Replacement Knobs, Feet and Fittings for Test Equipment

[Qw3rtzuiop]

Here is my Keithley 236 banana jack faceplate:
https://www.prusaprinters.org/prints/26153-keithley-236-front-panel-output-connectors

[TERRA Operative]

I recently made an adapter plate to allow for the installation of front binding posts on my HP 6644A System Power Supply.
It should fit other similar models, so someone might find it useful.

https://www.thingiverse.com/thing:4299873


I also have a request, if someone can accurately draw up the rear feet for a Tek 2445 Scope and supply a STEP file, I'd be eternally grateful.

[JohnPi]

Here's a knob for an Agilent E3642A Power Supply -- likely it will fit others with similar knobs.

It's about 30 mm in diameter with knurls. It fits on the 1/4" (6 mm) shaft with a flat on one side.

https://www.thingiverse.com/thing:4369323

[bitseeker]

Nicely done. The style and size actually appears to be the knob (E3632-40003) for the E3631A, E3632A, E3633A and E3634A. https://www.keysight.com/my/partDetail/E3632-40003

(click to enlarge)

Very similar is the knob (33120-87401) for the 33120A where the ribs are only about half of the depth of the knob, but same diameter.
https://www.keysight.com/my/partDetail/33120-87401

(click to enlarge)

The knob (E3640-40003) for the E364xA series looks a bit different and is 25mm in diameter at the base.
https://www.keysight.com/my/partDetail/E3640-40003

(click to enlarge)

They all have the same shaft.

[Gandalf_Sr]

Having had less than spectacular results with FDM-printed parts, I ordered an SLA printer which is supposed to arrive on Friday.

I started a thread on it here

[TheDefpom]

Having had less than spectacular results with FDM-printed parts, I ordered an SLA printer which is supposed to arrive on Friday.

I started a thread on it here

Some recommendations which may help with the 3D printing.

Try to avoid ABS, it is tricky to get right as it requires very good environmental control, dried material, etc. I prefer PETG for items that I want to be stronger than PLA.
If you are printing relatively small parts swap your nozzle out to one with a smaller orifice, I use a 0.3mm instead of a 0.4mm most of the time, it results in slower prints, but the detail is better.
Reduce the layer height, again this slows down the print a lot, but improves detail a fair bit, I use 0.1mm a lot of the time, and sometimes even 0.05mm.
Print slower... going slower almost always improves the quality (you may need to reduce your nozzle temp to compensate so you don't degrade the material, anything to do with processing plastics at temperature is a balance between temperature and residence time).

[Jay_Diddy_B]

Hi,

I recently designed a replacement power button push-rod for the Xantrex (Sorensen) XT, XTS and HPD range of power supplies.



Here is a picture of the model:




Detail




I have attached the Fusion 360 files. If you use this you will have to adjusted the dimensions to get it to fit.

Regards,
Jay_Diddy_B


 xantrex rod final.zip (203.24 kB - downloaded 258 times.)

[CatalinaWOW]

Almost too trivial to post.  Foot for HP 4935A.  It is pretty generic so will work for many applications.  ZIP file contains FreeCAD format and .stl

[Jay_Diddy_B]

Hi group,

I would like to share a tilting foot assembly that I have been working on a Wavetek 957A Microwave Source. I am sure this could be adapted for other applications

This is a two part foot that has idents at 0 and 95 degrees:





Here are some pictures from the model:










3D Printing

The two parts are printed together assembled. There is a small gap of 0.15mm between the two parts in the model.

Photographs






Regards,
Jay_Diddy_B

[CatalinaWOW]

Nice work Jay Diddy

[jjoonathan]

Wohoo, my first 3D printing project, and half of it was a success!





I made some feet and a front panel (more of a bar, really) to bring the outputs of my SMU to the front. I am super happy with the feet, but the 3D printed front panel was a bit of a dumpster fire. It was too large for my printer so I had to split it in two, and then the dimensional accuracy was so poor that I couldn't get dovetails to mate without very loose tolerances (20 thou!) and external support, and then the rigidity was too poor to push banana jacks in without horribly deforming it, so I put a sheet metal support strip on the top and bottom, but it was so damn ugly at that point I couldn't possibly suffer it to live so I gave up and machined the damn thing out of Aluminum manually. While manually machining it I messed up the origin (I forgot about the taper of the Keithley front panel) but I decided to live with it instead of tossing more booze into the dumpster fire.

Anyway, I put the feet on Thingverse: https://www.thingiverse.com/thing:4457682

[leighcorrigall]

Anyone know where to buy Keithley 2000 or 6485 rubber front feet?

[Ankorjd]

Dear Jay_Diddy_B,

Very interesting work you made regarding the Wavetek 957A. I am interested in adapting the parts you developed for an Adret generator. Could it be possible to receive a copy of your files?

With my best regards

Ankorjd

[Jay_Diddy_B]

Hi group,

Here are some design to replace HP Agilent Keysight parts 5040-1674 and 5040-1676.

These covers are often missing when equipment is sold on the secondary market.

5040-1674



These are used on:

6571A, 6572A, 6573A, 6574A, 6575A
6671A, 6672A, 6673A, 6674A, 6675A

85301A-E95, E4356A, E4370A, E6189A, E6238A


5040-1676

AC Input Safety Cover



These are used on:

6571A, 6572A, 6573A, 6574A, 6575A
66000A, 6671A, 6672A, 6673A, 6674A, 6675A
6811A, 6811B, 6812A, 6812B, 6813A, 6813B
6841A, 6842A, 85301A-E95, E4356A
E6189A, E6238A

More pictures in this thread:

https://www.eevblog.com/forum/testgear/hp-6671a-option-j05-j09-5v-250a-power-supply/msg3252034/#msg3252034

Regards,
Jay_Diddy_B
 bus bar cover.zip (140.95 kB - downloaded 213 times.)

 line input cover.zip (44.74 kB - downloaded 231 times.)

[dl6lr]

Just found this thread and thought I can contribute.

Gould K-105D input key. May fit other instruments. This is a push fit, so maybe you have to twiggle a bit with the settings.

https://www.thingiverse.com/thing:3117369

Regards,

Bernd

[Lestron]

Foot and fold out stand for Keithley source meter 236, 237 238
Made mine out of Petg as they are stressed in operation and I was worried about strength.
Works well.

[Lestron]

Card Guide for Fluke 8505 8506 meters
The originals get brittle with time, and are made of unobtanium.

[Jay_Diddy_B]

Hi,

I am going the to share the files for a replacement for the HP 4040-1686 bus cover. This was used on the HP 6012A Power supply. Most of the units sold are missing this cover. The design was based on the photograph of an original part and dimensions measured on the power supply.

3D Model








The cover is held in place by two 6-32 by 1.5 inch screws.

Photograph

I have printed this in PLA.




I have attached a zipfile containing the STL file.

Regards,
Jay_Diddy_B

 HP_6012A_Bus_Cover.zip (68.24 kB - downloaded 194 times.)

[Jay_Diddy_B]

Hi,
I am going to share another output cover. This is a replacement for the HP 0360-2191.

This part was used on the following products:

6023A, 6028A, 6033A, 6038A
6541A, 6542A, 6543A, 6544A, 6545A
6551A, 6552A, 6553A, 6554A, 6555A
6641A, 6642A, 6643A, 6644A, 6645A
6651A, 6652A, 6653A, 6654A, 6655A
6811A, 6811B, 6812A, 6812B, 6813A, 6813B
6841A, 6842A
85108L,
85301A-E91
E3784A
E4350B, E4351B
E6187A, E6188A
E6242A, E6248A

In many case these covers are missing.

Original Part




Photographs

I chose to modify the design slightly, so it works better with my 6654A power supply.

I printed this in PETG.










I have attached a zipfile containing the STL file.

Regards,
Jay_Diddy_B
 Output cover JDB.zip (37.22 kB - downloaded 209 times.)

[Jay_Diddy_B]

Hi group,

One more bus bar cover. This is the HP 5040-1626. This cover was used on the following units:

6010A, 6011A, 6012B, 6015A
6030A, 6031A, 6032A, 6035A

Original Cover




In this case I have one of the original parts that I was able to measure:




Printed Part

The the cover was designed in Fusion 360.  Here is a photograph of the printed part:




It takes about 7 hours to print on my Flashforge Dreamer.

It installs on the power supply with three M4 x 12 screws:




I have attached a zipfile containing the STL file.

There is an updated version here:

https://www.eevblog.com/forum/testgear/replacement-knobs-feet-and-fittings-for-test-equipment/msg3286082/#msg3286082

Regards,
Jay_Diddy_B

 HP 6012B bus JDB.zip (72.35 kB - downloaded 187 times.)

[TERRA Operative]

Hi,
I am going to share another output cover. This is a replacement for the HP 0360-2191.

This part was used on the following products:

6023A, 6028A, 6033A, 6038A
6541A, 6542A, 6543A, 6544A, 6545A
6551A, 6552A, 6553A, 6554A, 6555A
6641A, 6642A, 6643A, 6644A, 6645A
6651A, 6652A, 6653A, 6654A, 6655A
6811A, 6811B, 6812A, 6812B, 6813A, 6813B
6841A, 6842A
85108L,
85301A-E91
E3784A
E4350B, E4351B
E6187A, E6188A
E6242A, E6248A

In many case these covers are missing.

..........


Regards,
Jay_Diddy_B
(Attachment Link)

I beat you to it,    although I haven't printed mine yet, it's more an exact copy from the original to be modified as needed, no guarantees on printability...

https://www.thingiverse.com/thing:4122457

[Jay_Diddy_B]

I beat you to it,    although I haven't printed mine yet, it's more an exact copy from the original to be modified as needed, no guarantees on printability...

https://www.thingiverse.com/thing:4122457

[Humour]

I don't believe it counts unless you post it on the EEVblog 

[/Humour]

I have printed yours. Here are some photographs:




This from the slicer, showing how I printed the part including the supports and the brim.
I printed it in PETG with 40% fill.




This is the part still in the printer, cooling down.




The finished part weighs 13g.

By comparison, my part weighs 17g. It is slightly bigger and has a larger wall thickness.




Here are the two parts side by side. Mine has thicker webs to increase the strength. The NFM design is true to the original.

[ Specified attachment is not available ]


The original design and NFM's is probably better for the HP 6033A. My modified design is probably better for the HP 6654A etc. It is because the large slots line up better.

Regards,
Jay_Diddy_B

[TERRA Operative]

Oh nice. How's the wall strength on the one I designed? Easy to break or strong enough?

I think yours would be more practical in daily use due to the added strength. Mine is more a base design to modify from or for 'purists' hahaha.

[Jay_Diddy_B]

Oh nice. How's the wall strength on the one I designed? Easy to break or strong enough?

I think yours would be more practical in daily use due to the added strength. Mine is more a base design to modify from or for 'purists' hahaha.

In PETG they are both okay. In PLA the larger webs are probably better.
It takes about 2.5 hours to print. I am reluctant to break one.

Jay_Diddy_B

[Jay_Diddy_B]

Hi,

Group here is a new version of the HP 5040-1626. I have fixed a flaw in the file that I shared earlier. There was a very small gap at the location shown in this photograph:




I have closed the gap and added a fillet.

The new file is attached.

Regards,
Jay_Diddy_B

 HP 6012B bus JDB v6.zip (91.48 kB - downloaded 184 times.)