Bongofish

Screen Tablet malarky => Tablet Conversion to USB => Topic started by: ArtC on June 23, 2011, 05:44:24 AM



Title: Converting Wacom UD-0608-R from Serial to USB
Post by: ArtC on June 23, 2011, 05:44:24 AM
Will try to convert my UD-0608-R board to USB

*** this mod is in progress, we will summary the mod after we are done ***


Title: UD-0608-R mod: internal interface
Post by: ArtC on June 23, 2011, 05:46:11 AM
Hey here are the images Bernard the realterm does not work on 64bit win and putty cant read the serial port maybe the virtual port is the reason ill figure it out somehow all it says is digitizer Ii and the voltage on the bottom I looked all over inside the only sticker i found inside was a barcode (sen-a091) this is below the sen number (6lwc03311) and one other (0070033) and one is (d160k6)

EDIT: Got Putty to find the version its version 1.4-4 thank you!! I am so excited those things look small though this may sound silly to you but where do I find an iron that small?......I have never soldered anything of that magnitude...and what type of solder? I already have some good no clean lead free flux and one last question the copper tape plugging very specific holes if some of the adhesive is coming off how do I put it back I am assuming those holes are covered with special tape for a reason?


Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 23, 2011, 09:33:51 AM
Here are two full board images one a little bigger than the other I think they are close but you would know way better than I....I tried to take the nasty light out of the one but photoshop is my tool and with it not working correctly right now i had to default to an inferior editing tool


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 23, 2011, 02:06:41 PM
Taking a photo of a PCB is really hard.  The best was to go in a very well lit area (like outside during the day) and not use any flash (difficult when doing this at night).


Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 23, 2011, 08:08:04 PM
Also difficult to do when you live in oregon....lol...its always real grey here I'll take some more.
The second one I thought had lots of detail as it is the biggest possible image I could upload. So one more outside I am on it!


Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 23, 2011, 10:51:55 PM
Ok much better image Bernard. Lower quality a little but much much bigger...PS Let me know if you see the ROM version there, I had to use a terminal emulator to find out what version it was, sorta like realterm but able to be used on 64bit windows. I did not realize how terrible those images were until I saaw this one.....Well learning thats good


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 24, 2011, 04:37:43 AM
Cloudy-grey is actually perfect for doing PCB shots (unless it rains! :D).  It is evenly diffused which is exactly what we want.

EDIT: Realterm works fine on my Windows 7, 64 bits.

What is SW101 at the top?  Is this a switch?

The 5V injection point is easy to find:  it is the "bottom" leg of the 5V regulator.   To make a test, you do not need to cut the leg. I cut the leg in the mod because I figured it is safer and probably more "valid" electronically. But it works perfectly without cutting -- at least good enough for a test.

For the serial signals, there is a good chance the same pin numbers do the same, but it is not necessarily true. They might have been shuffled. To ensure they are the same, we need to use a continuity tester. We need to do a little mapping of the pins from the DB9 connector going to a PC up to the MC145406 chip. This is the only way to be 100% sure of what we are doing.  In theory, it should resemble the mapping of the UD-1212-R, but this is a totally different board even if from the same series.

There is no sticker with a ROM version, this type of sticker is big (~1/2 inch square) and immediately visible. I do not know where the ROM is programmed exactly on that board  (maybe IC02).  It does not really matter now that we know your version is 1.4.


Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 24, 2011, 06:42:49 AM
Yes sir that is the on off switch for the tablet. so when I am testing I am looking for changes in the resistance when the tablet is receiving input correct? Also what is the range of resistance on something like this what range of ohms should my meter be on, and if you do not mind, just a quick little explanation of which pins I should be testing since the boards are entirely different and I have never worked with a circuit board like this, in the automotive industry we check for resistance range which changes the signal of a sensor and the like, such as when you press the accelerator pedal the resistance gets higher or lower which is how the computer tells what percentage of pedal that you are pressing and therefore knows what stage the throttle is in, is this how the pressure sensitivity works on the tablet? Also there are sensors such as the coolant temp sensor that has three wires one for power, one for ground and one is the signal wire that is 5v and the signal varies depending on the temp of the sensor, I am trying my best to learn here as electronics was one of the tougher things for me in my previous profession.   ???  One last question are you emulating the intuos when we flash the ROM on these?


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 24, 2011, 02:49:01 PM
lol  :) 

We are not testing while getting input and not really testing the "resistance" either (althought technically this is what a continuity tester does in a way).

It is much simpler than that.  :)

The only test I would want you to do now is to perform "continuity tests".  That is:  Between the pins of the MC145406 chip and the pins of the DB9 connector.  The DB9 connector is the serial port connector (9 pins) that is meant to connect to the computer -- the one at the end of the cable.  This has to be done while the board is not powered.  The way I do this is that I use a little bit of wire that I insert in one of the hole of the DB9 connector while knowing which pin number it is (DB9 connectors, often you have the pin number written on the connector, if not then just look at the markings on the PCB, you have a nice diagram with the pin number in the middle of the board! Thanks Wacom!  ;D). I attach one of the probe to that wire and then I slowly "scan" the pins on the chip to discover which one is connected to it (if any).  The most important ones are Pin 2 and Pin 3 but you have to look for the others as well.

http://forum.bongofish.co.uk/index.php?action=dlattach;topic=1930.0;attach=4436;image

In the end, we need to build what I call a "mapping table" -- or which pin is connected to which.  I did that for the UD-1212-R already. The hope is that the mapping is the same for the UD-0608-R.
I want you to build a "table" similar to the "Table 1" in the following post. (But not ALL the columns, just two columns:  the PC-DB9 column and the MC145406 - (RS side) column). And there is a good chance the numbers are going to be exactly the same.

http://forum.bongofish.co.uk/index.php?topic=1930.msg14217#msg14217

Pin numbers for your MC145406:
[attachment=1]


A Continuity Tester often has a "beeper" associated with it, so if you touch the probes to connect them, it beeps.

Emulation: We are not going to flash the "ROM" of the UD-0608-R board (we do not have tools to do that anyways). We are going to flash the ROM on the Teensy and the "teensy" is going to be turned into one of the USB tablet. The one that is being emulated is an Intuos2 12x18 (XD-1218-U) (We can also do a Graphire 3, but that one is too small and is missing features like tilt).



Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 24, 2011, 08:56:19 PM
Ok well continuity thats an easy one there....... :)  Next up will it be necessary for me to get a new pen in order for the board to work correctly, an Intuos pen? I have several of the original pens but not sure if they will work here.


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 24, 2011, 11:57:41 PM
The original pen or any one that works with this UD board is fine -- nothing changes here -- any of the penabled or ultrapad pen should work like before. You have to understand that we are not really changing the nature of the board -- we are only "interfacing" it (talking to it) on one side and then emulating a USB device on the other side.  This board will not "really" become an intuos! :) (just faking it)



Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 25, 2011, 09:35:15 AM
Here is the pinout from the MC145406 I believe it is the same, but I may have missed something. One final question, now this probably makes no sense and I do understand we are only pretending to be another device but does the size matter? As my board is smaller than the 12X18 obviously and did not know if that made a difference.......Probably not and its quite a relief I can use the old pen, way back when I got these boards they were very very good boards and its nice to know that they aren't just trash now that Wacom has disowned them! Now, just so you know where it says VSS and GND on the MC145406 I connected one end of my meter to the pin and then the other to the ground plane and got my beep obviously but with the VSS I touched the other lead to an area just north on the board where I saw a plus sign and assumed there must be power coming in or out there, I am not the best with this so please be patient with my slower than normal comprehension....Thanks you've been great Bernard!   :)
P.S.  This is also assuming that you are looking at the female end of the serial connector as if you were the male side, just to clarify not sure if that's how it should have been read an obviously I matched the written info off the PCB to come to my conclusions and the MC145406 is placed there exactly as it is on the board, writing is oriented the way I looked down at it from above.
P.S.S. Got my Teensy today!!! Pretty nice to live only twenty miles from them, it was mailed yesterday by regular mail!!   8)


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 25, 2011, 03:21:50 PM
OK -- The markings on the PCB uses the Serial signal names seen in reverse.  (All Wacom boards I have seen do that: as if the Wacom board was the computer and the computer the "slave" peripheral!). But yes, the numbers matches exactly with the UD-1212-R -- so we can proceed with the same mod! :)

What we've done here is check which signal is connected where -- we checked the "RS" side (as in RS-232). Now the Teensy connects on the TTL side. So I will copy here the Table 2 from the other thread:

 


Table 2

Summarizes the modification: (NOTE: serial signal names is reversed from the markings on the PCB)

                    MC145406 (removed)
Teensy      Board   Dir TTL side   signal
--------    ------  --- ---------- ------
D2 (RXD)            <-- 10         (RXD)
D3 (TXD)            --> 11         (TXD)
GND         Ground
            N.C.    <-- 12         (CTS)
            Ground  --> 13         (RTS)
            Ground  --> 15         (DTR)
            N.C.    <-- 14         (DSR)

VCC         voltage regulator "bottom" leg




So you can read the UD-1212-R thread mod and go forward! It is the same stuff:  Connect the GND (to one of Teensy GND), Cut leg of voltage regulator, connect the 5v (one of Teensy VCC) -- test the board -- remove the MC145406 -- test the board again -- then connect pin 13 and 15 to the ground plane (make sure you leave 12 and 14 unconnected)-- then connect 10/11 to Teensy D2/D3. Run the waxbee config tool, flash the teensy. Yippee!

NOTE: carefully plan on the wire length and your final teensy position -- put a little more wire than necessary, it is easier to fold wires than extending it. Make sure there is no stress on the "pads" of the PCB. Maybe you could glue or tape the wire on the PCB(?). Be creative. Don't make the wire go accross the active area (and not even close, the sensing goes a little beyond, you can see the vertical and horizontal traces on the PCB).


Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 25, 2011, 08:15:11 PM
Ok so going to get busy on this, and since everything is the same on this board that is a good thing....I will post some pictures when I am done, I think it may be a little more difficult to position the Teensy in this one because the switch is a very small switch I could possibly place it where the current serial out connection is, I can remove that right?


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 25, 2011, 08:29:40 PM
yes, no longer need the serial cable nor its connector for that matter.  The main switch I do not know how it is connected, but I suspect it will no longer have any effect either.  I removed it on the UD-1212-R to remove any potential "confusion".

You can opt to leave the Teensy completely outside and attach it with tie-wrap(s) -- or use the unusued Teensy GPIO pins as screw holes (just make sure the screws does not make electrical contact with something else). You can cut the case to fit it somehow? I do not have your tablet case in my hand to help out here.   

You are going to need a bit of that DIY spirit! :) Be creative!  Can't wait to see what you will come up with  ;D



Title: Re: UD-0608-R mod: internal interface
Post by: ArtC on June 26, 2011, 03:21:21 AM
So Bernard I am just at the stage where I test the power connetion, no smoke but the light on my wacom is not lighting up
I may have messed up the connections on the Teensy I had a very hard time attaching the ground to the teensy itself, but i thought.......shoot I dont know maybe the ground is in the wrong spot but then i htought I wouldf get smoke...lol or something else I think i may know what happened I may have messe up a transistor on the wacom board where the MC145406 is I tried to solder into what I thought was a pad  I hope you tell me I did not screw up cause Iif I didnt then I think I may just need a new Teensy instead of xperimenting with another one of my tablets


Title: Re: UD-0608-R mod: internal interface
Post by: bernard on June 26, 2011, 05:22:47 AM
I do not have this board in my hands, so I do not know about this location. My little finger tells me it might be fine since it is probably a part for the MC145406 which we will remove later one anyways.

You have problem soldering a wire in the big holes on the teensy?  It is quite easy I find(?)  Wrong hole on the Teensy? For ground, look for one of the hole labelled "GND".  Can't miss it!  I did a little diagram with colors of the Teensy in the UD-1212-R thread.  Look for it to find the good holes.

The power (VCC on Teensy) goes to the 5V Voltage Regulator  TA7805F (IC102) -- It is a little square device with 2 legs.   The leg is actually right under the letter "r" of the word "Soldered" in your last photo!

The ground (GND on Teensy) goes anywhere you have a ground plane -- (anywhere that connects to TP106 I think).  You could even solder the GND to the voltage regulator TA7805F (IC102) "back" connection.  It's on the "right" of the package -- I mean it is not the legs, but on the other side, where there is a big piece of metal there. In your picture, it is very close to the "I" AFTER the word "soldered" (last in the first line).

So first thing:  Get a GND and VCC soldered to the voltage regulator.  Connect the teensy and see if you see the led lit. Do not leave it plugged too long if not working, unplug quickly.  If there is a short, your PC will reboot.  Take a picture of the work.

One thing you could try is to simply connect the teensy and measure the DC Voltage between GND and VCC -- you should read 5V.  Also use the continuity tester to check on the soldering before powering it up.  The GND should connect any of the little holes of the ground "plane" as well as TP106.

EDIT: I just tried soldering a ground (on another board, a GD-0912-R) to that voltage regulator without luck!  It was far easier to find another spot on the board -- It was one of the pin on the white connector.

http://forum.bongofish.co.uk/index.php?topic=1927.0


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: ArtC on June 27, 2011, 06:35:27 AM
well it looks like i messed up the teensy there is not 5v coming from the teensy and what happened was my first solder connection of the power went beautifully then the grnd is what gave me a problem and when i messed the ground up too much pressure was put on the power and it broke thus i ended up burning the board trying to fix it now i think i am really screwed cause i dunno how to get the other solder joints off without messing up the board........ sad panda      :-[


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on June 27, 2011, 02:19:09 PM
To take off solder (if you made a bridge) you could try to use a "solder wick-style" technique (if you do not have a wick). Put clean/bare wire(s) on top of the soldering and heat. A little bit of solder should stick to the wire. Move the wire a little bit further, eventually all solder will be on the wire and none on the board. Takes time, but it should work.  I have a pump to do this type of stuff. 

A wick is just lots of small wires meshed together. A bunch of tiny wires is the best for this -- sometimes you can get those from multi-stranded wires. (like for speaker wire or lots of other flexible electrical wires).


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on June 27, 2011, 03:52:27 PM
"burn the board"? How do you know it is burnt?  This is because you see no 5V coming out?  Is the tablet still connected?  

 Can you post a picture?

The AVR chip (which is about the only thing on the Teensy) can be surprisingly lenient. (of course it can be burnt like anything, but still).

So the next step is to check that the Teensy is really burnt. Disconnect/cut all wires going to the tablet. Remove all solder bridges, inspect carefully the board, clean it up.  Use your multimeter to check that there is no solder bridge or anything that might look suspicious.

Now, try to power it and quickly check if you get a 5V reading.  Also check if the Teensy is seen by windows. (device manager or a USB tool like usbview or usb trace, etc.).  Of course if you suspect anything weird, disconnect quickly.


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: ArtC on June 27, 2011, 07:14:38 PM
I will get a picture up for you the only thing I burnt were the holes where the voltage and ground are the board itself is fine but now I have no where to get my voltage for the wacom from


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on June 27, 2011, 08:17:43 PM
On the Teensy, there are two GND holes and two VCC holes -- you destroyed both?  :o

You can get the 5V from the big pad in the back near where it says "5V" and also the "middle" one. Also there's an even bigger pad next to it, where the 3.3v voltage regulator would normally go).  Just look at the trace to know which one I am talking about. Also you can use the multimeter (continuity test I mean) to be sure.  You can also hook directly to the USB wire 5V -- it is all connected.  There are other spots on the board (Like there are 5 1uf capacitor connected to VCC, but these are tiny and then you run the risk of unsoldering them).

Teensy Schematics:
http://pjrc.com/teensy/schematic.html

Trick to solder to a pad:  

1- Fill the pad with solder. (no wire here, just the pad alone)
2- Put solder on the wire. (separately)
3- Then hold the wire on the pad and just apply heat.

This will essentially "re-heat" the solder and make one big solder blob. Jobs done!

If your iron is very hot, it will eventually lift the pads. So if this is your case, do not leave the iron for "too long". I know this is pretty vague timing description, but I have nothing better to say. :) The trick above will help on that regard, it should be quick.

Another trick:  Often the pads (or wire) are not accepting the solder right away and/or it appears to be difficult to transfer the heat to the pad/wire. Flux would be the answer for this, but I suppose you do not have a bottle of flux around. One way to transfer "heat" is to use solder itself (since it is in a liquid form) -- and always use "fresh" solder since it contains a bit of flux in its core (flux eventually goes away after heating).  So put new solder on the iron and touch the pad with the solder to make a better contact than your "solid" iron.  DISCLAIMER: everybody will tell you to heat the metal not the solder. But this is a case where the metal or the iron is not making good contact and we just want to jumpstart the soldering and make a better heat transfer. Once you did that once to the metal it becomes "easier" to solder.

Another thing: Also it is good if you can have a wet soft "pad" (like a sponge) where you can cleanup your iron tip. The water will avoid the burning of the pad/sponge (do not hold with your fingers!).


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: ArtC on June 28, 2011, 04:16:50 AM
Sweet!! I only messed up one set of power and gnd the ones at the very bottom of the board by the reset button i think! That is such good news I am going to get her fixe then YAY thank you for telling me that! Woot!!


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on January 11, 2012, 10:56:32 PM
Hi Artc,

I had a lot more questions before I re-read this whole thread and figured I can follow the ud1212-R one. However, (if you are still tuned in, how did you fare on this build and did you take any photos of the final result? I have the same board and I am getting fired up about doing mine. :)


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: teachP on January 16, 2012, 08:55:36 PM
Hi all,

I finished my own pad and here are the photo's:
From the outside:
[attachment=1]

The wires:
[attachment=2]
[attachment=3]

And the placing of the teensy in the upperleft corner.
Note: wrap the teensy in plastic (not shown) to prevent shortcuts
[attachment=4]

I had to slice a little bit from the USB cable and removed some lips from the top cover. I also removed the serial connector to make room for the teensy.

To finish the mod, my template:
[attachment=5]


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on December 04, 2012, 02:23:18 PM
Looking back at the above wiring, I did not analyze it, but it seems it is re-using some other routes to bring the teensy signal. The teensy wires are soldered to big CheckPoints (CP) pads and then some pins are being bridged near the chip.  This sounds valid (especially if it works!!) :) I just want to say that this wiring is different than mine -- do not get confused by thinking it is the same.

Nice work!


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 04, 2012, 07:21:07 PM
Yes, having looked at this a bit more it seems like he used pin 9 which is ground to ground pin 13 and for 15 he's found another point to ground it.

What was confusing me was the joining of 6 to 11 and 7 to 10 but then I realised that this was in order to pass those signals on to the pinouts for the serial socket which is kind of neat because that's where the Teensy is going to be situated anyway.


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 08, 2012, 03:06:31 PM
Well I royally screwed up! All the pads on  one side came off. Murphy's law being what it is, it's on the wrong side. Not sure if I can recover from that.  :'(


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 09, 2012, 02:05:11 AM
Well that was a horrifying experience. The soldering was a nightmare with my eyes and the size of those tracks. The soldering is not that good but I dare not touch those wires again, I had a devil of a job getting the solder on to those vias and I had to cut down the strands to 2 just to stop the solder going ott. I manage to scrape one of the tracks and get the blob of solder to ground the two pins that needed it.

Wired it up in the test config you see here, flashed the rom, (light doesn't blink but the hid listener showed pen working fine), loaded the drivers and bingo.

Some pics of the test setup.
(http://imageshack.us/a/img547/1509/dsc2698sm.jpg)
(http://imageshack.us/a/img528/5234/dsc2701sm.jpg)


I've found a neat way of modifying the case so the teensy will fit in under the board in the corner, the upside is it will allow me to plug the usb cable in without taking the board apart. I'll post some pics when I'm done.

A big thank you Bernard and everyone else that's posted their conversions .. so pleased to have my Wacom with a new lease of life. 8)



Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 09, 2012, 04:09:20 AM
Here are the final images. After removing some of the top lid's obstructions in that area I found that the bottom lid had a natural piece 'L' shaped plastic that just happens to butt right up to the back of the usb socket thus keeping it firmly in the corner. It did also make it necessary to completely remove the serial socket but that was easy enough/

There is no movement so I'm happy to leave it like this for the moment. I may just cover the exposed square with something but for now it seems pretty good

(http://imageshack.us/a/img521/5641/06081.jpg)
(http://imageshack.us/a/img507/9760/06082p.jpg)
(http://imageshack.us/a/img546/2820/06083.jpg)


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on December 09, 2012, 04:20:58 AM
Neat Teensy placement!

How did you made sure the teensy is not touching the wacom board?  (On one of the last picture, the boards appear to be overlapping.)

Another idea is to make a hole to expose the Teensy reset button in case you want to upgrade to a new WaxBee firmware without opening the case. Just drill small round hole, then you can use a non-conductive thingy (like a pencil eraser or whatnot) to press it when required.


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 09, 2012, 07:10:49 AM
Yes it overlaps but in fact the wacom board is designed to be suspended a few mm above the base and what's great is it is enough for the Teensy to sit at the bottom without touching anything.

Yes on the last picture that ugly eliptical hole is the reset hole I drilled. It's not circular because I made a little mistake. :)

Now I've had a play the only thing that is not quite right is the pressure sensing which is erratic. eg. It jumps around (jitters) as I press harder and if I push too hard I will read a light pressure as though there's some wrap-around happening.

Tweaking the setting in the driver can make it a bit better but it's not too good. Do you have any suggestions ?


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on December 09, 2012, 04:05:43 PM
Hum. Try to tune the pen.  There are potentiometer(s) in there.  I do not remember for your specific pen, but typically it is under  the button cap.  There is a way to remove it without breaking it. I broke mine because I did not know how to open it.  Here's the note about it (if that can be of any help). http://forum.bongofish.co.uk/index.php?topic=1514.msg10063#msg10063   You can try searching elsewhere if you have issues opening yours.

Look at this post for more info: http://forum.bongofish.co.uk/index.php?topic=1930.msg15097#msg15097

Do you have an eraser?  Do you have the same issue when using the eraser?  The eraser is often a separate circuit (depends on the model).


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 09, 2012, 10:55:33 PM
Ill take a look at those links.

Yes the pen does have an eraser.
The first thing I noticed when first plugging in the tablet is that the light doesn't turn green until it's pressed pretty hard then it seems to flash intermittently sometimes very quick succession of flashes. As I keep doing this, over time  it becomes a little more stable, such that I get a steady light when pressing (perhaps just a few flickers now and then).

When using the eraser the green light comes on and is steady well before the pen touches the tablet. It stays green regardless of pressing until it's moved out of range.

I thought this might be something to do with the drivers as the pen didn't have this behavior before.

Edit:

Ok looking at my pen, it also has a crack very similar to the one shown in your picture. I'm not sure when that happened. When extracting the board, button 2 seems to have fallen apart into several bits. I might have to lose that as I don't see how they'd go back without some sort of glue. I'll see if I can get an new pen from ebay. If not will any of the newer pens work ok. I'm assuming they should all work ok with any pad but may be wrong.


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on December 09, 2012, 11:36:35 PM
If the eraser appears good that really points to a mis-tuned pen. OR a faulty pressure, but the way you describe it, I doubt it. Play with the little pot on the main circuit.


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: louiscar on December 10, 2012, 12:31:45 AM
ok will do. I'm trying to put the button back together, it seems to have got bent a bit but I've managed to assemble it and going to try some glue. I can then play with the pots.

I have 3 pots. I take it that the middle one is the pot I should play with as I guess the outer two are just for button sensitivity.

(http://img805.imageshack.us/img805/4334/0608pen.jpg)

I've lost the springy-ness on the tip for some reason, I can't see why but the pressure sensor seems to register ok.


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: masterrey on January 20, 2013, 10:51:46 PM
Hi. i'm new user. I made the conversion on this tablet successfully.
here is the images of this work.


(http://imageshack.us/scaled/thumb/580/img3559aj.jpg) (http://imageshack.us/photo/my-images/580/img3559aj.jpg/)
(http://imageshack.us/scaled/thumb/13/img3557bg.jpg) (http://imageshack.us/photo/my-images/13/img3557bg.jpg/)


Title: Re: Converting Wacom UD-0608-R from Serial to USB
Post by: bernard on January 21, 2013, 02:28:38 AM
The pen tip never had any "spring" effect, at least none that we can sense. (but the eraser do). It is a totally different pressure system.

@masterrey  : Great stuff!