/2” mounting shank design allows installation in commonly available tool holders. Other mount- ing options can be created by the user and installed on the KP-1 by loosening the run-out adjustment screws and remov- ing the stock 1/2” mounting shank from the body of the probe.
Page 4 5 mm stainless steel stylus Concentricity adjustment screws. 3/32” hex Oil fill port, Deoxit 5 and/or pure mineral oil ONLY once per year. See maintenance section of this manual KP-1 Bar Code USB-C connection port Stylus tighten hole Stylus stem Stylus tip Page 4...
Page 5: Connections To Acorn
VIOLET OUTPUTS Download full size PDF’s of all Acorn schematics including this KP-1 to Acorn hookup schematic on the Centroid Hook up schematics web page. Use the search to narrow the results. “KP-1” to view all KP-1 hookup schematics. (AcornSix/Hicko- ry/Oak/Allin1DC etc) https://www.centroidcnc.com/centroid_diy/schematics/pbrowse.php...
Page 6 KP-1 Probe cable connector Connect the provided USB-C cable connector into the KP-1 body and fully seat the plug! Correct! Probe cable connector is fully seated. Strain relieve cable when in use so probe/machine movement does not pull on the cable.
Page 7: Wizard Setup
KP-1 Acorn/AcornSix/Hickory Wizard configuration 1.) Select the Probe input type from the drop down box 2.) Click and drag “ProbeDetect” and “ProbeTripped” to inputs 6 and 7 respectively Page 7...
Page 8 KP-1 Acorn/AcornSix/Hickory Wizard configuration 1.) Select the Probe menu under “Touch Devices” 2.) Choose “KP-1” in the Probe Type Drop down menu. 3.) Press Write Settings to CNC control and follow the instructions on the screen. Page 8...
Page 9: Stylus Installation
KP-1 Stylus installation See the KP-1 Unboxing video for a demonstration on how to install the stylus in the KP-1 https://youtu.be/HbOMSKYuy6g Step 1: Inspect the threads and mating surfaces of the stylus and stylus mount boss. They must be clean and free of defects.
Page 10 KP-1 Stylus installation STEP 3: Finish tightening the stylus by inserting the stylus wrench in the stylus wrench hole and slowly tighten. Snug the stylus until the probe begins to deflect and when you feel a mild but firm stop has been reached stop applying torque, the stylus is now completely tight.
Page 11: Testing
1.) Enter into the CNC12 Probing Cycle menu, F1 Setup, F1 Part, F5 Probe, pick F1 Bore probing cycle. 2.) With the KP-1 plugged in (make sure Plug is FULLY seated!), manually trigger the probe by gently touching the stylus to trigger the probe observe the Probe state indicator graphic on the screen.
Page 12 To manually test a Touch Probe using a Automatic probing cycle. 1.) With the KP-1 plugged in (make sure Plug is FULLY seated!) and in the machine tool. Turn down the Feed Rate Over- ride to 10 or 20%.
Page 13: Probe Alignment
Touch Probe Alignment Now that you know the probe works and is triggering properly along with a probing cycle we need to make sure the probe stylus tip is concentric with the spindle and then the probe will be ready to use! Probe Alignment: Center the Ball of the stylus so that it is concentric with the spindle Using an indicator and the three run out adjustment screws on the body of the probe we will adjust the concentricity of stylus ball to be concentric with the spindle.
Page 14 Touch Probe Concentricity Probe “run-out” is the amount the probe tip moves an indicator as the spindle is rotated. Run-out adjustment is necessary to ensure that the center of the probe tip is aligned with the center of the spindle rotation axis. This eliminates any unde- sired off-sets between the probe and the cutting tool centers when digitizing or doing automated part set-up.
Page 15 Touch Probe Concentricity alignment STEP 1: Install the KP-1 Probe into the dedicated 0.500” tool holder in the machine spindle. STEP 2: Position the dial indicator, as shown in the photo below, with the finger of the dial indicator on the front and center of the stylus ball.
Page 16 STEP 4: Rotate the probe so that the nearest run-out adjustment set screw is above the finger tip of the indicator. Using the 3/32” hex wrench slowly turn the setscrew directly above the indicator finger, in the counter clock-wise direction, the dial indicator will show the reduction in the run-out.
Page 17 STEP 5: Repeat steps 4 until no run-out of the tip is visible on the dial indicator needle. If a set screws become too tight before you have finished the adjustment, do not force them, instead loosen the setscrew that corresponds with the highest reading on the dial indicator, and tighten the set screw at the lowest reading.
Page 18: Styli Diameter Pre-Travel Calculation
Touch Probe “Pre-Travel” stylus diameter calibration procedure. Simply entering the value of the probe tip diameter in the tool library will not produce accurate Probing position results. Each Stylus has a “Pre-Travel” adjusted diameter. This is a diameter that has been compensated for that particular stylus pre-travel amount.
Page 19 3.) Starting with CNC12 v5.20+, CNC12 has a built in Probe Stylus Calibration routine which can be access through the Probing menu “Stylus Calibration” (and is also available through the Virtual Control Panel “UTILS” menu). Enter the ring gauge diameter, press enter Enter the stylus ball diameter, press enter Page 19...
Page 20 Verify KP-1 Touch Probe is working, positioned in the ring gauge bore and Press Cycle Start to run the automatic calibration cycle. Results are displayed when stylus calibration is completed. Page 20...
Page 21 Now run the Center of Bore Probing cycle which will measure the diameter and find the XY center position. You should see a bore measurement value result very close to the actual Bore diameter. If not, you can tweak the probe stylus pretravel calibration diameter and repeat the bore probing cycle as needed to obtain as close a measurement as possible to the actual ring gauge diameter.
Page 22: Angular Alignment
To check the angular alignment begin by sweeping in the KP-1 at the base of the stylus stem (the end away from the tip) with the dial indicator. If the run-out indicated at this point is greater than the difference between the stylus tip diameter and stem diameter then it will be possible for the stem to contact a vertical surface before the tip (also called “shanking...
Page 23: Maintenance And Care
- Do not use compressed air to clean the KP-1 as this may force contaminants into the electrical connector and inside the Probe body damaging the probe. - Do not use Compressed Air to blow off parts near the KP-1 the reflected air stream full of debris will risk damage to probe.
Page 24: Oak And Allin1Dc Setup
KP-1 cable for Oak/Allin1DC/MPU11/M400/T400/M39 based CNC controllers KP-1 Kit with twist plug cable Page 24...
Page 25 KP-1 Probe Cable for use with Oak/Allin1DC/MPU11/M400/T400/M39 based CNC controllers KP-1 CPC CABLE ASSEMBLY NUMBER 15431 6 FT PROBE CONNECTOR CONTROL CABINET CONNECTOR Plug viewed Plug viewed AMP MALE PLUG P/N 878 from top from front STRAIN RELIEF P/N 879...
Page 26 All Centroid factory built CNC controllers have a Probe Cable connection factory installed with the mating twist on “bulk- head” connector that is prewired to the controller and is ready to go. Just plug in any Centroid Probe and you are good to For those building their own CNC control cabinets with Oak or Allin1DC platforms the “Probe Bulkhead Cable”...
Page 27 CNC12 KP-1 configuration for Oak and Allin1DC CNC12 V4.16+ requires a Pro or Ultimate License for Probe functionality. Oak/Allin1DC control system parameters below are the recommended basic settings SAE Inch and Millimeters in (mm) These are the suggested starting values. Some of these parameters are typically adjusted by the integrator/user to suit the probing/digitizing application.
Page 28: Use With Other Cnc Controls
The KP-1 is compatible with most any CNC control with an input for a probe. The KP-1 itself is a kinematic probe which simply has continuity through the precision kinematic seat ( a super accurate switch) when tripped. The KP-1 does have a printed circuit board which processes the kinematic switch signal.
Page 29 The Probe DETECTION Circuit CLOSES the “Probe Detect” Input when Probe is plugged in. Centroid KP-1 has a simple Probe Detection Circuit built into the probe which when the probe is plugged in by the opera- tor lets CNC12 know that a probe is active and in use. This detection input tells CNC12 to start activate Probe Protection.
Page 30 Related Resources KP-1 Unboxing Video https://youtu.be/HbOMSKYuy6g KP-1 Setup Video. https://youtu.be/a6LVseKI7do Related Acorn General DIY Probe and TT setup Manual https://www.centroidcnc.com/centroid_diy/downloads/acorn_documentation/acorn_probe_setup.pdf Free CNC Tech Support sign up. https://centroidcncforum.com/viewtopic.php?f=60&t=3498 Free Tech Support sign up. Page 30...

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