Comments for anderswallin.net

Comment on First Steps With Brushless Servodrive (Microchip dsPIC + IRF IRAMS) by Administrator

Administrator — Wed, 13 Aug 2008 07:10:49 +0000

I never did finish this project…
With the prototype I got the motor to spin in both directions and also to respond to external pwm/dir commands.
The software was in C for the dsPIC and was based closely on the similar application note from Microchip. I think you are better off by starting from the Microchip example code rather than looking at my buggy code.

Comment on First Steps With Brushless Servodrive (Microchip dsPIC + IRF IRAMS) by m.sherif

m.sherif — Tue, 12 Aug 2008 20:40:37 +0000

dear.anderswallin

i want to know did u finish this project and software for dsPIC brushless
servo .
if so where can i get it

great thanks

sherif

Comment on IOM Nordic Cup, race 2 by Ole Peder Bjørsom

Ole Peder Bjørsom — Sun, 10 Aug 2008 18:07:46 +0000

Anders
The name is Scandinavian IOM Cup, that is agreed on between all countries involved, even if you disagrees your NCA chairman and many of the Finnish sailors are happy with the name.

I must remind you that the Nordic Sailing Federation is called “Scandinavian Sailing Federation” http://www.nordicsailing.org/ where also Finland and Estonia is members.

The most important race in the Nordic countries is the Nordic IOM Championship, which also happens to be a part of the SC, the namechange was done to avoid mixing these two

Comment on Timing build_kdtree() by anders

anders — Thu, 31 Jul 2008 21:56:54 +0000

Thanks for the tip. That’s an advanced tool path, let’s hope we get some basic tool paths going with open source code first…

There’s another paper on the same subject on Minh Ly’s homepage
http://www.me.uvic.ca/~mly/
the book seems to about $12 used on Amazon so I might pick it up.

Comment on Timing build_kdtree() by Thomas J Powderly

Thomas J Powderly — Thu, 31 Jul 2008 18:47:44 +0000

Anders,
I always like reading your site.
You may find this paper of some use
http://www.me.uvic.ca/~mly/PM.pdf
title:
TRIANGULATION-BASED INTELLIGENT CNC MACHINING OF INTRICATE …

Comment on Noux mk2 progress by Luciano Varchetta

Luciano Varchetta — Thu, 31 Jul 2008 11:22:15 +0000

Hi Anders,
In the answer to my question about fin measurement and positioning, you referred to the NOUX project dated 2002. But I’m building the Noux hull starting from the new layout plan dated march 8th 2006 and the positioning of the fin and mast are different from the layout of the 2002 plan. Please could you give me a suggestion about the correct positioning to adopt.
Tank you
Ciao
Luciano from Italy

Comment on Starting to build a 240mm Newtonian by anders

anders — Wed, 30 Jul 2008 19:08:46 +0000

I’ll try to blog about updates to the telescope project, and also post some pics and thoughts to the forums:

Astronetti, in Finnish:
http://foorumi.avaruus.fi/index.php?topic=2784.0

Cloudynights (probably the largest astronomy forum out there)
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/2550576/page/0/view/collapsed/sb/5/o/all/fpart/1

Comment on IOM fin and rudder moulds by Administrator

Administrator — Tue, 29 Jul 2008 07:16:05 +0000

Hi Lincoln,

The longest movement of the machine is around 500mm along the X-axis. If you want a mould longer than that we would have to cut one end of the mould first and then re-position the mould to cut the other end. There will be a visible seam between these two parts but it will likely be below 0.1 mm in height and have nor effect on performance.

If you send me a design in DXF or IGES format I can look at it and estimate time/cost. We ask around 500 euros for an IOM fin mould so a longer one would be slightly more.

Anders

Comment on IOM fin and rudder moulds by lincoln

lincoln — Tue, 29 Jul 2008 05:15:08 +0000

Can you cnc M foil mould for me?
I am in Melbourne Australia.
Lincoln

Comment on Inside the DSM system by Administrator

Administrator — Wed, 23 Jul 2008 07:24:25 +0000

Hi Roly.S,

There are omni directional antennas with at least +5 dBi gain, maybe more.

I just got an advertisement for a new TI chip “CC2591″, maybe you could use that?
http://www.ti-estore.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=CC2591EMK

I have no idea if it’s legal to boost the output power 100-fold, you’ll have to check that yourself!