Accuracy of spocalc/wheelcalc vs Solidworks?
06-07-11, 11:05 PM
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Accuracy of spocalc/wheelcalc vs Solidworks?
So I'm about to build a wheel and need to determine the lengths of spokes I need. I tried out spocalc and wheelcalc, and both agreed with each other (factoring in spoke tension)
Then I took advantage of my access to Solidworks, and drew up a sketch of the lacing...
The rear hub on on Solidworks agrees with spocalc/wheelcalc, but Solidworks calls for spokes on the front wheel that are ~0.8mm shorter than spocalc/wheelcalc. Unfortunately this puts me between two spoke lengths....
I am more inclined to trust Solidworks, but wondering if anyone here has any advice about this.
Then I took advantage of my access to Solidworks, and drew up a sketch of the lacing...
The rear hub on on Solidworks agrees with spocalc/wheelcalc, but Solidworks calls for spokes on the front wheel that are ~0.8mm shorter than spocalc/wheelcalc. Unfortunately this puts me between two spoke lengths....
I am more inclined to trust Solidworks, but wondering if anyone here has any advice about this.
06-07-11, 11:10 PM
#2
Insane Bicycle Mechanic
I've never had a problem with spoke calculations from Spocalc. 0.8mm isn't that much- in most cases you have 2-3mm leeway on spoke length, more if you use longer nipples or can tolerate a little spoke protrusion.
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Comcast nuked my web page. It will return soon..
Jeff Wills
Comcast nuked my web page. It will return soon..
06-07-11, 11:16 PM
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Silly me, I found out why there was that discrepancy. Wheelcalc/spocalc are both very accurate. Can a mod delete this thread?
edit: on a related note, the dtswiss spoke calculator appears to be broken...
edit: on a related note, the dtswiss spoke calculator appears to be broken...
Last edited by tim00gle; 06-07-11 at 11:20 PM.
06-08-11, 01:56 AM
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https://www.mrrabbit.net/wheelsbyflemingapplications.php
Another spoke calculator...grab the spreadsheet...
=8-)
Another spoke calculator...grab the spreadsheet...
=8-)
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5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
