[sburrell]

I'm going to look at a used VMC Arrow 750. Any pointers on items of concern on these machines? What parts are still avail for these?

[larspeed]

I'm going to look at a used VMC Arrow 750. Any pointers on items of concern on these machines? What parts are still avail for these?

Hi, sburrell

I've had a few struggles over the last two years;

- failing HDD (replaced with modern SSD)
- failing BIOS-memory on RT-motherboard (snipped off original battery, and soldered on dual AA-holder for ease of later replacement - set sufficient settings in BIOS)
- seized servo motor bearings (due to storage in unsufficient environment/temperatures - replaced)
- servo drive failing due to aging internal passive components (caps, resistors etc.)
- other strange behaviour (cannot remember exactly which ones) solved by reseating boards and relays.

Other than that - great machine!

[sburrell]

I ended up getting a used Excel Machine. So far pretty happy with it. Nothing fancy.

https://youtu.be/xJu9myVUX80