Quoting a certain Bender Bending Rodríguez.
The Christmas break has finally arrived, so finding just a little time to breathe, including seeing the inside of the shed!
After giving a very quick cleanup (not much more than opening the doors, and using compressed air as a broom), started working through a few quick, but long outstanding jobs.
Starting with the Nova DVR lathe.
For a long time, I’ve been finding it doesn’t always start on its own, and needs to be given a bit of a spin before turning it on, or giving the blank a little slap afterwards to get it underway. I had the opportunity to catch up with the Director of Teknatool at the last Melbourne Wood Show. Among other topics of conversation, I mentioned this (relatively minor) issue. He suggested it is probably no more than a bit of dust impacting on a sensor, but I hadn’t had a chance to now to find out.
Quick blow out with the air compressor, then tried the lathe out at various start speeds, from 500RPM right up to 3000RPM. No hint of an issue at any speed – problem solved.
Next, time to do some maintenance on the 3D printer. It hasn’t been running for a few weeks as I simply haven’t had time to look at it.
The main problem I was having that I could tell, was the filament (being somewhat hydrophilic) had absorbed too much moisture, and was spluttering a lot while it printed.
Took one roll of filament and placed it in an airtight container, along with a packet of DampRid, and a hygometer.
The hyrometer is a bit flash for the job, but I really liked the look of this one from Carbatec
It is a combination of both a hygrometer and thermometer. Beautiful piece, German engineering.
The container (and contents) started at 55% humidity. After a few days with the DampRid, the moisture content in the container had dropped to 12% at 25C.
Seemed a good start. Next, I needed to change out the nozzle. I had played with a 0.2mm nozzle for a while, but wanted to change back to the 0.4mm one. Unfortunately, one had damaged thread, and the other was completely glued to the other printer head with leaked plastic (that head needs a complete rebuild to remove the faulty (leaking) component, and a damaged heater).
Only problem is, removing a nozzle is easy, if you can heat it to normal operating temp (200C). With the heater not working (yet also glued in with leaked plastic) there was a bit of a difficulty. I briefly tried a soldering iron, but there was no way that was going to achieve the temperature needed overall. So next option – LPG burner.
Being careful with the flame, I was able to get the nozzle up to temp, and it unscrewed easily. Continuing with the flame for a bit longer, I cooked off the nozzle, getting rid of plastic on the threads and inside the nozzle as well. The nozzle on the printer was easy – a working heater and thermister makes it very straightforward to remove one, and replace with the other.
A quick print of a mini robot proved everything was working, so I dropped a 5 hour job onto the printer as a bit of sink or swim.
I still have some new components coming for the printer – more on that later.
Finally, I took a quick factitious photo of the cameras, mics and CNC router bits all ready to be used with the YAS Engineering CNC mill when it arrives. Checking with YAS Engineering, and the CNC is only one simple component away from being delivered. Just one electrical connector to go, and the unit will be ready.
Filed under: 3D Printing, CNC, Lathe | Tagged: CNC router bits, DampRid, DVR XP, Filament, Hygrometer, Nova, Teknatool | 1 Comment »