D-Bot 3D Printer

[tekkydave]

10 hours ago, Gina said:

Yes, that piezoelectric device looks pretty good.  Makes for a neater machine than my conductive sensors and copper film pads where the test points are for auto bed levelling.

It's a great idea. The x & y offsets are 0 and z is usually set to 0.1 - 0.2.

I haven't got it working yet within the printer so watch this space 

[Gina]

Ah yes - proof of the pudding and all that...

[Stub Mandrel]

12 hours ago, Gina said:

To avoid filament jamming in the heatsink, make sure the cooling fan is running until the filament cools well below 100C or lower for some filaments with low melting point.

The problem is usually me trying to pull filament out when it isn't hot enough...

[Gina]

Ah yes...  Patience is a virtue...

[tekkydave]

Patience is a virtue.

Practice if you can.

Seldom found in Woman.

And never found in Man.

 

[Gina]

That's it

[Dave_D]

On 12/6/2017 at 19:36, tekkydave said:

Mine arrived last week but it was 'spirited away' to be wrapped in Xmas paper

 

aaaaaannnnnddddd... i have printing  Dave, you're gonna love this board. it's whisper quiet...

[Gina]

Yippee!

[Chriske]

 

[Dave_D]

this is how quiet... tablet was 10 inches away

 

Edited December 10, 2017 by Dave_D

[Gina]

Been thinking about the Duet WiFi but it certainly isn't cheap at the best part of £150 when you add carriage and VAT.  Looks very good though - everything in one unit I gather, effectively replacing Arduino Mega, RAMPS and RPi it would seem.  I like that - cuts down on connections giving higher reliability.  If I were to get one (or two ) I could use the redundant Mega and RAMPS to drive my weather station analogue wall display.  Selling my redundant astro gear may provide funds

[tekkydave]

Replaced the left hand pot on the pcb with a multiturn to make calibration easier. Also the piezo seems to have reverse polarisation so I flipped the connector on the rear and it works great now. I needed to switch to dual z stepper drivers to get the homing speed up to around 400mm/min to trigger it reliably.

Homing on Youtube

 

Edited December 11, 2017 by tekkydave

[Gina]

mp4 link not working   Not sure I would be happy bashing the nozzle tip onto the bed.  I can see why you want to make your machine quieter Dave.

[tekkydave]

Removed the link - shouldn't have been there.

It doesn't really bash into the bed, it just touches lightly. It sounds like it is but the noise is from the motors stopping.

This printer is quite noisy I suppose. I think the motors I'm using are a bit under-powered. they originally came from my old Prusa.

[Gina]

Ah yes, that could be the problem - I am using more powerful (longer) NEMA 17s in my Titan printer.  The ones in the Pilot aren't the smallest either.

[tekkydave]

Results of M48 repeatability test:

SENDING:M48 P5 X150 Y140 V4
M48 Z-Probe Repeatability Test
Positioning the probe...
Bed X: 150.000 Y: 140.000 Z: 0.031
1 of 5: z: 0.002 mean: 0.0019 sigma: 0.000000 min: 0.002 max: 0.002 range: 0.000
2 of 5: z: 0.007 mean: 0.0044 sigma: 0.002500 min: 0.002 max: 0.007 range: 0.005
3 of 5: z: 0.004 mean: 0.0044 sigma: 0.002041 min: 0.002 max: 0.007 range: 0.005
4 of 5: z: -0.005 mean: 0.0020 sigma: 0.004428 min: -0.005 max: 0.007 range: 0.012
5 of 5: z: 0.008 mean: 0.0031 sigma: 0.004524 min: -0.005 max: 0.008 range: 0.013
Finished!
Mean: 0.003125 Min: -0.005 Max: 0.008 Range: 0.013
Standard Deviation: 0.004524

[tekkydave]

2 minutes ago, Gina said:

Ah yes, that could be the problem - I am using more powerful (longer) NEMA 17s in my Titan printer.  The ones in the Pilot aren't the smallest either.

I've adjusted the speed, acceleration and jerk settings in Marlin and it's a lot quieter

 

[tekkydave]

Santa delivered 

[Gina]

I shall be very interested to read about how you get on with this new super-duper control board Dave   My Titan printer come do with quieting down - at least while it's in the living room   Unfortunately, 3D printer upgrades are on hold while I work on my ASC and weather station.  Functionally, my Titan printer is working well and my main "work horse"

Edited December 26, 2017 by Gina

[Dave_D]

7 hours ago, tekkydave said:

Santa delivered 

bask in the total wonderfulness of the duet wifi

dunno if this is of any interest but i'm just finishing off a duet wifi/mosfet modular box linked together with 14.5mm non-split flexible conduit for cable routing. you can have the file if you want it

 

[tekkydave]

That looks good. Why not post it on Thingiverse - lots of people would find it useful.

I was planning to make a case with a fan beneath the pcb where duet recommend the cooling is applied.

[tekkydave]

I'm also planning to upgrade to 3 leadscrews linked by belts with a single motor. I have all the parts. I will have to rearrange/add to the cross 2020s in the base which will affect how I eventually lay out the electronics.

[Gina]

 I think that's a good idea

[Dave_D]

6 hours ago, tekkydave said:

That looks good. Why not post it on Thingiverse - lots of people would find it useful.

I was planning to make a case with a fan beneath the pcb where duet recommend the cooling is applied.

the outlets are at the back of the mobo and i'm using positive pressure to force the air out the back and upwards away from the print area

[tekkydave]

Got a stinking cold at the moment so a good excuse to lock myself away with the Duet.

Yesterday I set up the WiFi connection and basic configuration. Today has been mostly crimping.

The basic axis motion is working well and I'm amazed how quiet it is. I thought others were exaggerating about this but its true.

I need to get the piezo z probe configured before I can try a print. A job for tomorrow...