Question on MJK's mathcad worksheets - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 2nd November 2006, 03:06 PM   #1
cs is offline cs  United Kingdom
diyAudio Member
Join Date: Jun 2005
Location: .
Default Question on MJK's mathcad worksheets

Has anyone else seen this issue with Martin's TL speaker mathcad worksheets :-

Assuming calculation is set to automatic in mathcad, if I scroll down until a plot is visible, it starts calculating. But, it doesn't just calculate the visible plots, it calculates all of them, even though I haven't scrolled down further.

With Martin's latest sheets (with the Part 2 and 3 sections on BSC, etc), this can take several minutes. So, if you just want to tweak a parameter, it ends up being a very slow and tedius process.

Martin says this shouldn't happen, but I've tried it on two different machines with the same result. Is there a hidden setting in mathcad I need to adjust ? I'm using Mathcad 2000 Pro.

(Martin has kindly supplied an earlier version of his MLTQWT sheet without Parts 2 & 3, which is much quicker).

  Reply With Quote
Old 2nd November 2006, 03:24 PM   #2
diyAudio Member
Ed LaFontaine's Avatar
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
Hi Chris,

I've had similar experience.
If I do not scroll into Part 2 it does not auto calc. If I do scroll into Part 2 both it and Part 3 calculate. I find if I keep my cursor in the margin of the page I can get to the response graph I'm most interested in before the calc routine begins.

I suspect the calculations are linked and supportive of one another and that "turning them off" would be difficult.
  Reply With Quote
Old 3rd November 2006, 07:55 AM   #3
cs is offline cs  United Kingdom
diyAudio Member
Join Date: Jun 2005
Location: .
Hi Ed,

I don't see this.

Even if I position the cursor in Part 1, it calculates the whole worksheet.

I tried scrolling down so that the last plot in Part 1 was visible (but not Part 2). Pressing '=' then starts the calculation, and I can see when it gets to the last plot of Part 1. But it doesn't stop, it just carries on with the very long Parts 2 & 3.

Martin is adamant that this doesn't happen on his installation, but I have tried two completely separate instals on different machines and get the same result.

  Reply With Quote
Old 3rd November 2006, 05:24 PM   #4
cs is offline cs  United Kingdom
diyAudio Member
Join Date: Jun 2005
Location: .
Sorted !

The problem is a bug in Mathcad 2000 Pro.

Tried Mathcad 8 Pro instead, and that works fine.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
mathcad worksheets brsanko Full Range 0 15th March 2009 07:53 PM
New version of Martin King's MathCad Worksheets is coming soon! Scottmoose Full Range 344 7th January 2007 11:33 PM
New versions of Martin King's MathCad worksheets Scottmoose Multi-Way 0 14th December 2005 10:05 PM

New To Site? Need Help?

All times are GMT. The time now is 06:46 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2