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Hello, All, I have been considering a conversion of my mini-mill to CNC.? I don't do any commercial machining, only my own projects, many of which are tools and accessories for other machine tools.

Printed a couple of calibration cats.Basically the STL is for calibration. STL is available off the web, any problems I can send it from here. First a standard size basically 20 mm square 30 mm

Me - I would vote for the less useful units - links, chains, rods, parsec, astronomical unit, light-year - <g> But, for a lathe, I could see pitch being useful, you would program the threads per unit

I added a 20x4 lcd using Ic2. Now I have 2 sketches that display either mm or In, based on the mm/in mode switch, and calculate the other unit and display it on a second line. I'm going to play with

You are correct of course, I have been reading too many bits of code the majority being 24bit. Richard

The code is written for a 20 bit value and a 1 bit sign. If you look at the code, you will see this. The 21st bit is the sign. Then the rest of the bits are ignored. All the chinese inexpensive

Thanks, John! -- Regards, Charlie New Jersey, USA *MURPHY'S CONSTANT: Matter will be damaged in direct proportion to its value.*

Hi John What type of oil? (to go with boot polish) ThanksPrasad

Which part of the data manipulation are you querying? And in the sketches you posted? Richard

BTW, if anyone knows of a reference that explains the data manipulation as used in these sketches, please let me know. Chuck

I built a DRO-550 for my X2 mill. It works great. The mill was purchased second hand, and the previous owner had a DRO-550 on it. He kept the DRO, but left the scales installed. I built a new DRO-550

Reading this I don't think I was really clear with this posting. Notice at the end of this web page link that the DRO is an open source project. That means if you want to be able to read different

I have the DRO-350 and also a DRO-550 that I never did use. http://www.shumatech.com/web/products/dro-550 John Dammeyer

From what I have seen a scale will be read as 24bits ones compliment therefore having 23bits of data plus a sign bit. It will typically have a raw unit of measurement of 1/20480 of an inch. Having

Hi Charlie. Oil and boot polish for steel parts.very much a similar process to gun bluing I think, Never owned a gun so maybe I am wrong. There are some good You tube videos on homeshop colour

Photo of a ER 20 collet tray as mentioned previously by members. The finish could of been better and but I just wanted to see the results of high feeds and 0.38mm steps per layer using a .4 mm dia

Interesting to look at where all this came from, I found you code matches another I found, and there were lots of other references. It seems that your calipers use the chinese protocol. That protocol

I can't seem to get the two sketches combined to read the units bit and calculate the measurement based on that bit. Here is the two sketches that work, one for mm, one for in. Both depend on the

Yes, I understand that. I have a second sketch that does exactly that. I want to combine the two so depending on units mode the output is correct. I could add the in code you show as result 2 and