HI,
I am using the included Bolt Factory add-on with Blender 2.93.4 and when I add bolts they come in way to large for my scene. By default the bolt is about 18 meters long and need ones that a more like 80 mm long. I would like to be able to shrink the entire bolt evenly while creating it so I can adjust the length and pitch to my desire, but I do not see away to do that. Anyone know a work around or something obvious I am missing?
Hi there,
well, this is a known issue and not yet really fixed within Vers. 0.4.0 of the add-on. (Thus I am not shure whether to be fixable at all)
The add-on is intented to use mm as size-values. The factory-settings of blender are using meters.
For me the work-arround is:
Setting the units in Blender to mm and the unit-scale to 0.01 - the sizes are then correct accoring to the presets (m3 f.e.) etc.
If you try to adjust the mesurements without this, you are struggeling with the pitch value, which does not allow less than 0.1 - which leads to strange effects.
Well, I found out, that you can switch back to meters without any issues while letting the unit scale value at 0.01. 
I came here looking for an answer to this question.
I really wish Blender didn’t base everything on meters. Most of the time, I’m modeling things that are much smaller than a meter.
I tried adjusting the unit scale, but problem is, that scales down everything in the scene.
If i belive you have the same issue as me the i think I found a “Solution”.
I edited my createMesh.py file to the following.
from:
GLOBAL_SCALE = 0.001
to:
GLOBAL_SCALE = 1
i get to then keep my scene scale at 0.001 for mm and bolt now are correct
*This only seems to happen in blender 4.2 not 3
where can I find this file?
found it, for me it was on
C:\Users|user|\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\blender_org\boltfactory\
line 21
I set up an account just to reply to this comment to say THANK YOU SO MUCH, THIS HAS BEEN BUGGING ME FOR MONTHS!!! <3
No problem
Thanks, editing GLOBAL_SCALE works for me. Tiny bolts had been frustrating me for a while. As a trivial footnote - I also removed “/ 1000.0” from all the parameters in the preset files in presets/operator/mesh.bolt_add.
Thanks! Bolts are big now and are not stuck to a max of 0.25mm in dia. Good job guys!
Thanks for the fix of preset, much appreciate.
It’s not much different for me
version blender 4.5
C:\Users\User\AppData\Roaming\Blender Foundation\Blender\4.5\extensions\user_default\boltfactory
file createMesh.py (line 548)
adjusted_scale = 0.001 / scene.unit_settings.scale_length
→
adjusted_scale = 1 / scene.unit_settings.scale_length