Noob building a TF534

TF534 - 68030 + More RAM Board (More compatible with amiga hardware)

Moderators: terriblefire, Terriblefire Moderator

Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

I bought a cheap tiny CNC router to make my own little PCBs for video amps and stuff like that. I have a large 2m long homemade CNC for big work like furniture, but wanted something I could have next to my PC desk to make PCBs and not have to wait weeks for board from china. Today I decided to see if I could tune the CAM to reliably cut tracks for the same CPLD as used on the TF534 and turns out it's possible on this cheap machine even with cheap V-engraving bits. I don't have the files to try to make a full card but at least it's possible. It would be very cool to CNC a TF536 PCB at home.

The square in the photo is 20x20 mm with 0,5 mm pitch. Drag tinning the tracks with flux was no problem.
CPLD.jpg
CPLD.jpg (49.2 KiB) Viewed 3594 times
I also tried tighter 0,4 mm pitch but that was too small.

This is the machine I bought. Not great, but works better than I expected after careful tramming. IT was much cheaper than buying the rails and motors I needed to design my own from scratch. I had to replace some screws which were too long under the bed. It's pretty quiet:
https://www.ebay.com/itm/CNC1810-Mini-L ... 2032963932

This is the kind of PCBc I bought the machine to make:
minicnc02.jpg
minicnc02.jpg (55.71 KiB) Viewed 3583 times
I also tested milling the backside of an acrylic piece and filling the pockets with paint:
minicnc01.jpg
minicnc01.jpg (41.3 KiB) Viewed 3583 times
It will even mill brass, albeit slowly:
minicnc03.jpg
minicnc03.jpg (53.75 KiB) Viewed 3583 times
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

I'm pushing it here, but it's able to make 0,25 mm tracks and even double tracks between 2,54mm pitch holes. I simulated a 030 socket grid on the right and a 0,5mm pitch CPLD on the left (drawn in CAD). Ball point pen tip for scale.
minicnc04.jpg
minicnc04.jpg (134.82 KiB) Viewed 3563 times
User avatar
8 Bit Dreams
Moderator Team
Moderator Team
Posts: 785
Joined: Fri Nov 09, 2018 7:12 am
Location: Germany

Re: Noob building a TF534

Post by 8 Bit Dreams »

Just to remind You,
All TF boards are four layer 🤔
Retro computer hardware & repair in Germany
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

I was wondering about that as all the vias seem to go from top to bottom but four layers are clearly visible around the edges.

It's cool anyway. I can make my own CPU relocators and all kinds of stuff in hours now instead of waiting for China.
User avatar
PhilC
Moderator
Moderator
Posts: 5984
Joined: Fri Mar 23, 2018 8:22 pm

Re: Noob building a TF534

Post by PhilC »

Looks good @Lynxman , which router did you buy?
If it ain't broke, test it to Destruction.
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

This cheap thing: https://www.ebay.com/itm/CNC1810-Mini-L ... 2032963932

I wanted 100x150 mm area and this is the cheapest I found.

Here's a through hole circuit board I milled yesterday:
minicnc05.jpg
minicnc05.jpg (136.1 KiB) Viewed 3555 times
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

My new TF534 works in the A2000.

Running at 33 MHz. It's a 33 MHz CPU and I think that's more than enough. My giant 32" CRT.
TF534-07.jpg
TF534-07.jpg (105.85 KiB) Viewed 3526 times
I need to fabricate a support for it so that it doesn't flop around when moved. I'm putting an Dcard-extension to the back for easy access to the disk.
TF534-08.jpg
TF534-08.jpg (141.09 KiB) Viewed 3526 times
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

After some more tuning the result is near perfect. 0,15 mm deep milling with the cheap V-bits included with the machine. It took an hour to mill this. Milling a whole board will take a few hours at this level, but it's better than waiting two weeks for a prototype board from China that might not be working because of a design mistakes.
minicnc06.jpg
minicnc06.jpg (101.15 KiB) Viewed 3517 times
My big CNC machine can do this even better and faster, but it's a chore to set up for small things compared to this.
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

It doesn't boot with the A2090A and accompanying 20 MB ST-506 harddisk installed but I expected that conflict. TF536 doesnt' have that problem, right?
Lynxman
Posts: 180
Joined: Sun Nov 24, 2019 8:09 pm

Re: Noob building a TF534

Post by Lynxman »

That should hold it in. A bunch of zip tie pieces:
TF534-09.jpg
TF534-09.jpg (117.34 KiB) Viewed 3496 times

I also made a holder for the SD-card-extension for easy access. 3D-printed:
A2000-05.jpg
A2000-05.jpg (98.25 KiB) Viewed 3496 times
A2000-06.jpg
A2000-06.jpg (102.76 KiB) Viewed 3496 times
Post Reply

Return to “TF534 (OBSOLETE)”