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Messages - Mike

#1
RV Hardware / Re: CL feeders on RV
March 26, 2024, 10:54:08 AM
I bought a CL feeder a while ago to look at - would be interested to see your mounting details.
 
#2
RV Software / Re: Feeder and explorer
March 08, 2024, 01:08:55 AM
I think the only permanent place to edit the feeder indexes is in teh .fdr files, which is a pain - one of the few really dumb design decisions - they should always have been in the CDF as they depend mostly on componant size.

As regards  W98 crashing, adding more RAM might help - ISTR having some issues a while ago that were fixed this way
#3
RV Hardware / Re: Scara
January 06, 2024, 10:25:24 PM
Received the parts -  was puzzled for a while as they came with no info & took a while to realise what this seemingly random box of bits even was, as it was a while since I ordered!
Having remembered, it then took a while to find any info on assembly as I couldn't remember where I'd found out about it & for some reason it wasn't in my Aliexpress order history.
Haven't got around to doing anything with it since...


#4
RV Hardware / Re: Scara
December 12, 2023, 09:21:53 AM
Interesting - I've bought a couple to play with
#5
RV Hardware / Re: Scara
December 11, 2023, 08:11:25 PM
Quote from: trev on December 11, 2023, 07:12:34 PMHi Mike

You can set a useable area but I do not know if that is any more than a rectangular size or if with SCARA there is more complex configuration.
Scara has an inherently non-rectangular working area - the RV software has some maps in config files somewhere showing valid positions in a 1" grid.
The way the machine is laid out, it is necessary to be able to access pretty much anywhere that's physically reachable, and that adds the complication that some moves need to be split to avoid moving through unreachable areas
QuoteThe motion geometry would be taken care of by the motion controller board; the Duet3D XD in this case. You would feed it x and y co-ords and it would move I think.

Also, it would need to deal with the very unusual 5-phase steppers that the RV uses - for that reason alone I think you'd be stuck with the original Sanyo drivers and PSU box.
If you can ignore the duet3d onboard drivers and get step/direction signals that took the SCARA stuff into account, you could feed these to the original drivers, it would just have slightly different scaling. 

QuoteThis is something I found on setting up the board for SCARA. It is related to a 3d printer but the movements are what's important. OpenPNP takes care of the rest.
But what about the fact that the fid camera has an angular offset from the head centre which depends on the position? I think  you'd need to reference the output of the SCARA processing to be able to claculate this.
QuoteI find the RV so frustrating at times. Today I built some boards and after about 20 the vision on a couple of parts had changed a bit. It started the day fine and the light was constant through out the morning. I just never know when I will get an issue.

I found that doing the lighting upgrades described elsewhere completely fixed all the vision issues I ever had, particularly the sensitivity to ambient light.  Literally anything from indirect sunlight to artificial light makes zero difference now. It also happily tolerates all the LED tape I've put inside and on the head, which used to cause position-sensitive issues for the flying cam.
Seriously this is the about best upgrade you can do, second only to using the gamepad for manual control.

QuotePlus the feeders are a pain.

no argument there..!
TBH If I were to spend more time improving my machine, I'd be looking at adapting Yamaha or similar "big boy" feeders
QuoteThen the waffle trays forget the orientation sometimes and you have to refill and rotate 2 or 3 times before it sorts itself out again.
I've never seen that, as long as you remember to answer "no" to the rotate prompt when refilling, though I don't use trays very often
QuoteYou cant go lower than 0603 and fine pitch is really tricky.

OpenPnP isn't going to fix that either - I'm certain this is a limitation of the mechanics, though higher-res imaging may make a small improvement. I have done dense 0402 LED arrays on occasion, but that's very much an "on a good day, with the right phase of the moon" sort of thing.
QuoteThen the issues with the screen going funny.
Annnoying but minor as there is an easy and quick fix for that without having to go through the homing again - just load any other job file, ignore feeder warnings and reload the original file & you're back in business in a few seconds.

I agree that there are a number of annoyances, but I'm sure the process of getting it to work with different hardware/software would be at least as time-consuming & annoying !

#6
RV Hardware / Re: Scara
December 11, 2023, 05:18:33 PM
Yes, it is a SCARA type geometry
Aside from the presumed need for calibration, I wonder if it would cope with:
The position-dependent offset between the fid cam and the head
The constraints on reachable area including having to do some moves in two stages
The on-the-fly vision of the RV4.

Apart from a handful of annoyances, the existing software is sufficiently useable that a major change like this would be a ton of work for questionable benefit.

#7
RV Hardware / Re: resin printed nozzles
August 01, 2023, 12:43:33 PM
Out of curiosity I tried printing Tool 1 in PLA on my Bambu X1.
Finest profile ( 0.08mm layer) , with support, 0.4mm nozzle.
Looks pretty useable with a little clean-up, would need the hole drilling (or melt a stainless syringe needle through). Would definitely need the brass ring.
Support was definitely needed, and wasn't hard to remove

Tip maybe on the large side, but using a stainless dispensing needle could be a solution to that

Probably more durable in nylon or PLA-CF, but seems strong enough to be useable in PLA
#8
RV Hardware / Re: resin printed nozzles
August 01, 2023, 11:19:53 AM
I'm not familar with resin printers, but I suspect these may need some tapering on the internal horizontal surface to avoid the need for support.
#9
RV Hardware / Re: resin printed nozzles
July 30, 2023, 05:36:55 PM
Not seen STLs but there are some 2D drawings here http://electricstuff.co.uk/forum/index.php?topic=59.msg267#msg267

Bear in mind that the background the camera sees needs to be dark, so a resin nozzle may need some covering or painting - maybe just a black Sharpie.

You probably still need the brass ring.

If the hole is an issue, this could be drilled afterwards, as long as there is at least a centre mark.
Another option may be to use a stainless dispensing needle as a liner.
#10
RV Hardware / Re: 3D printed PCB corner block
July 28, 2023, 11:43:14 AM
Here's a straight version, for when the PCB is hanging over the edge of the base. Uses the retainer from the corner block .zip above
#11
RV Hardware / Re: Fixed camera lighting upgrade
July 15, 2023, 12:12:58 PM
Not sure what you mean by "doesn't do rotation or movement" that - both cameras measure offset and rotation to provide a correction for the placement position.
After doing the camera centre adjust, this should calibrate the camera positions relative to the nozzle, and placement should then be the same regardless of camera used.
There may be some threshold differences between cameras, but not placement offsets.

As mentioned above, after doing the upgrade I noticed some offsets between fixed and OTF, but these went away when I did the centre adjust - don't recall if I only did just the OTF, or both.

#12
RV Hardware / Re: Fixed camera lighting upgrade
July 07, 2023, 07:21:40 PM
Just going on first principles, once calibrated, both cams should be aligned to "true" centres and no offset should be needed in the CDF.
It could be there are some oddities in the software ( or maybe a bent nozzle shaft), but I've never had any need to do any manual offsetting, apart from the occasional pick offset on asymmetrical components
#13
RV Hardware / Re: Fixed camera lighting upgrade
July 06, 2023, 01:48:55 PM
Quote from: trev on July 05, 2023, 03:13:54 PMManaged the white led OTF upgrade. Seems to be doing the trick. Took a bit of calibration and a placement offset adjustment in the cdf file but placed great after that. Real speed improvement to be able to use OTF reliably.
Assuming you removed the mirror, did you do the camera centre adjust as mentioned above?
Changing illuminator shouldn't need a placement offset adjust, only the brightness threshold.
#14
I found that roughing up didn't make a big difference, also tried putting a small o-ring round the reel, but also didn't do much, though may be worth trying different sizes as I only used what I had to hand.
#15
First run of this was a big success - absolutely no lazy pull-off issues at all, compared to typically 3 or 4 feeders in a bank having slip problems before.
Time will tell if there are any long-term issues with wear or belt tension.
I notice that the belts have quite a lot of residual tension after a few feeds, so as I don't use the machine much I'll try to remember to release the tension after a job.