Dum-E the handy desk buddy. Lamp, stand, holder

Meet Dum-E, the handy desk helper industrial robot. I designed it with purpose in mind as it can function as a phone stand, webcam mount (Logitech c920) and a business card holder. It doesn't end there though, as I aim to develop this platform with further attachments in future. These may be recommended from others and/ or what I think might be useful. I hope you find it useful and please feel free to comment any recommendations for attachments you would like to see in future. Two new print profiles are now available, for the A1 mini and P1S/X1C. These are what you will need to create a maker's supply arm, with all hardware now available in the maker's supply store. They come “pre-painted” for AMS users. STL's now include a combination of LEGACY (non makers supply) and MS versions. Please take this into account when printing legacy arm print profiles from other users, as they will require the different hardware listed at the bottom. I look forward to seeing your different uses/ prints and colour schemes. Thank you for your continued support :)

 

To keep files from getting complicated, I have only included the phone stand attachment in this upload. I have placed optional attachments in a sperate upload available on my profile titled “Dum-E optional attachments”. This will be periodically updated with new wrist attachments I think may be of use or other people suggest.

 

IMPORTANT UPDATE

 

A maker's supply version of the arm is now available, saving you the hassle of having to source hardware elsewhere. The overall arm is the same functionally, with a few small modifications for maker's supply hardware. The previously required M5x30mm shoulder joint screw has been substituted for an M4x25mm button head screw. In addition, the 3 M3x15mm countersunk screws have been substituted for M3x14mm. To respect previous print profiles, previous files for the legacy arm will remain. These STL's will have the name LEGACY at the end of each file to distinguish the two. If you wish to print a legacy arm, please use the original hardware listed below. If you wish to print a maker's supply arm, the required hardware is listed below and linked to the store.

 

Boost MeAny and all boosts are really appreciated, thanks for all your support :) 

 

 

 

 

 

 

 

 

 

Printing helper

Part	Quantity	Infill	Supports required
Arm 1	1	25%	YES
Arm 2	1	25%	NO
Shoulder Joint	1	30%	YES
Wrist to attachment connector	1	40%+	YES
Turntable	1	20%	NO

Part	Quantity	Infill	Supports required
Base	1	20%	NO
Feet	1	20%	NO
XL motor	1	15%	NO
Large motor	1	15%	NO
Medium motor	1	15%	NO
Small motor	1	15%	NO

Part	QTY	Infill	Supports required
Phone stand backing	1	25%	NO
Phone stand bottom	1	25%	NO

Required for assembly

 

Superglue for fake motor attachment and Nitrile cord.

1mm nitrile rubber cord, 16cm should be enough for 1 complete arm. This is only required between joints if you intend on supporting the weight of a phone etc. Alternatively, if you have TPU filament you can use Fat Tony's handy TPU O-rings. They're a quick print and don't require superglue to fit. You can get them here: https://makerworld.com/en/models/205832#profileId-225948 Thanks again for the great alternative Tony!

 

As an optional extra, I'd recommend using 4x 3M 6mm Anti-slip sticky back rubber feet. They fit in recessed circles in the corners of the feet.

Required hardware for the maker's supply (MS) version

8x M3x10mm countersunk screws

2x M3x14mm countersunk screws

1x M3x18mm countersunk screw

1x M4x25mm Button head or countersunk screw.

 

For legacy print profile uploads (the non makers supply version) the following hardware is required: 

 

Screws: A total of 13 are required for the arm plus 3 for the phone stand, listed below.

M3x10mm - QTY 12 

M3x15mm - QTY 3

M5x30mm - QTY 1

Foot: 4x M3x10mm countersunk.

Base: 1x M3x15mm countersunk.

Shoulder joint to Arm 2 rotation point: 1x M5x30mm countersunk.

Turntable: 4x M3x10mm countersunk.

Rotation point between Arm 1 and Arm 2: 1x M3x15mm countersunk.

Arm 1 to wrist connector rotation point: 1x M3x15mm countersunk.

Coupling attachment to wrist: 1x M3x10mm countersunk.

3 M3x10mm screws are required for the Phone stand.

 

Assembly tips

Cut 3 lengths of Nitrile cord, 74, 55 and 30mm in length. Glue one side of each and cure into individual circles. These will be glued on one side between the 3 separate joints on the arm. Doing this will vastly improve the holding capacity of the arm as it will provide more friction between the joints, helping to prevent them from sagging under weight.

The 74mm circle goes between the elbow joint and arm 2.

The 55mm circle goes between the arm 1 and 2 joint.

The 30mm circle goes between the arm 1 and wrist attachment connector.

I have added 3 pictures as a guide at the end of the gallery.