Posts made by JuJuDelta

Hi,

If anyone is interested in doing some part time work for a UK company based near Rugby, please read on....

This could suit a (semi-) retired EE.

I work for a local University and have undertaken several projects to assist this SME using grant funding. The project has now come to an end.

Double sided PCB with a mixture of PTH & SMD components.
PCB will eventually need re-spinning to move it from prototype to production, and leverage improving supply chain conditions.
The PCB was designed using KiCAD V6.x and I am populating/debugging 6 off boards.

Hardware details:

Processor: RP2040 Dual ARM Cortex-M0+ @ 133MHz (RPi PICO-W module)

H/W & Comms Protocols:
I2C, SPI, RS232, RS485 Comms, UART based
SIM800L 2G GSM Module, simple SMS messaging, UART AT commands
WiFi 2.4GHz CYW43439

Knowledge/Appreciation of:
Solar Panel & Wind turbine technology
General understanding/appreciation.
Some RS232/485 comms may be required

Software can be written in C, Python etc.
IDE Micopython, Circuitpython, Arduino, Visual studio etec.

Hardware will be free issued for s/w development, once all modules have been tested/exercised using standard libs.

If you are interested please DM me directly, and I can supply more details.
If a suitable candidate applies, I will introduce you to the client company for you to negotiate your own rates/terms etc. I have no financial interest and am not a recruitment agency.

Regards,

Julian S.

Intel's Aedit running on MS-DOS was the best!
8" floppies, MCS-51 Dev system on wheels the size of a fridge.
And before that punched tape and cards!
You didn't run programs, you submitted them as a batch file overnight, to then find out you made a typo!
You "Younglings" are spoilt

@frobean said in Bed leveling has lost its mind:

@engikeneer That did the trick!
You can even see the spot where I have a tiny piece of plastic debris stuck under the flex plate in the height map

You should name your printer "Hubble"

http://www.spectrum-soft.com/index.shtm

This is now free as the owner has retired and is feeling benevolent.
It used to cost a few thousand $ and is not trivial.
Very powerful.

Enjoy.

The flex3drive hobbed gear is difficult to clean as it requires a strip down of the housing. Also the housing has split and delaminated.
Any more problems and it will be replaced with something else.
Not sure if upgraded/improved parts are available.

I once left it unused for some months and the OEM toothed belts became deformed at the pulleys - I now park it in differing places!
Friction prevents z creep.

Otherwise it’s a great machine.

KiCAD V6 !!!

https://www.kicad.org/

Hi,

Both those extruders look excellent.
I really like how they open up easily to clean the hobbed gears.
On my Flex3drive it's a complete strip down.

I'm a great fan of the Smart Effector built in Z Probe, it works for me.

When I loose patience (soon) with my current extruder I will look to implement either an Orbiter or Sherpa as a flying extruder.

Thanks for your recommendations Guys!

Plenty of ideas here:
https://www.thingiverse.com/search?q=orbiter+extruder&type=things&sort=relevant

Hi All,

I have a Kossel XL, SmartEffector etc and the Flex3Drive (early model) is wearing out.

https://flex3drive.com/product/g5-flex-for-duet-smart-effector/

Is it worth replacing with a newer one?
If so, what material SLS, SLA or FDM?

Or, can you recommend something else?

Thanks,
J.

@achrn Yes I was trying to debug my 2 wire PT100 circuit, hence the doubling up of the wires.

This was the culprit in the end......
Will recrimp at work tomorrow with the proper molex microfit tool.
Luckily I have a spare PT100

Hi,

I'm getting some PT100 temperature fluctuations with effector movement, so I'm suspecting the wiring on my smart effector. I have also stripped the screw terminals on the RTD board.

Couldn't locate a BOM in KiCAD files on github.

Q1: What is the part number for the Molex KK crimps used on the 8 way SIL connector on the Smart effector - I would like to replace the crimps in the cable harness to gold plated.

Q2: What is the part number for the 4 way screw terminal connector used on the RTD board

Many Thanks,

J.

That’s not a cooler.
THIS is a cooler

@dc42 said in Duet 3 EB 3HC intermittent CAN/boot? failure:

Sure, send it to me. I will investigate the problem and fit a new crystal if it needs one.

Hi Dave,

Thanks for the offer.
Can you PM your postal address please ?

skunkwerkzlabATgmailDOTcom

Regards,

Julian

Hi Dave & Max,

I have 4 off 3HC boards and one of them has been a bit of a CAN bus nuisance since day 1, but I have persevered.

The board in question has the same crystal markings as the photo above "120 020a"

Since a recent update (3.3.2 and various 3.3 betas) there is no longer any CAN bus activity RED led flashing, it is off all the time.
Now there is a small chance that I may have inadvertently messed up by trying to load the boot loader and consequently there is no LED activity.

so, I have ordered a ST-Link V2 and JST 1.5mm harness so will try to re-install the boot loader at the correct location.

I will report back later during the week.

@dc42:
Dave, if I am unsuccessful, may I return the board back to you for a quick check, happy to paypal you return postage ? Based in Coventry, not a million miles from you.
Or I am happy to re-solder a different batch# XTAL if you can advise or signpost me to Farnell RS etc.

Board was originally purchased by my client from Oozenest.

PCB is v1.0 with a central hole near the processor, orange sticker dot and label "DUET3 EB1 WD01117"

T
Thanks & Regards,

Julian.

This helped a little.
Pump on vibration damping mounts, fuel filter on intake.

Kossel XL+ Duet2 WiFi Firmare 3.2
CNC Test Bed 12 steppers Duet3 Firmware 3.2 RPi SBC
CNC Test Bed 12 steppers Duet3 spare/development Firmware 3.3 RPi SBC or standalone

Thanks for the update Dave.

Keen to try the 15 axes ! and report back.

Many thanks to you all for the crimp tool recommendations.

I will try the Japanese Engineer PA-21

Regards,

J.

Hi,

Is this crimp tool Engineer PA21 suitable for the Duet 3 5 way IO_n connectors, specifically the Molex and Wurth crimps

Crimp pins above:
Molex 08-50-range
https://uk.farnell.com/search?st=08-50

Wurth 61900113722DEC
https://uk.farnell.com/wurth-elektronik/61900113722dec/contact-2-54mm-crimp-awg28-22/dp/1841425?st=61900113722dec

I am aware not to mix Molex & Wurth products.

Or is the PA21 just for the larger 4 way JST Stepper connector ?
Can you recommend something suitable please (UK & cheap < £50) ?

Thanks.

J.

Hi,

I would like to see endstop status returned to DWC.
I have multiple steppers on a common rail moving in a co-ordinated fashion in convoy, nose to tail. Magnet & reed-switch on each end.

So a table of ALL endstops status was a great aid to debugging.

Thanks.

@dc42 said in RepRapFirmware road map Q1 2021:
"These are our current plans for RRF over the next few months:
....RRF 3.3: this is planned to be a short cycle. Work on it has already started....
....RRF 3.3 will also increase the maximum number of axes supported to 15,....
....I hope to have a release candidate available by the end of January....."

Thanks for all your hard work. This news is very welcome.

Regards,

Julian.