Conversion of a King Rich 3000.

[Desertrunner]

Hi all,
Just brought a King Rich 3000 and have started to convert it to CNC. I am a bit late starting the thread as I have already set up the X & Y axis. To help keep costs down I have done a couple of things different.
For example I am using 400w servo's instead of the 750 normally used. My thinking was that the ProTac guys would have used bigger motors then needed also I figured I could reduce the gearing if needed. Standard pullies are M3 15mm wide belts with 16 tooth driving 44 tooth giving 2.75 reduction. To my surprised with a bit of reconfiguring the drives I got it to work. The big surprise is that I am getting travel speeds of 4,000mm per min. Have even got it going at 5,000 but decided to back it down.
The servo gear I used have a lot of advatges because the software behaves as if it has steppers on the end of it but they are servos.
Here is a link to the supplier,
Single Axis 400W Brushless AC Servo Kit :: Servo Kits :: CNC :: Ocean Controls

Each axis cost me the same as a motor only from other suppliers.

Thats enough for now,
Have a great day.
Tony

[Desertrunner]

Due to the fact that I have to mount power supplies the power box is pretty full. Also I am seting up for 5 axis the last 2 will be steppers as they work well enough for small jobs.
I have attached the way the Z axis is coming together, hit a snag earlier in the week when I blew up the motor on my small X3 cnc drill mill. I can't buy one here for 6 weeks. So I have to take some short cuts on the set up of the Z so I can get it running and then come back to improve it later.
Have a great day.
Tony

[Desertrunner]

Here is a 3D of the Z axis setup. This pdf is 3d so if you double click the image you can have a more detailed look at the design.
Tony

[BMSTECH]

Tony,

You have inspired me to switch back to my KR mill project and get at least the X and Y axis operating. My Honda S600 project has progressed well in the last few months but I am ready for a change again.

S600 Coupe Off frame restoration - Page 11 - Honda-Tech

YouTube - Honda S600 Oil Supply to Cylinder Head

[Desertrunner]

Here is some photos of the Z axis up to compleation. I will give it a run in the morning when the locktight dries.
Tony

[Desertrunner]

Okay its all working, milled a couple of more parts for the Z axis, I want to add the limit switches as well as beaf it up a bit. I had to do a couple of parts a bit rough due to my mill problem. Now I have the new one working I can replace some bits I am not happy with. I am more then happen the unit is brilliant.
Have a few more jobs to do to tidy it up but its all good.
Tony

[Desertrunner]

Here is a little test on ran on the mill.
Tony

[Desertrunner]

I redid the Z axis support plates so it was stronger. Also installed limit switchs. I am using proximity sensors instead of micro switchs, it might be the wrong thing but I figured I would give it a go. Here are a couple of photos.
Have a great day.
Tony

[Deano7/11]

wow that was quick

do you think the 400w servos are big enough?

looking great. any pics of the x and y?

any video?

well done

[Desertrunner]

I was nervous about the 400watt motors but they handle it with out a problem. They have never overloaded and also show no signs of heat build up, from my experiance if the motor gets hot then its running at maxium load. The other sign of a problme is if you push the speed to fast they can't keep up with what the counter needs to see so they get a position error. I have had them running as high as 6,000mm per minute and not failed. At that speed its a bit hairy the table moves so fast. If I am right 400W is about 1/2hp when you think about it that is a lot of grunt just to turn a ball screw.
The Z motor could be 200W and it would still work.

I did some research with the Prototrak supplier and he said the 600W motors they use were able to run machines 3 times bigger then mine. THey just had one standard kit/motor size for most of the machines.

Haven't figured out how to post a video yet but will try soon.
Tony

[Desertrunner]

Been pretty busy at work but got an improved Z attachment to the quill built and installed the limit switch. Also managed to get a second hand touch screen so I built a enclosure for it.
Tony

[BMSTECH]

Is that room for a MPG wheel on the end of your screen enclosure? What have you got in mind to use there? Nice job. What type of keyboard do you use for input?