Draft Workbench - why is my pattern so faint?

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rhombus
Posts: 25
Joined: Fri Sep 20, 2019 7:05 pm

Draft Workbench - why is my pattern so faint?

Postby rhombus » Mon Oct 14, 2019 7:03 pm

Another beginner question. I'm following the tutorial in the Manual: Traditional 2D drafting https://www.freecadweb.org/wiki/Manual: ... D_drafting.

When I try to set a pattern following the instructions, the resulting pattern appears to be very faint. Compare the image in the tutorial with my screenshots:
pattern1.png
pattern1.png (115.99 KiB) Viewed 438 times
pattern2.png
pattern2.png (94.77 KiB) Viewed 438 times
Any idea what might be going on here?

I've also attached the FreeCAD file for reference
2d_drafting_tutorial.FCStd
(17.04 KiB) Downloaded 12 times
Roy_043
Posts: 540
Joined: Thu Dec 27, 2018 12:28 pm

Re: Draft Workbench - why is my pattern so faint?

Postby Roy_043 » Tue Oct 15, 2019 7:38 am

Your Pattern Size is 0.05. In the tutorial it is 0.005.

Before changing this value you may need to change your Units settings:
Menu > Edit > Preferences... > Click on General in the left bar > Activate the Units tab > Change the number of decimals to a higher value.
Roy_043
Posts: 540
Joined: Thu Dec 27, 2018 12:28 pm

Re: Draft Workbench - why is my pattern so faint?

Postby Roy_043 » Tue Oct 15, 2019 8:05 am

I seem to remember a discussion about the "Number of decimals" setting and how it should not restrict user input (as it does here*). I cannot find it now. Was a conclusion ever reached?

* If the number of decimals is 2 the user cannot enter 0.005 for the Pattern Size.
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pl7i92LCNC
Posts: 209
Joined: Tue Mar 12, 2019 3:03 pm
Location: RLP DE

Re: Draft Workbench - why is my pattern so faint?

Postby pl7i92LCNC » Tue Oct 15, 2019 12:12 pm

this is how the people how make things like that shoudt konsidder in first place
please mark the tread as solved
if it is posible give the ttread a Patternsize in name
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DeepSOIC
Posts: 7149
Joined: Fri Aug 29, 2014 12:45 am
Location: Saint-Petersburg, Russia

Re: Draft Workbench - why is my pattern so faint?

Postby DeepSOIC » Tue Oct 15, 2019 1:38 pm

Roy_043 wrote:
Tue Oct 15, 2019 8:05 am
I seem to remember a discussion about the "Number of decimals" setting and how it should not restrict user input (as it does here*). I cannot find it now. Was a conclusion ever reached?
I remember there was at least one such discussion, probably more than one. Couldn't find it either.

I recommend setting precision to 8 decimals (8 because it's enough to be within standard tolerance of 1e-7 mm after rounding). Sure it may look ugly, but at least it should prevent nasty surprises.
rhombus
Posts: 25
Joined: Fri Sep 20, 2019 7:05 pm

Re: Draft Workbench - why is my pattern so faint?

Postby rhombus » Tue Oct 15, 2019 1:55 pm

Roy_043 wrote:
Tue Oct 15, 2019 7:38 am
Your Pattern Size is 0.05. In the tutorial it is 0.005.

Before changing this value you may need to change your Units settings:
Menu > Edit > Preferences... > Click on General in the left bar > Activate the Units tab > Change the number of decimals to a higher value.
Hi Roy -- thanks for your reply and the hint; before posting I'd already tried adjusting the precision (and entering 0.005 as the pattern size) and it only makes the display issue worse:
pattern3.png
pattern3.png (111.55 KiB) Viewed 327 times
pattern4.png
pattern4.png (91.58 KiB) Viewed 327 times
I don't understand what the pattern size means. Is it the spacing between the lines?
rhombus
Posts: 25
Joined: Fri Sep 20, 2019 7:05 pm

Re: Draft Workbench - why is my pattern so faint?

Postby rhombus » Tue Oct 15, 2019 1:57 pm

DeepSOIC wrote:
Tue Oct 15, 2019 1:38 pm
Roy_043 wrote:
Tue Oct 15, 2019 8:05 am
I seem to remember a discussion about the "Number of decimals" setting and how it should not restrict user input (as it does here*). I cannot find it now. Was a conclusion ever reached?
I remember there was at least one such discussion, probably more than one. Couldn't find it either.

I recommend setting precision to 8 decimals (8 because it's enough to be within standard tolerance of 1e-7 mm after rounding). Sure it may look ugly, but at least it should prevent nasty surprises.
Thanks for the hint. As I've written in my reply to Roy, increased precision doesn't resolve the issue. I can enter 0.005, but the problem only gets worse.
rhombus
Posts: 25
Joined: Fri Sep 20, 2019 7:05 pm

Re: Draft Workbench - why is my pattern so faint?

Postby rhombus » Tue Oct 15, 2019 2:37 pm

Okay, something isn't right with my display.

Proceeding with the same tutorial, I made the arc for the door. The tutorial doesn't mention this, but clearly, the arc uses a dashed line, so that's what I set.

Here's the original arc (selected), draw style set to 'Solid':
arc2.png
arc2.png (115.36 KiB) Viewed 321 times


Here's the arc with the draw style set to 'Dashed':
arc3a.png
arc3a.png (112.99 KiB) Viewed 321 times

Is this caused by some view setting? Or is it a driver problem?
Roy_043
Posts: 540
Joined: Thu Dec 27, 2018 12:28 pm

Re: Draft Workbench - why is my pattern so faint?

Postby Roy_043 » Tue Oct 15, 2019 5:05 pm

You should post your FreeCAD version info (see pink banner).
rhombus
Posts: 25
Joined: Fri Sep 20, 2019 7:05 pm

Re: Draft Workbench - why is my pattern so faint?

Postby rhombus » Tue Oct 15, 2019 9:21 pm

Sorry, here is my version info:

OS: Gentoo/Linux
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.Unknown
Build type: Release
Python version: 3.6.5
Qt version: 5.12.3
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Germany (de_DE)