Resurrection of a Hercus v300 Compumill
Hi all,
I'm new to this forum, I am a final year student and my final year project is to take an old Hercus v300 Compumill and rip out it's electronics and replace them so that it can become operational again. I am totally new to this and I would appreciate any help.
So far I have seen a previous article here about a Hercus CNC v300 Compumill, however it was quite limited and so is the manual I have. If anyone knows where I can get a service manual or something that can tell me a little more about the circuits and drives that I'm dealing with I would really appreciate it.
The ANCA 2000 board that contains all the high level electronics has had coolant leaked onto it and after storage in a shed for several years it's become significantly damaged. This is the reason that we acquired the machine without a hefty price. The drives and spindle and mechanical parts (as far as I've been told) are in perfect working order, it's just the electronics that are screwed up. My project supervisor and I quickly decided that the best option would to replace the ANCA 2000 board with some newer electronics.
I'm now at the stage of trying to access the motor drives and the resolvers to try and figure out a little more about how the machine works.
I'll be doing that tomorrow, I'll keep everyone (which is basically myself so far) posted.
PS: Does anyone know anything about how to make polycarbonate safety covers??? (Yes, I know, I really have jumped in the deep end with this project... )
Thanks.
Sorry about the late reply...
Howdy:
I do search this site for Hercus comments from time to time. I must have missed your question.
I revived a Hercus V300 mill and I am working on the lathe too.
Back in 2005--or about then--I found the DeskCNC system at IMSERVICE and took a chance on getting it to run something as large as the Hercus mill.
It works great. I bought the fully assembled controller and got the mill working in a few weeks.
I installed the Globe motors that IMSERVICE supply and that was very easy. I feared that I would need to hand machine some adapters; however the motors were almost a direct replacement for the Hercus servos. The mounting screws, motor collar, and drive shafts are English units. The four bolt hole are placed identically to the holes on the original servos. All I had to do was use the English unit screws that came with the motors. The motor collar is 1 inch diameter, 25.4 mm, so it wouldn't fit in the Hercus mounts. A rough file took care of that in a few minutes--you can either file the motors mounts larger or file the motor collar smaller. Finally, I drilled out the pulley for the belt drive so that it fit on a 0.250 inch (6.35 mm) motor shaft instead of the 6 mm motor shaft.
I removed and stored the original servos and encoders. I plan to use them with DeskCNC and Gecko drives to bring the machine back up to full power some day. If I knew enough back then, I would have done that from the start.
The globe motors have the encoders on the motor. I often think of mounting them on the roller screw like Hercus did; I have not tried it.
I did not need the gear reducers on X and Y axis. I installed the reducer on the Z axis because I was getting faults during my tests. I bought a 4 axis system and I did not install the 4th motor/encoder. That would cause random faults that I believed to be the Z drive stalling while raising the heavy spindle. By the time I realized that random noise on the 4th axis encoder input was to blame, I already had the Z axis driven by the gear reducer.
We've run the machine hard for three years now will little trouble. I will be glad to finish the lathe. I bought the kit instead of the prebuilt controller to save some money and I haven't finished the upgrade in two years. I hope to work on it this August.
The old controllers are not worth bothering with--although you might sell them on ebay. A lot has changed in the last 20 years.
The machine is doing well, but I need to adjust the satellite roller screws. Many years of use by students brought in too much backlash. I found the original supplier for the screws. If I could find the screw numbers, it is possible to adjust a spacer and reduce the backlash. However, my roller screws do not have the part number engraved on them. Some satellite roller screws need a thicker spacer and other designs need thinner spacers to control the backlash.
Perhaps you've finished your project by now. If so, I hope that it went well.
Regards.
Sorry about the late re-reply...
I gave up checking this forum a long time ago. But I just took a look back a few days ago and unfortunately, my project is over now...
I made custom circuits and had them etched. The only thing that remains is to see if they work.
The project is by no means even close to completion. There are a lot of aspects to the project that I didn't mention before... anyway...
I'll try keep this thread up to date in case anyone in future wants to look at it.
Thanks for the reply anyway.
Regards.