Recent Posts

Pages: [1] 2 3 ... 10
1
RV Software / You don't need correction for everything !
« Last post by spiyda on May 09, 2017, 10:17:31 PM »
I just wasted a day but learned a lesson which everybody else probably already knew !

I was trying to effectively place 1W loose bead LEDs as the type I wanted were only available in this footprint.


After a bit of thought, I made a track for the vibratory feeder by using a K40 laser to engrave acrylic.
the main areas were removed just leaving tracks rather like railway lines...
the Beads stay aligned and just about keep the machine fed..
( I did celebrate at that point !   ;D )

A few tries with different nozzle arrangements and I ended up with a spare Nozzle 5 drilled out
it fits completely over the lens and sites on the white body of the Led
This was effective at keeping the LED level when in movement.
I did however have to find a spare nozzle 5 holder ( the bit that is captive in the tool rack)
as it has a bigger diameter central hole than the others.

Once I got that sorted, I thought I had it cracked...    ::)

However, the optical correction parameters were a nightmare.
First, they are too big to be imaged in one go..
second, the leads reflect light and sometimes appear light, and sometimes dark
third, a slight distortion of the legs also upsets the camera...  and so on
I spent the best part of a day playing with the various settings until I found the one that mattered..
set correction type to .........."No Correction" !

to be honest, I didn't think about it, I just clicked it in desperation.... !

The machine picked and placed at all sorts of weird angles correctly first time every time.

The point is, with a clunking great component like the LED, with mahoosive pads..
doesn't need to be placed any better than a mm or so...

so no correction.....     :-[
2
For Sale/Wanted, Suppliers / RV Tools for sale (New)
« Last post by phonoplug on April 11, 2017, 10:43:27 AM »
I've finally got some made and given them a good test drive. They do not have (nor need) the brass ring that the old ones have in them - the one that keeps falling out that is. An immediate noticeable improvement is the occasional 0603 capacitor that is placed at the wrong angle, often ~45 degrees, has now disappeared. I think this is a symptom of when the tool becomes 'chiselled' with wear.

The chap I found has done a really good job on them, he was recommended based on them needing to be very accurately made, but they have come out a bit more expensive than I was hoping as a result. They also took about 6 months!

So I have some T6, T1 and T2 available, not a great number, but I would hope that I can get more made from the same route if needed. Cost £40 each + VAT.
3
RV Hardware / Re: Z axis Dropping
« Last post by spiyda on March 23, 2017, 09:12:31 PM »
@ telted

fingers crossed..   

and try gluing the broken bits of nozzle with Loctite 410
I was amazed they were strong enough to use on the machine within 30 minutes... 
I managed to save most of the broken ones for a second life

I've still got my doubts as to whether pin 9 is actually connected to anything,
however, my theory is that if the machine thinks it is, adding a switch it may fool the machine into behaving..

on a plus note, since adding the switch, zero "Z" axis crashes,  100,000+ components
4
RV Hardware / Re: Z axis Dropping
« Last post by telted on March 21, 2017, 05:09:14 PM »
Recently, we've had a few problems with our RV4S the worst being many nozzle crashes through the Z axis dropping. A different error was when the machine started up with a 'waitnotbusy' error message prior to the arm startup sequence and warm up routine. More error messages followed and ended with an 'R Axis Move Error' message, during all this the arm did not move at all.

Switched off, dismantled the PC and removed the RV ISA card. Re-seated all the ISA card sub boards contacts by wiggling them a lot and re-inserted the ISA card into the PC a few times to clean the edge connector contact surfaces. Re-assembled and the RV4s ran properly with no startup error messages. It seems this fixed the 'R Axis Move Error' problem.

Went on to place around 3000 components and then the nozzle crashed, (lowered nozzle hitting the front of a feeder hard and snapping off the tip, as usual). So, the above didn't fix the Z axis dropping problem.

Since replacement nozzles seem to be pretty much unavailable now, we have had to resort to making our own using our 3D printer. This is quite time consuming as the nozzle has to be made in two parts and then solvent welded together and finally drilled and matte black coated.

Read spiyda's comments about fitting a switch in the pin 9 connection of the "Z" axis stepper driver CN1B and thought it might be worth a try. After working out which CN1B board it was using George04's wiring diagram (turned out to be 1st board on the left), we fitted an on/off switch on the wire going to pin 9 and set it to the off position. Started up the RV4S and went on to place over 4000 components without a single nozzle crash.

However, we started to see that only some of the components on one particular feeder lane (G0) were being placed - the same lane where previously the nozzle crashes occured. When we checked the status for that lane the machine reported 'Feeder not reachable' and the 'No Entry' style symbol appeared against that lane. Tried to reset the bias but 'Feeder not reachable' kept coming up. Had to set 1st Ref for that feeder followed by selecting 'Yes' to 'Resetting all the biases' to clear the feeder not reachable problem. This was a pain as we had to set the biases for all the other lanes again.

Still, this was much better than crashing nozzles! However, the 'Feeder not reachable' error kept occurring too frequently until it was happening on every board.
At this point we moved the problem lane to another feeder and this seemed to solve the problem. Went on to place over 20,000 components with no nozzle crashes or 'Feeder not reachable' errors.

I think our problem was slightly different from spiyda's in that our z axis drop was being caused by an x/y axis error instead of a z axis worn rack problem, but the same 'switch-off the power' to the z stepper via pin 9 was causing the nozzle crashes. Anyway, thank you spiyda for steering us in the right direction and I hope our experience can be of some use to others.

5
RV Software / Re: Gerber issue with 45 degree components
« Last post by PSMike on February 25, 2017, 12:45:19 AM »
Thanks guys, will give it a go.
6
RV Software / Re: Gerber issue with 45 degree components
« Last post by Jason on February 24, 2017, 09:08:11 PM »
I'll update the ULP that's attached over the weekend. I think I may have a newer/smarter one
that deals with parts which aren't in the CDF library better. I'l go rummage.
7
RV Software / Re: Gerber issue with 45 degree components
« Last post by Mike on February 24, 2017, 07:57:16 PM »
I just sticky'd Jason's utility for ease of finding.
8
RV Software / Re: Gerber issue with 45 degree components
« Last post by Jason on February 24, 2017, 08:31:15 AM »
RV gerber only displays pads if they are gerber "flashes".

I just opened a paste layer generated by Eagle into GerbV.
When I highlight a regular pad it comes up as a "Flashed Aperture"
When I highlight a 45degree pad it comes up as a "Polygon".

Not sure if this is something that can be fixed in the Eagle CAM processor.
It certainly supports a number of Gerber variants so it might be worth
trying something other the 273x.

Alternatively, use my transfer file creator Eagle ULP. It's not perfect but
it hops over the need to send gerber and bom to RVgerber. I have done
a board with a 45 degree TQFP this way and is the reason I never noticed
this issue myself  8)
9
RV Software / Re: Gerber issue with 45 degree components
« Last post by Mike on February 23, 2017, 10:07:52 PM »
I don't use the Gerber utility - not sure if anyone else here does.
Working from Gerbers isn't a very good way to go as you don't have all the component data.
Take a look at my import utility as this will get you straight to a TFR file from a CSV of part data.

A quick & dirty fix for the angle issue may simply be to rotate the parts to 90 deg, import, then tweak the rotations back in RV Setup
 
10
RV Software / Gerber issue with 45 degree components
« Last post by PSMike on February 22, 2017, 07:53:34 PM »
Hi

Any tips for gerber production. I can't put down parts on pads at 45 degrees as the pads do not show.

Image is left to right, gerbview, paste gerber in rvgerber 2.8 & paste & tracks in rvgerber v2.8.
I used standard gerber exports and the versatronics cam from this forum, bot the same. Eagle 6.4 Linux.

Thanks
Mike
Pages: [1] 2 3 ... 10