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1

How to create cogs in Illustrator

Explorer ,
Sep 14, 2020 Sep 14, 2020

Hi,

I have to make a technical illustration in Illustrator. It should show the main drive of a car. That means some cogs driven by a toothed belt. But how to design cogs with rounded teeth? All descriptions and tutorials show solutions using circles and stars – but the outcome always contains sharp edges. In my illustration the cogs have to have round edges (like the cogs of a bicycle).

Help!!

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correct answers 1 Correct answer

Community Expert , Sep 14, 2020 Sep 14, 2020

Diese Zahnkränze habe ich konstruiert.

Bildschirmfoto 2020-09-14 um 22.01.49.pngexpand image

 

nur so geht das exakt. Ein Musterpinsel würde immer verzerrt werden, wenn der Pfad in Kurven geht.

Einen Stern runden geht mit dem Ecken-Widget: Stern aktivieren und dann mit dem Direktauswahl-WZ das Widget ziehen:

Adobe-Illustrator-CC-2017ScreenSnapz008.pngexpand image

 

Ich konnte das in dem Beispielbild nicht so genau sehen, aber einige der Zahnräder sahen so aus (es sei denn, diesind im Detail noch etwas anders)

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Community Expert ,
Sep 14, 2020 Sep 14, 2020

The best way is probably to create a pattern brush from something similar to the path at the top. Then you can fine-tune the shape:

Screenshot 2020-09-14 163627.pngexpand image

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Explorer ,
Sep 14, 2020 Sep 14, 2020

Hi Doug, thanks a lot. I'll try that.

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Explorer ,
Sep 14, 2020 Sep 14, 2020

Hi Doug! But how I get the "little wave segment" to the circle?

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Explorer ,
Sep 14, 2020 Sep 14, 2020

Hi Doug, Monika found a way that works perfect for me. Thanks a lot for your support.

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Explorer ,
Sep 14, 2020 Sep 14, 2020

Maindrive_Kit_04_frontal.jpgexpand image

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Community Expert ,
Sep 14, 2020 Sep 14, 2020

You could start with a star and then round all the corners. Does that not work?

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Explorer ,
Sep 14, 2020 Sep 14, 2020

Hi Monika, wie runde ich denn Ecken in Illustrator? Ich habe dein Buch "Illustrator CC". Dort zeigt auf Seite 598 die Abb. 17.59 die Zahnkränze eines Fahrrads. Wie macht man die?

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Community Expert ,
Sep 14, 2020 Sep 14, 2020

Diese Zahnkränze habe ich konstruiert.

Bildschirmfoto 2020-09-14 um 22.01.49.pngexpand image

 

nur so geht das exakt. Ein Musterpinsel würde immer verzerrt werden, wenn der Pfad in Kurven geht.

Einen Stern runden geht mit dem Ecken-Widget: Stern aktivieren und dann mit dem Direktauswahl-WZ das Widget ziehen:

Adobe-Illustrator-CC-2017ScreenSnapz008.pngexpand image

 

Ich konnte das in dem Beispielbild nicht so genau sehen, aber einige der Zahnräder sahen so aus (es sei denn, diesind im Detail noch etwas anders)

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Explorer ,
Sep 14, 2020 Sep 14, 2020

Ganz wunderbar, Monika. "Präzision" ist das Zauberwort für die Firma, die diese Grafik beauftragt hat. Das klappt prima mit dem Stilisierungsfilter "Ecken abrunden". Ganz vielen Dank und noch einen schönen Abend aus Stuttgart.

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Community Expert ,
Sep 14, 2020 Sep 14, 2020

Schön, dass es jetzt klappt!

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Community Expert ,
Sep 15, 2020 Sep 15, 2020

This may also be useful for creating gears:

When looking for a script I stumbled upon this gear script from Jongware, the Gyro Gearloose of scripting.

It was mentioned here: https://community.adobe.com/t5/indesign/scriptui-for-dummies/m-p/2970630?page=2

You can download it from his web site: http://www.jongware.com/binaries/gearup.zip

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Explorer ,
Sep 15, 2020 Sep 15, 2020

Hi Ton, thanks a lot for your proposal. But anything about programming for my mind is completely out of reach. Monika's solution works well in my project. Greetings from Stuttgart.

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Community Expert ,
Sep 15, 2020 Sep 15, 2020

The script is very user-friendly. It simply opens a dialog window where you can set the parameters of your gear.

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Community Expert ,
Sep 15, 2020 Sep 15, 2020

Andreas, like Doug said, it is very easy to use.

Either install the script ( https://helpx.adobe.com/illustrator/using/automation-scripts.html )

or just select it from File > Scripts > Other Script...

GEAR SCRIPT.pngexpand image

 

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Community Expert ,
Sep 15, 2020 Sep 15, 2020

Below is an older graphic style approach. Some fun to play with.

 

https://drive.google.com/file/d/1UzG0FRHkpYvR-GX5CRTrWw6qnhpS4i4F/view?usp=sharing

 

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Explorer ,
Sep 16, 2020 Sep 16, 2020

Hi you guys, thanks a lot for your support. The drawing is making progress. The components are nearly done. Just the toothed belt is missing (see the attachment). But ... there is one more thing: As you see in the other attachment – showing a part of a pump – there is this "line structure" (German: "Schraffur"). How do I do that?

Belt.pngexpand image

Pump.pngexpand image

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Community Expert ,
Sep 16, 2020 Sep 16, 2020

I assume the tooths of that belt should not be distorted. You could use a combination of a scatter brush (Spezialpinsel) and a simple stroke to create it. Apply two strokes in the appearance panel for that.

As for the Schraffur: use a pattern. You can create a horizontally striped pattern with the pattern editing mode, then apply it and rotate it when it's applied to the shape.

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Explorer ,
Sep 16, 2020 Sep 16, 2020

Hi Monika, das mit dem "Zahnriemen" kriege ich hin. Das mache ich einfach "von Hand" und setze die "Zähne" einzeln drauf. Ich habe ja die kleinen "Halbkreise" aus den Zahnrädern. Wo der "Zahnriemen" hinter dem Zahnrad liegt, sind die Zähne schon da.

Das "Muster" macht mir Sorgen. Das blicke ich garnicht. Die Lösung von früher "Linien gleichmäßig untereinander duplizieren, gruppieren, drehen, an die Stelle des Kreises rücken, ausschneiden und innen in das Objekt einfügen" (wie in Illustrator 7.0 – lange her) geht ja in CC nicht mehr. Wie macht man denn ein einfaches Muster aus Linien?

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Community Expert ,
Sep 16, 2020 Sep 16, 2020

Innen einfügen (also Schnittmaske) ght schon noch.

Einfach die Linien ausschneidenund in den Innen-zeichnen-Modus gehen. Dann an der selben Position einfügen.

EIn Muster aus Linien ist auch einfach, allerdings nur für horizontale oder vertikaleLinien, für gewinkelte Linien ist es nicht einfach.

Eine Linie ziehen und Objekt > Muster > Erstellen. Dann den Abstand bestimmen und auf Fertig klicken.

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Explorer ,
Sep 16, 2020 Sep 16, 2020

Vielen Dank, Monika. Habe jetzt die Linien angelegt und (dort wo man sie jetzt noch sieht) ausgeschnitten. Aktiviere dann einen der Kreise (den gelb eingefärbten mit rotem Rand) und ... wie geht nochmal der Innen-Zeichnen-Modus?

Bildschirmfoto 2020-09-16 um 23.19.40.pngexpand image

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Explorer ,
Sep 16, 2020 Sep 16, 2020

Ähem, steht auf S. 377 ff im Buch "Illustrator CC" von Monika Gause. OK, ich schaue nach und probiere es aus. War spät gestern abend und die Frage vielleicht voreilig. Schau'n mir mal. Lieben Gruß.

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Explorer ,
Sep 17, 2020 Sep 17, 2020

Schnittmenge hat geklappt, Monika. Vielen Dank. Jetzt müsste ich die "Nasen" des "Zahnriemens" konstruieren. Ich dachte, ich nehme einfach den "Zwischenraum" zwischen 2 Zähnen des Zahnrads. Da pirsche ich mich jetzt heran (siehe 2 Bilder im Anhang). Aber beim Löschen der letzten Ankerpunkte "schnappt das ganze rüber" und ändert die Form. Mmmh, was meinst du?

Bildschirmfoto 2020-09-17 um 12.50.32.pngexpand image

Bildschirmfoto 2020-09-17 um 12.51.18.pngexpand image

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Explorer ,
Sep 17, 2020 Sep 17, 2020

Hi Monika, bin inzwischen etwas weiter. Habe das "Stückle" aus dem Zahnrad als Pfad in Photoshop eingefügt. Dort konnte ich die Ankerpunkte löschen. Danach "den Rest" in Illustrator wieder eingefügt und kann so das kleine runde Element als "Zahn" für den "Zahnriemen" einsetzen. Püüüh!

Bildschirmfoto 2020-09-17 um 14.51.33.pngexpand image

 

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Explorer ,
Sep 17, 2020 Sep 17, 2020

Hi you guys, thank you so much for your professional and patient support. As attached the illustration was sent to the customer. So, let's see. Bye bye and stay healthy until the next thing. Greetings from Stuttgart.

Bildschirmfoto 2020-09-17 um 19.23.34.pngexpand image

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