After a long Christmas & New Years, hiatus I started working on my shop benches again this week. On Sunday night everything was going well and I designed and built the alignment jig in about an hour. Monday night didn’t go as well. Part way through welding the first leg unit I ran out of wire. A quick look at the clock (11pm), and I knew I wasn’t getting any wire until the next day. Continue Reading…
Last week, I Used some gift cards I got for Christmas to pick up a Delmhorst J-Lite moisture meter. It’s a lower end model that requires you to manually correct the readings for temperature and species. Unfortunately the charts provided by Delmhorst are a little course.
Fortunately the data contained in the charts is fairly well behaved, and thus easily curve fitted. After an hour or two of data entry and curve fitting I cam up with an excel spreadsheet. The spreadsheet takes the following 3 Inputs.
- Temperature in °F
- The J-Lite Meter Reading (drop down list)
- The wood species being tested (drop down list)
The spreadsheet takes the inputs, and does some vlookups to determine what the corrected moisture content is. The spreadsheet can be downloaded here.
For the final installment of wall charts, I have created this basic milling speeds chart.
Please note: I am not responsible for any personal injury to, or damages caused by an individual using the information listed on my website.
file: millingspeeds.pdf
Following the theme of my recent posts, I created two more PDF charts. I’m still working on a milling chart, but I probably won’t finish that until after the new year.
- Drilling & Reaming Speeds
- Sheet Metal Gage Conversions
It took a little longer to make, but I finished up a lathe speed chart tonight. I set this chart up as an excel spreadsheet so you can customize it. The spreadsheet accepts two control parameters feed, & doc (see cells K1 & K2). Doc has 5 possible settings 1.0″, 0 .4″, 0 .2″, 0.1″, 0.04″. Feed allows for any value from 0.002″ – 0.038″.
Please note that at the higher feed settings some cells will display “N/A”. The data I pulled from the “Machinery’s Handbook” has a small range, thus I decided it was better to provide no speed when a calculated value fell out side the range. I also preformatted the spreadsheet for printing on 3 letter sized sheets of paper.
Please note: I am not responsible for any personal injury to, or damages caused by an individual using the information listed on my website.
If you’re agree to the above disclaimer the speedsheet can be download here: turningspeeds.xls 245kb
