King Rich KRV-2000 Knee Mill CNC Conversion

[BMSTECH]

Limit switches were also fitted by the factory in preparation for the Proto Trak system to be fitted to my mill. The micro switch modules on the X-axis and Y-axis are wired to separate DB-9 plugs ready to be connected to the controller. I have sketched the wiring connections after continuity testing the circuit. I shall incorporate these limit switches in my drive E-Stop circuit before testing the motors.
Thanks Skullworks, I can see how easily safety can be overlooked in the enthusiasm of getting things running.

[BMSTECH]

I'm back from a 7 week break and want to get these motors wired. The used AC servos came with encoder lead plugs and sockets that had been cut from the original machine. I discovered that my VGA cable idea was no good when I cut into a new cable to find only 8 conductors not twisted pairs and 3 coaxial. Belkin need to correct their specifications. I need to source new or used cable to make up new leads. The encoder cable is 5 twisted pairs of multi stranded copper, a rope core and a braided shield in a flexible PVC outer. The second picture shows a 9 pair shielded cable that was attached to the drive encoder plug which must have been for a different encoder. I have made several enquiries trying to source suitable cable with little success. I need only 2 m per lead and Suppliers want to sell a 30 m roll for hundreds of dollars. If anyone can help with new or used cable, I am keen to hear from you.

[BMSTECH]

I have ordered some cable from Farnell Australia following a reply from Stewey.

Part Num. Qty . Availability Line Price Description Mfr Part # Mfr Name
======= ==== ======== ======= ================================== ======= ========
1286036 5 Refer Web 57.20 DATA CABLE, FLEX, 5PAIR, 0.25MM, PER M; 0030922 LAPP KABEL
1286022 5 Refer Web 31.10 CABLE, HI FLEX, 4CORE, 0.75MM, PER M; R 0027547 LAPP KABEL
GST : $8.83
Total : $97.13

The 5 pair cable for the encoders and the 4 core cable for the 3 phase Power.
Nice that they sell some cable by the metre.

Thanks Stewey for the info.

[Stewey]

Happy to help!
(actually I think it's Belkin cable too...)

[BMSTECH]

Figuring out how to mount the Servo Drives in the existing Enclosure on the rear of the machine today. Drilled and tapped some holes in the rear plate using co-ordinates and hand winding the mill table back and forth to get an accurate layout.

[Deano7/11]

looking good there mate.

will be very keen to see how you go with this conversion.

i have an Ostmac (king rich Kr-v2000) that i would love to convert one day.

can i ask what sort of $$$ this mill set you back in 'prototrak ready' form?

[Deano7/11]

this is my new old mill

[BMSTECH]

My new KR-V2000 mill supplied with the factory fitted extras that enable a Proto Trak CNC system to be fitted, cost me $AU 10,860 ex. gst + delivery.
The rear mounted Drive/Contoller Enclosure was also included in the "Proto Trak Ready" package.

[Deano7/11]

that seems pretty good value really.

more than likely you will set up with a new cnc mill for under 15k

not bad value at all

[Deano7/11]

how are you planing to cnc the z axis? quill or knee?

[BMSTECH]

I will focus on the X and Y axis first. There is a lot that can be done with just that working properly. Proto Trak sell just a 2 axis system as a basic CNC conversion and their 3 axis system controls the Quill. I have posted a photo of a Proto Trak Quill Conversion here:
http://www.cnczone.com/forums/attach...3&d=1274575780

The Quill on these machines must be rigid enough for a Quill conversion. There is around 140mm travel in the Quill. A Knee conversion makes some sense on a machine with a horizontal spindle.

I am preparing the drive enclosure for the 3rd drive but the mechanics of drivinig the Quill will wait on the wish list.

[Deano7/11]

that makes sense and to be honest probably the way i would go if i go the cnc path.

i would love to no what is in that box and how it is all done.

do you now how they do the quill?