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Author Topic: Serenitiq 2 - Wacom Intuos 4 L + Rozsnyo DP2MBPR controller + LTN154YL01  (Read 85886 times)
Aerendraca
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« Reply #45 on: July 23, 2014, 09:57:22 AM »

No I haven't seriously started trying to minimise jitter yet, it was more a little test to see if providing power from the same source would make a difference. Perhaps it's too soon to judge as it may well help once I have build the case and applied some kind of shielding.

I can say that turning the LEDs down/off makes no difference to the jitter either, so it's definitely emanating from the panel itself. I'm not too worried about this at the moment, I think I will be able to minimize most of this once I get building properly.
« Last Edit: July 23, 2014, 10:18:31 AM by Aerendraca » Logged
Aerendraca
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« Reply #46 on: July 30, 2014, 08:43:01 PM »

So way back at the beginning of the Serenitiq2 build I said about how I wanted to create a contoured chassis, I showed a few pics of how I wanted it to look and then it all took a back burner while I awaited getting the screen.

Well I've been working on turning the contoured chassis into a reality and most of the build from now on will be focused on this. The design has been drawn up, the dimensions have all been calculated, materials have been chosen and in some cases purchased, and the concept is beginning to take shape.

As always, here's some pics of progress so far:


* Design 06 - Former Template 001.jpg (97.33 KB. 1844x904 - viewed 569 times.)

This is the form that I am building in order to create the curve required to contour to the Wacom I4 surface. This structure is a simple 9rib base that has been calculated to have the same curve as the Wacom I4. The edges extend down further to allow cutting back and cleaning up the cuts. The base is made from MDF, and bendy MDF also known as kerfed MDF - MDF that has slots cut across the width of one side to allow flexing.

Originally I had decided to send the drawings off to a company to get the form cnc machined but the quotes I received were really expensive, so I decided that I can undertake this task with as good a level of accuracy. I found a company on ebay that will cut MDF pieces to size and for a very cheap price (a little more than the cost of the MDF); they will be cutting cutting the basic shapes for me to the correct sizes, and then I will add the curve to the ribs.


* curve.jpg (147.57 KB. 1920x1080 - viewed 474 times.)

In order to make sure that the curve is the same on each rib I created a drawing of the outline of a rib in Sketchup and then transferred it to Inkscape via DWG file format. The idea here is that with this piece cut from 3mm MDF I can use it as a template to run my wood router bearing follower bit along, keeping all ribs exactly the same shape.


* WP_20140730_002.jpg (112.85 KB. 816x612 - viewed 417 times.)

I sent the file off to Razorlab and for around £10 (including P&P), with a turn around of 2 days(!!!), they sent me a physical rib template. Here you can see the MDF rib alongside the full scale paper print rib.

« Last Edit: July 30, 2014, 08:53:03 PM by Aerendraca » Logged
Aerendraca
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« Reply #47 on: July 30, 2014, 08:47:32 PM »

Here's just a few pictures that show that I got my maths right when working out the radius of curvature. FYI the radius of curvature for this I4 is (67.8+/-0.1)mm  in the event that anyone was wondering; I specify that this is the R.O.C for my I4 since manufacturing processing may vary this, but I would expect it to be the same if not similar on other I4 tablets.


* WP_20140730_004.jpg (112.49 KB. 816x612 - viewed 454 times.)



* WP_20140730_003.jpg (111.76 KB. 816x612 - viewed 469 times.)


As you can see the curve is perfect.

Next progress update is likely to be once I have built the form.

« Last Edit: August 01, 2014, 01:27:24 PM by Aerendraca » Logged
profaldo
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« Reply #48 on: July 31, 2014, 06:11:56 PM »

This looks beautiful man, just beautiful.

What are the ribs for?
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Aerendraca
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« Reply #49 on: July 31, 2014, 10:27:36 PM »

Cheers. The ribs are part of a template (or form) which will be used to bend and glue 5 thin layers of ply to make one thick curved piece - the contour.

I hope the final product works and looks how I have in my mind, at least the smoked eucalyptus veneer should give it a beautiful finish.

Just waiting for a few bits to be delivered before I can progress further.
« Last Edit: August 01, 2014, 01:30:13 PM by Aerendraca » Logged
profaldo
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« Reply #50 on: August 03, 2014, 11:35:02 AM »

This is very very interesting. I was planning to laser cut aluminum panels for my build, but now I have decided to wait and see how your build comes out Cheesy

By the way, there is a wireless touch pad / keyboard combo by some company called Lofree that I am planning on incorporating into by build (have to figure out how). Following is a video on YouTube, thought you might find some use for it in your build too:
https://www.youtube.com/watch?v=zSjBJgVohmw#t=228
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Aerendraca
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« Reply #51 on: August 05, 2014, 09:29:05 PM »

That Lofree MT-200 looks pretty sweet actually and it's really cheap! Makes me question the quality, but I might get one anyway at some point. I've put the controller idea on the back burner for the mean time while I build the case for the Serenitiq2, but I still have plans to revisit this in the future.

On that note, the cut MDF pieces have been received and I have been busy cutting the curves on the ribs of the form this afternoon, so all that remains now is to screw the parts together and attach the bendy MDF sheet.

Here's some pictures:


* MDF_Form_001.jpg (102.64 KB. 816x612 - viewed 457 times.)

The cut MDF pieces arrive!!!



* MDF_Form_002.jpg (121.43 KB. 816x612 - viewed 395 times.)

All laid out.



* MDF_Form_003.jpg (81.29 KB. 816x612 - viewed 422 times.)

The laser cut template fixed to one of the ribs ready for routing.



* MDF_Form_004.jpg (126.8 KB. 816x612 - viewed 405 times.)

The first routed rib; this rib will become the new template for the cutting of all the remaining ribs. The MDF piece that is clamped to the bench is just some scrap that I used to hold the rib while cutting.




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Aerendraca
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« Reply #52 on: August 05, 2014, 09:47:41 PM »


* MDF_Form_005.jpg (123.38 KB. 816x612 - viewed 436 times.)

The other 8 ribs rough cut ready for routing.



* MDF_Form_006.jpg (138.48 KB. 816x612 - viewed 393 times.)

All ribs routed and laid out ready for screwing together.


The keen eyed among you might notice that the ribs are considerably taller than I had modeled in sketchup, this was because the company that cut the pieces for me decided to make them 90mm tall instead of 30mm as per my specifications, however I didn't kick up to much of a fuss since the height makes no difference to the function of the form and I was excited to get building.

Oh, and since I'm on a roll with posting photos here's a couple of the plywood sheets:


* Ply_001.jpg (93.07 KB. 612x816 - viewed 392 times.)



* Ply_002.jpg (86.79 KB. 816x612 - viewed 435 times.)

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thp777
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« Reply #53 on: August 05, 2014, 11:32:11 PM »

IF you need help with controller i can probably help you out. I just posted one i built for mine in about 2 days and learned alot.
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Aerendraca
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« Reply #54 on: August 06, 2014, 01:15:04 PM »

Ahh yes, I think I might take you up on that offer. So you have a whole bunch of keys controlled with a Teensy, which serial to parallel chip did you use to build the switch array? Is it easy to change the function of the keys? have you implemented modifier keys too (shift/ctrl/alt etc)?
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thp777
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« Reply #55 on: August 07, 2014, 01:08:48 AM »

it doesnt use any chips other than the teensy. its a grid of rows and columns. all wired to different digital pins with diodes on the row connections from each switch. im using a firmware called tmk firmware. its fairly easy to configure. dont have a picture with me of it finished wiring but its pretty much just a wire from a pin on teensy board to one of the wire strands
 
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Aerendraca
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« Reply #56 on: August 07, 2014, 08:20:11 AM »

Ah yes of course because you can have 64keys with 16 I/O pins in an 8x8 array, any more and you'd need to start using a parallel to serial converter. I'll check out the tmk firmware, I think this is quite a viable option for me, cheers.

Also, is that an Arduino Leonardo Pro Micro and not a Teensy? Interesting. How did you load the Teensy firmware onto the Arduino? Don't they have different boot loaders?
« Last Edit: August 07, 2014, 10:41:50 AM by Aerendraca » Logged
thp777
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« Reply #57 on: August 07, 2014, 09:00:36 PM »

well theres a teensy in one half of my keypad and a pro micro in the other. i flashed the pro micro with a dfu bootloader that works with teensy and atmel flip software. i have it on all 4 of my pro micros.
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Aerendraca
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« Reply #58 on: August 07, 2014, 10:01:44 PM »

Nice, I didn't know you could do that. I have a pro micro somewhere I'll have to give it a go. Thanks for letting me know about this, it's definitely a possibility.
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thp777
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« Reply #59 on: August 07, 2014, 10:05:50 PM »

i used this guide for setting up the firmware. http://deskthority.net/workshop-f7/how-to-build-your-very-own-keyboard-firmware-t7177.html
Switches are cherry mx brown switches and for the wire i used 30 gauge single strand teflon coated and used solder to melt away coating at the connection points so its one singe wire for each row or colum and you dont have to worry about shorting.
« Last Edit: August 07, 2014, 10:09:43 PM by thp777 » Logged
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