Imperial units in marlin

Here is the code to switch your Robo Or any other 3d printer tyo imperial unit and back.

G20: Set Units to Inches
Support FiveD Teacup Sprinter Marlin Repetier Smoothie RepRapFirmware -YES to ALL
Example: G20

Units from now on are in inches.

G21: Set Units to Millimeters
Support FiveD Teacup Sprinter Marlin Repetier Smoothie RepRapFirmware
yes yes yes yes yes yes yes
Example: G21

Units from now on are in millimeters. (This is the RepRap default.)

I suspect this code has been disabled in the firmware even if it is present. I suspect the slicers do not understand the code either.

 

Why would you ever want inches?

 

Simple fact, most manufacturing in the U.S. is still done in imperial units and not metric.Other than automotive, Aircraft, and medical, most things are still designed and machined in Imperial units. Also for those small businesses that need a one off prototype are not going to want to convert to metric for one part, so the ability to accommodate is an advantage.

 

Just teasing.

I worked at a place that sold all their implants and instrumentation in MM, but designed it all in inches.

 

I've built both medical equipment and worked for a Metal Fabrication shop that made aircraft parts. Everything was done in inches, except for the oil filed parts, lol

 

The worst part about industrial equipment is that nothing is actually a size that makes sense.

1" SCH 40 is 1.313 OD and 1.048"

Real cool guys


I hate working with SAE units. It's such a stupid system. Especially when people just between Bar, PSI, and in H2O. Just pick a freaking unit man.

 

The id is what schedule 40 refers to, and the .048 over size is an allowance for rust, and manufacturing variances. If you need dimension accurate tubing HREW or DOM is the way to go, lol Plus you can blame the Europeans for imperial units. Such as Railroad Guages and Roadway width is from the Romans, as in each lane, and distance between the rails, is the width of two horses asses side by side

 

I understand the nomenclature, but I still think it's stupid.

I do blame the europeans but at least they figured out how dumb it was and now use a far more efficient method

 

Just wait until you run into the old Russian units of measure or British Whitworth, lol

 

The more I look, it seems that while it is supported in Marlin, it is not implemented.
So, I need to figure out how to implement it. sigh.

 

My main point and thought is this: They are using standard G-codes that virtually all CNC machines use, and every one of them I have ran have been set to imperial through the G20 code. It just seems to me if these printer manufacturers truely want these to go main stream in the U.S. they are going to have implement this function. There are people who are simply set in their ways and will refuse to even try because they do not want to learn a new system of measurement. I'm in my 50's I learned the metric system in grade school and continued on through high school, however people who are now beginning to retire and looking for hobbies will pass this by just due to being limited to metric.