Can I use 2 20v batteries to power a 40v tool?

by LiquidBeef

40v batteries for these 40v Dewalt tools are expensive, and I already have plenty of 20v batteries. Is it theoretically possible to build an adapter and use 2 20v batteries in place of a 40v battery?

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Matt Flexible Material

by PT-Designs

Hi guys,
I've been looking for a flexible filament in the range of 80-90 Shore A that creates a matt finish but couldn't find anything yet.
Do any of you have tips or experiences with various filaments in this regard?

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Baby Walker incremental wheel movement

by Moshjoshuk

Hi, I'm trying to get into 3d printing so I can bring my ideas to life. I recently had a baby boy who has started learning to walk.

Problem: His walker moves forward (or backwards) when pushed (pulled) in an uncontrolled manner. When my son attempts to pull himself up or stabilise himself, the walker shoots forward, resulting in him falling over.

I would like to design and 3d print a mechanism which attaches to the wheels of the walker (simple wooden walk bought from Amazon) which controls its forward and backward movement.

Ideally, I would like the walker to move forward, inch by inch, and only when forward force is applied.

I'm a complete newbie and don't have any engineering knowledge. However, to illustrate some of the mechanisms I thought I might need I have attached a few pictures.

Can anyone please help me?

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Need a cutout in a Thing

by Johnnii360

Hey guys!

Is there any one that can do a cut out for me in a Thing? I already asked the creator past few days of the Thing but got no reply yet.

It's this Thing: https://www.thingiverse.com/thing:2600020

On the top (playstation_pi_mini_v3_top.stl) is on the left side a fake LED spot. Here I need a proper cutout so place a real LED here. I've tried a bit to do it with Blender but I'm a bloody beginner. Never had any done with Blender.

Playstation Pi Mini V3 (Raspberry Pi 2 + 3 Case)
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Using Python programming to generate repetitive patterns

by phildc

I normally mainly use OpenScad for my designs, but some building parts are difficult or slow to create.
Here an exemple of slate roof done with Python programming:


Once the pattern is created, you just change the number of columns and rows, or the slate dimensions.

Slate roof for HO scale models
by phildc
programming python stl
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Looking for help for my master thesis - online survey

by Gamzec

Hello dear community,

I need help for my master thesis. I am examining explorative behavior on Thingiverse and how it is influenced by personality traits. Therefore I generated an online questionnaire.

I would be very happy if you could take 5-10 minutes to complete my survey:

Many thanks in advance!

Best regards
Gamze Cetin

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Cura won't print my PC Case Fan Grill completely

by Johnnii360

Hey guys!

I'm re-engineering a PC Case Fan Grill for my Fractal Define 5 White (https://www.fractal-design.com/wp-content/uploads/2019/06/Define-R5-white_21-2.jpg) because I use now Noiseblocker NB-eLoop B14-3 and they are a bit higher/thicker than regular ones.

Good, now I designed an prototype with Tinkercad and chopped it in 2 parts to can print both in one go. BUT Cura won't these 2 parts shown here on the picture (violet circles). I already tried some variations with and without support, used a alternative Cura version and so on. But in this position Cura ignores these to parts.

Does anyone have an idea?

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stepper motor won't go backwards

by duelistjp

i decided to upgrade my stepper motor. got a new one and installed it. pairs are right and have a connection to the plug as i can short out the pins and it gets hard to move. i installed it and at low steps/mm it is fine. when i increase them since it only moves like 6mm on the settings my old one moved 100mm i get into problems. forward still seems to work but when i get up past 1000steps/mm i can't reverse. it locks up making noise but not moving. i wondered if it was my micro step settings and have played with the jumpers to 1/8 instead of 1/16 but with no change. did i get a bad stepper or am i doing something wrong. it is a makerbase gen l v1.0 board with a4988 drivers if that matters

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Please participate in a survey of Thingiverse members

by SidB

Hi everyone,

I am interested in studying the use of 3D printing technology by individuals. Specifically, I am working on a study, for my dissertation, that explores key factors likely to influence Thingiverse members’ intentions to contribute their 3D printable designs to Thingiverse.com.

As part of this study, I would like to invite you to participate in an online survey that should not take more than 20 minutes of your time. You need to be over 18 years of age and be a member of Thingiverse (i.e., have an account on Thingiverse) to participate in this survey. Also, you should not have participated in this study (i.e., in its pilot survey) previously. All participants are eligible to enter their name and email ID into a drawing for a chance to win one of the following Amazon.com eGift cards:
• One $500 eGift card
• Two $200 eGift cards
• Five $100 eGift cards
Only one entry per participant is allowed. Due to a lower than expected response rate, we have had to extend this survey. This drawing will now be conducted before March 31, 2022, and winners will be notified via email.

I would like to thank you for your time spent in reading this post and would be happy to answer any questions about this study. In order to protect your privacy, I would encourage you to use either email or personal message (via Thingiverse).

To participate in this survey, which will end at midnight on March 11, 2022, please click on the link below.

Best regards,

Siddharth Baswani
PhD Candidate
Ivy College of Business
Iowa State University
Email: sbaswani@iastate.edu
Phone: (515) 294-1473

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