Another new RV1S user and USB2ISA

[alanambrose]

Hey Mike,

>>> I just set up two RV1s with consecutive serial nos ( 167/8)

Ah mine is RV1S_152 and it doesn't have the com ports populated. And if I had known you might offer a set-up service

>>> Polymax Nitrile 8x1mm seem to work well

Ah good I had some of those in my order.

>>> DO NOT MOVE THE FID CAM

Ah yes, I had seen this warning reading the old forum posts, but thanks for the reminder. Actually, I might not have been clear, I was just trying to figure whether I could make the Z-axis stop a bit higher and which thing dictated the max Z travel (board, feeders, toolpost, FID focus distance etc). I'm thinking the tool rack is the lowest legitimate position of the Z-axis and therefore the stop could be max 4mm higher. I'll leave it for now until the whole thing is operational.

Alan

[alanambrose]

Hmmm, I having some difficulty getting the tools to load and release reliably. I've tried a little Platenclene on the o-ring spigot thing 'tool holder' and in the inside of the brass rings in the nozzles. Also spiyda's ball bearing tool position setting technique - these have helped quite a bit but I'm still not there. This machine has been sitting around not being used much for the last 7 years, if that makes a difference. The symptom is that the pickup sometimes happens a bit crooked and the nozzle doesn't go all the way onto the spigot and/or it goes through the nozzle release routine but doesn't. The latter is a bit fast, so I have not quite seen what's happening there.

Any thoughts?

Alan

[Mike]

platenclene is probably what you don't want as it makes it more grippy.
Plenty of silicon grease on the o-ring and inside the brass sleeve - makes sure the nozzle that it goes on & off smoothly by hand.
Also make sure all the plastic inserts in the tool holders spring up & down freely - sometimes parts get stuck round the edges and jam them. Also I vaguely recall the spring comes from foam underneath, which may have deteriorated

[alanambrose]

Hey thanks Mike,

Yeah it did seem to get worse after I used the Platenclene

The silicone grease helps a lot ... so nearly there with the tool loading.

Also I did my first bona fide fix to the 'having to assist the z axis when starting' problem. It was the fastening of the vertical rack to the arm - the screws were a bit loose and the rack was disengaged from the pinion at the bottom of the z-axis travel. These ones here:

http://anagram.net/nuts/Versatronics/Rack%20fastenings.png

Obvious really...

Alan

p.s. the rack and pinion look very replaceable with slightly modified off-the shelf parts, and maybe with brass versions.

[alanambrose]

I did a rough-and-ready repeatability test this week to get an idea of how much slop there is in the arm mechanism. Put a 5mm dial indicator vaguely aligned in the x-direction resting on the pick-up head which was vaguely in the middle of the bed. Stepped forward and back along X to reasonable limits on the indicator. I was surprised to find very little error when stepping back and forward ~ <0.01mm. 80 GUI steps ~= 2.01mm - so 1 step ~= 1 thou, actually .99 thou. And that was without the warm-up procedure. So surprisingly good I'm thinking - as the small dimension on an 0402 is 20 thou then 1 thou s.b. ample accuracy/resolution.

A.