[vroemm]

Here you can find the partslist for the UHU http://gsst.wikispaces.com/UHUget
Questions or improvements can be discussed in this thread.

[rtfm]

Anyone still selling parts kits for the UHU Servo Board?

[kreutz]

Here are the latest Schematics including modifications

Attachment 483080

[Andrey67]

Is it possible to use inductor PM2120-2R2M-RC insted of PM2120-1R2M-RC on UHU HP (L1,L2)?

[kreutz]

Is it possible to use inductor PM2120-2R2M-RC insted of PM2120-1R2M-RC on UHU HP (L1,L2)?

No, it is almost double (2.2uH) the inductance of the right one (1.2 uH), also the saturation current is lower (19 Amps)...

[kreutz]

Hello

Make sure to review the LATEST parts list and be sure you can get all the components listed, before ordering pcbs from your fab. I don't work with Altium software anymore and it will be time consuming doing further modifications to this design.

Regards

kreutz

[jcdammeyer]

Out of curiosity what are you using now for schematic and PCB layout
Cheers
John

[kreutz]

Here is the compressed Gerber folder. The HP-UHU pcb is marked Rev 1.0b, it requires modifications as per posted in the HP UHU thread.

[Andrey67]

To clarify the value of the following components C14 and C18 (tantalum or electrolytic)?
What are jamper's (RST1 and P3) on PCB's for and if it's necessary to install (to short-circuit) them?

[kreutz]

To clarify the value of the following components C14 and C18 (tantalum or electrolytic)?
What are jamper's (RST1 and P3) on PCB's for and if it's necessary to install (to short-circuit) them?

For HP_UHU only: C14 and C18 could be tantalum capacitors. RST1 is a reset jumper and should be normally open (briefly closed for hardware RESET). P3 is a test point for GND potential, it is permanently shorted on the PCB by a thick copper trace. P3 serves as a test point GND for the oscilloscope, and as a auto-router trick to separate Power and Logic GND while auto-routing the PCB.

Regards,

Kreutz.

[jcdammeyer]

Hi,
I've finally gotten around to assembly of the first HP-UHU and have made up some sheets with colour coding for easily locating where all the parts go. Once the first board is up, I'll scan them and post to make it easier for everyone else (and me for the other 3 boards).

There are a couple of problems though. I've downloaded several zips with component layouts. On one, the PCB is marked Rev 0.10b while the green Rev00c 08/2007 component layout doesn't match the board. Instead I've been using the monochrome Rev 1.00 12/2007. However, it's missing R46 right by J7.

Next, the component list has C21 etc. listed as using a 5.1X3.2 footprint but in fact the caps on the board are on 0.1" spacing. What is the part # (or is there one) of the 0.22uFd MKT capacitor that fits this?

Any chance that an up to date version of the component overlay for the PCB marked 0.10b can be posted. Then I can transfer my coloured marks and labels it it along with Digikey and Newark part #'s.

Thanks
John Dammeyer

[kreutz]

Hi,
I've finally gotten around to assembly of the first HP-UHU and have made up some sheets with colour coding for easily locating where all the parts go. Once the first board is up, I'll scan them and post to make it easier for everyone else (and me for the other 3 boards).

There are a couple of problems though. I've downloaded several zips with component layouts. On one, the PCB is marked Rev 0.10b while the green Rev00c 08/2007 component layout doesn't match the board. Instead I've been using the monochrome Rev 1.00 12/2007. However, it's missing R46 right by J7.

Next, the component list has C21 etc. listed as using a 5.1X3.2 footprint but in fact the caps on the board are on 0.1" spacing. What is the part # (or is there one) of the 0.22uFd MKT capacitor that fits this?

Any chance that an up to date version of the component overlay for the PCB marked 0.10b can be posted. Then I can transfer my coloured marks and labels it it along with Digikey and Newark part #'s.

Thanks
John Dammeyer

Here is the component layout, later I will look around for the capacitor's part number.

Regards,

Kreutz.

[jcdammeyer]

Here is the component layout, later I will look around for the capacitor's part number.

Regards,

Kreutz.

Thanks. BTW, I have installed the 2200pF caps on the differential encoder SN75115 interface. I will investigate this O error problem.

John

[kreutz]

I lost track of how many crashes I had when using win 7, actually not always the O.S. fault, the hard drives failed or got corrupted suddenly. I was confident on using a NAS as a backup for the files and the whole disks but the NAS also suddenly lost 2 drives and everything went out the drain. Then I've upgraded to to Win 10,, since I lost the licenses for many old applications during the crashes, and they recently went for the "pay annually" theme, I decided to stop personal development at home. The only info I successfully rescued was the old designs from the early 2000's which I backed up using USB drives.
I don't trust the cloud for backup because my internet connection is really slow over a DSL line, I live in the countryside and there is no interest from my provider to upgrade the lines.

[kreutz]

The company, I was lately part time designing for, use Cadence Orcad. My own PC has crashed so many times without backups that I don't own a copy of either of them (Altium or Orcad), for personal use, anymore.

Regards,

kreutz

[kreutz]

Capacitor: http://parts.digikey.com/1/parts/843...014d0224k.html

[jcdammeyer]

Capacitor: http://parts.digikey.com/1/parts/843...014d0224k.html

Hi,

So you are saying just take the 0.2" (5.08mm) spacing part and bend the leads inwards to fit into the 0.1" (2.56mm) spaced holes? Kinda figured this was a layout error. ;-)

Curious as to why the component list has the footprint as 5mm.

John

[kreutz]

Hi,

So you are saying just take the 0.2" (5.08mm) spacing part and bend the leads inwards to fit into the 0.1" (2.56mm) spaced holes? Kinda figured this was a layout error. ;-)

Curious as to why the component list has the footprint as 5mm.

John

The component was listed as 5.08 mm on my Altium DXP2004 library but the footprint was wrong. Will be corrected on the next revision of the pcb (not scheduled yet)...

[jcdammeyer]

The component was listed as 5.08 mm on my Altium DXP2004 library but the footprint was wrong. Will be corrected on the next revision of the pcb (not scheduled yet)...

I got caught that way once with 4N33s. In that case the pins were wrong on the schematic object and so the layout was wrong. Expensive mistake.

Here's a picture of progress so far. Just needs LEDs, ICs in sockets, 470pF, 1uFd 250V on bottom along with transistors and voltage regulator. Already the circuit boards weighs an extra 150 grams.

Now to make a list of what parts are missing for the rest of the boards.

Looking forward to trying it out.

John

[kreutz]

I got caught that way once with 4N33s. In that case the pins were wrong on the schematic object and so the layout was wrong. Expensive mistake.

Here's a picture of progress so far. Just needs LEDs, ICs in sockets, 470pF, 1uFd 250V on bottom along with transistors and voltage regulator. Already the circuit boards weighs an extra 150 grams.

Now to make a list of what parts are missing for the rest of the boards.

Looking forward to trying it out.

John

Looking really good so far...

Kreutz.