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ENGINEER.48

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Active mechanical designer / Mechanical design experience [20 years] I provide design know-how cultivated through practical experience and real information that is not found in textbooks and is useful in the field.

What happens to the torque of the motor when the speed is reduced by an inverter?

2025/8/23    

  This is a supplementary article on inverter control and a note on "What happens to the torque of a motor when the speed is reduced by an inverter?  The purpose of the inverter is to adjust the motor speed Inverter ...

serial dimensioning

Difference, inclusion, and use of progressive, series, and parallel dimensions

  This section is a memo on the difference between, how to include, and how to use progressive, series, and parallel dimensions in mechanical drawing. The way to include dimensions depends on the company and the part being handled, but here are the differences and general ...

A story about how I thought I could design a machine there by myself because 3D CAD drastically reduces design errors.

2024/3/28    

Today's story is "I thought I could design a machine there by myself because 3DCAD drastically reduces design errors. The title is long again today. The other day, I started designing with 2DCAD for the first time in a while ...

Things to note about the type generated by the CAD data download service and the notation in the catalog

Today's note is about "things to watch out for in the type and catalog notations generated by CAD data download services". I would like to write about a mistake I made the other day in a row.

Summary of everyone's opinion that machine automation is difficult and has many challenges

2025/11/13    

  Today, I would like to note the results of a survey I recently conducted on Twitter, "Do you think this kind of service would make it easier for machines to become automated?" I would like to report the results of the survey and provide some additional information. Raw ...

You can't design something if nothing is set in stone.

The work of mechanical design has a sequence of answers somewhere in its conditions. But it is quite difficult to find it.

  Today, I have a super sympathetic note about "There is an order to answer in the mechanical design work in its conditions somewhere. But it's pretty hard to find it. I was reading an article that resonated with me ...

How to calculate torque from kW (rated output) of motor

2025/8/23    

  Here is a note on "How to calculate torque from kW (rated output) of a motor", knowledge that is sometimes necessary when selecting a motor. When designing a machine, power is sometimes expressed in kW ...

Ball screw

The following is a summary of ball screw materials from each manufacturer for your reference.

2024/1/20    

Today's note is about "Ball Screw Material Summary of Each Maker". The other day, I had a chance to use Power Lock for THK's ball screw (shaft end), and at that time, I needed to check the material (strength) of the ball screw shaft.

Anti-resonance/vibration couplings

2020/5/2    

Today's note is about "anti-resonance/vibration couplings". Many of you already know about this, but I thought it was "great" again at a recent job I was involved in, so I thought I would share it with those who are suffering from resonance/vibration in equipment that handles servos, and especially those ...

Calculation of approximate circumference of timing belt and distance between shafts

2020/7/26    

Today's note is on "Calculation of Approximate Circumference and Distance Between Shafts of Timing Belts". This is a formula that you can use when you assume the distance between shafts of a timing belt during the design process. In addition, this article is about "Calculating the approximate circumference and axial distance of a three-star belt (tie ...