Recent Posts

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RV Software / Re: Sometimes miracles happen!
« Last post by phonoplug on August 16, 2019, 06:50:57 PM »
You know, the panel after this it threw loads of parts to make up for it!

5 panels today (took most the day!), second and 5th were like this with no rejects.
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RV Software / Re: Sometimes miracles happen!
« Last post by trev on August 16, 2019, 06:37:45 PM »
It is obviously photoshop'd.  :P
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RV Software / Sometimes miracles happen!
« Last post by phonoplug on August 16, 2019, 03:15:43 PM »
1344 placements, zero retries!
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For Sale/Wanted, Suppliers / RV1s on eBay
« Last post by spiyda on August 16, 2019, 11:22:51 AM »
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For Sale/Wanted, Suppliers / Re: Decent handheld multimeter
« Last post by spiyda on August 10, 2019, 04:38:19 AM »
It s not a "decent" meter, but you did say for a second meter..

For shear value for money, accuracy out of the box and functions, the little victor VC921 meters are hard to beat
they come with various brands on them for excample
https://www.ebay.co.uk/itm/ZOTEK-VC921-Mini-Portable-Digital-Autoranging-Multimeter-Pocket-Multimeter-XU/283405452168
the chip in them seems to be as good as any 3 1/2 digit meter.
Autoranging, capacitance to 200 uF, frequency to 10 Mhz, REL and Hold,

they are only CAT II and don't read current but for the same price as a decent meter, you can get half a dozen.

I have about 4 and they all read well within their stated accuracy, and they fit in your pocket !
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RV Hardware / Re: setting tool positions
« Last post by trev on August 07, 2019, 10:41:28 AM »
This very clever, thanks for the information

Trev
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For Sale/Wanted, Suppliers / Re: Decent handheld multimeter
« Last post by trev on August 07, 2019, 10:04:09 AM »
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For Sale/Wanted, Suppliers / Decent handheld multimeter
« Last post by phonoplug on August 06, 2019, 11:58:18 PM »
The time has come to get a new meter. My 'second' one has suddenly started measuring very strange things and given its almost 30 years old I'm happy to say its done its time.

So my 'first' Tektronics one can now become the spare and I need to get a new sparkly one for its replacement.

I've never been a huge fan of Fluke though mostly they are undenyably decent pieces of kit. There are a lot of new names in the game since I last looked. Any suggestions? Budget up to £300 max but would prefer if it was closer to £200 or so. Don't want any scope functions, just a decent TRMS, robust bit of kit that will last a good number of years.
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RV Software / Re: Repeatable placement issues
« Last post by spiyda on August 05, 2019, 05:00:11 PM »
Trev,
the tool pickup position is critical as any error there can cause the odd step to be lost
It was also a contributory factor to me losing z axisposition early on... a badly worn rack and it caused the machine to jump a tooth.

have a look at the method I used to set the positions using a couple of steel balls, it actually works !


    Mike's Forums »
    Versatronics RV series Pick & Place machines »
    RV Hardware »
    setting tool positions


Chris
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RV Software / Re: Repeatable placement issues
« Last post by trev on August 04, 2019, 05:08:23 PM »
Thanks.

I have found so far that if I do not zoom in or upset the default view when entering that screen it seems to not throw a wobbler and ccorrupt. As soon as I zoom in on an area the offset appears.

Placement is now repeatable. I think its just getting familiar with the machine and a friend helped me check a few things. I think the tool pickup position was not quite right which was not a good thing mechanically for the machine. Also it wasnt always picking components up cleanly - possible due to tool position stuff. I did find that once I had the components picking up, I had to lock the x and y on the component because occasionally it would just drift off position. It was strange because it would sometimes just start missing the pick up point on a tape. As soon as I locked X and Y I never had any issues again. Placement was pretty good for 0603.

Also the auto fiducial would align off position sometimes. Think this was due to the threshold not being great. I might make Mike's LED board for that camera and see if that makes it more reliable. But if the auto fiducial doesnt align quite right then this obviously would create component position skew.

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