UltraLog Project Updates
Tuesday 28
March 2006
Scale Validation
Scale files were sent to the three validators last week. Above is
an image of an enlarged printout of the scales being tested for
accuracy by Otto Van Poelje's Coordinatograph
machine.
Tuesday 21
March 2006
Scale Design
The iamges above show the practically complete scale design. Only
the constants scale will be added to in the coming weeks. Please
note: the quality of the .JPG images above is markedly lower than
the quality of the source AutoCAD files.
The scales were designed using a purpose built software
application and the AutoCAD software. The original .DWG files
will be sent to the three auditors in a few days for validation
as planned.
Fund Handling
Gary Flom, a moderator of the ISRG list who also runs the Swap
Sheet Online project of the Oughtred Society, has kindly
volunteered to handle all applications, receipts and payments. He
has done so on two previous ISRG projects and will not be
charging for his services. I will be passing to him all emails
expressing intention to purchase received by me.
Production Tests
A subset of scales was sent to a British company operating in
Hong Kong for CNC engraving and rasin filling tests. We are
expecting to receive first samples in a week or so.
Monday 6 March
2006
Scale Design
The image above shows an inspection of a draft .PDF file
generated from Delphi produced alphanumeric data. PDF is used
only as an aid to development - the scales are being brought to
their final shape in AutoCAD, in a parallel process. Intensive
programming effort during the last seven days resulted in a core
scale design, including all graduations, numbers, scale
designators and separating lines which is nearing completion.
Gauge marks, constants and self documenting symbols will go in
next. We expect to be ready for audit in 3 weeks.
Design Audit
Although we carefully validate everything we do, I have
approached several persons well familiar with slide rule design
who were recommended to me and asked them to audit the design
when completed and validate it for completion and correctness. I
am very pleased that so far three of them have agreed to assist
in this important task.
Manufacture
Discussions are ongoing with several manufacturers here and
abroad. It is beginning to look like a job that will suit a shop
specialising in rapid prototyping using CNC and I am following
this line as well.