Just a brief status update to cover the past few weeks. To be honest, not much progress has been made as I’ve had a surprising bump in my consulting business. (No complaints there — having good IT and Software projects lined up as an independent coder based in Hawaii is always an interesting challenge).
Overcoming TinyG v6 Shortcomings
On the Synthetos TinyG v6 – I’m really starting to hate this controller again. If I were superstitious, I’d say the thing is cursed. Aside from blowing a driver chip, I’m now experiencing problems with the Home and Limit Switches. The underlying problem here is that the TinyG’s inputs are 3.3 Volts, which is quite retarded (IMNSHO). Instead of making things easier on the builder and using 5 or 12 volts for these lines — which would make it a cinch to passively run Normally-Closed switches over a few meters of length without fear of the voltage drop — the wretched thing drives and accepts 3.3 Volts, with specific warnings of destroying the Atmel CPU if you send more than 3.3V on those lines. Ugh!
The way I see it, the only reliable way to work with the TinyG’s 3.3V home/limit switch arrangement is to add extra circuitry to manage the switches on 5 or 12 volts (which I have ready access to from the power supply), and convert that to a 3.3V signal for the TinyG’s benefit.
Selecting and Purchasing Router/Spindle and Accessories
‘Finally ordered a REAL router head for the Ox. I settled on the Hitachi M12VC for two reasons:
- There are a handful of reviews about the Hitachi being quieter than most of the other popular routers; and
- PreciseBits.com has a variety of collet sizes available for this particular router (well, some Bosch Routers use the same kit). I went with their combo kit for the most flexibility for this setup.
Aside from ordering a mounting bracket for the Hitachi and a starter set of bits, I’m calling this upgrade done. Next upgrade is to extend the table length (Y-Axis) to the full 3000mm I’m looking for, so I can cut parts from entire plywood sheets. At this rate, I expect to be able to do that in mid-October. Right now, I can work on half-sheets of plywood (4′ x 4′) with the Dremel Clone — when the home/limit switches aren’t glitching up on me. :-p