daba1955
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Posts posted by daba1955
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Having worked in industrial automation for over 30 years, I can honestly say I have never seen an enclosure where ALL of the separate panels, doors, cable gland plates etc. were not physically bonded with a decent sized bonding wire back to a central bonding location or strip.
Even if the door only had LV circuits on it, like 12/24V lamps and pushbuttons, displays etc., the door was bonded to earth.
On the lighting fixtures in question, I very much doubt any testing could have been carried out, since all of the visible and available screws were black japanned and would not have been a decent connection to the panel they were screwed into. The lamp housing in the movable head carries the striking voltage for a mercury vapour lamp, and this removable assembly (enough to change the bulb) was not earthed at all. Earth bonding was provided near the back panel where mains voltage enters the equipment, but the front panel where the pushbutton/display board sits was not bonded, other than through the powder-coated chassis components being screwed together with painted screws - no star washers anywhere.
Just feel that it's a accident waiting to happen.... -
On 5/2/2023 at 10:54 PM, KevinE said:
Modern prolight (isolution) stuff certainly have their panels bonded either by bare parts under the screws or by seperate earth cables. But I wouldn't be too concerned, I've seen it on many things with powder coated steel casings, amplifiers, lights, what-have-you. Maybe those lights originally had a star-washers under one screws that could bite through the paint, and they got lost, unless you're the first to dismantle them. If the part in question is not designed to be routinely handled while in use, I doubt it presents much risk in reality, no matter what the relevent standards may require.
In this instance, the fixtures were sold to a gigging DJ, and they'll be rigged and de-rigged with alarming regularity - up to 4 times a week. I didn't feel comfortable not doing anything....
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Bit of a long-shot, but does anyone have an iSolution iMove 250S handle going spare. The last one of 3 refurbished/reconditioned units is missing one handle, which are essential to the fixture because of their weight (23Kg).
It could be possible that the same handles are used on other iSolution fixtures - fixing holes are 108mm apart, and take M8 bolts.
If anyone has one to sell, I'd be happy to pay a reasonable price, and pay for P+P
TIA
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I have the shorter version of the 1500W - its 750W, so googled VDP750ST and found the manual for it.
I needed the manual for the DIP switch settings.
Thanks for taking the time and pointing me in the right direction..... -
During the restoration of some iSolution iMove 250s moving head fixtures, I noticed that the outer casing top/side panels are not properly bonded to earth/ground, which raises a safety issue.
These outer casings are powder-coated, and are each held in place by 4 painted screws. Absolutely nowhere has any provision been made for ensuring these panels are effectively grounded. I have no idea how they got any form of certification for them .....
On the ones I have repaired/restored, I used a dremel to expose bare metal on the faces where the panels meet up with the chassis (which is bonded to ground), the underside fixings have had their powder-coating removed, the screws have had their shoulders bared, and they were put back with serrated washers. At least we have metal-to-metal contact. Hardly ideal, but much better than stock !!
A thorough tear-down might reveal other areas of concern about proper grounding, especially since all the internal screws are painted. I fear the ideal arrangement will involve a lot of earth-bonding cables !!! -
Think I've found it ....
Now just got to find a manual for it ....
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I have the strobe light pictured, and it has absolutely no makers name on it ....
Does anyone recognise it ?
https://www.dropbox.com/s/7e7ycvlys74xfai/2023-04-25 11.59.12.jpg?dl=0https://www.dropbox.com/s/sbg7ivepwz1i5jy/2023-04-25 11.59.23.jpg?dl=0
https://www.dropbox.com/s/u5rua6r7dwba1os/2023-04-25 11.59.34.jpg?dl=0
https://www.dropbox.com/s/o5zur3cxh8iypcl/2023-04-25 11.59.51.jpg?dl=0
https://www.dropbox.com/s/0fpkwpde1qupme1/2023-04-25 12.00.17.jpg?dl=0
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Looks like it's the same on the iRock 5S and 5B, and probably the whole of their fleet.
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I've got a couple of iMove 250s moving head fixtures that have gone to 9999 fixture hours, and there they stay, permanently.
I'd prefer that fixture hours to be lamp hours to be honest, but haven't yet found a way to reset the 9999 back to zero.
Find it strange that there's no documented way to reset it. Does anyone know if it's even possible ?
Insufficient earh bonding - iSolution lighting fixtures.
in Safety
Posted · Edited by daba1955
Pricing and aiming at a target sector should never be a substitute for any safety issues. I would never undertake any modification to equipment that I felt unnecessary.
Using non-visible, sketchy, and in the worst-case scenario, ineffective grounding methods is a no-no IMHO.
But I hear what you are saying, however I doubt any law-suit would go ahead if I've made a product safer for the user, without compromising its functionality.
Prolight do not make, and have never made these fixtures, they just inherited the name iSolution- nor do they support them, and I'm guessing their current product range meet all safety standards.