Hi,
Thanks Lawrence. Ideally I would like to follow Nick's advice and stick with the manufacturers settings but unfortunately I'm unable to do so through lack of information as to what needs adjusting in the parameters; I've done the known things but with only limited success so as you say I can try using Refugee's suggestion and hopefully keep pestering the VFD seller and browsing the web.
What a tremendous difference it has made connecting the feed to the +5V; the pot is now giving a third sweep which is a vast improvement and really I could live with but tomorrow I'll connect a second pot in series with the 5V feed and adjust this until I can obtain full sweep on the original 10K pot. I can get this to very fine limits because the VFD has a rev counter; once the resistance is known I can then add a suitable series permanent resistor in the 5V feed or better still revert back to the 10V feed with a suitable resistor? Connecting the 5V feed didn't cause any problems and there were no obvious signs of distress from the VFD? Many thanks Refugee.
At 3,000 rpm this Graduate is simply wonderful.
Not the best of days for me with a lot of running around and problems at Screwfix in Huddersfield. I wanted a number of items from Screwfix because I'm adding better lighting into the garage. Sorry; we've none of those in stock; sorry we've only got so many of those in stock; OK try another make; I wanted MK single surface boxes so LAP was tried sorry none of those either; right I need oval conduit clips and four packs of five; sorry we've only got three packs. What the heck it is bread and butter stuff I wanted and there should be thousands of these items in stock. I was in the store quite a while and eventually my number was called for me to say I ordered oval conduit and this is round; so another long wait until the correct conduit was located; the staff are always excellent and Screwfix is a favourite store of mine but this sort of thing isn't the way to attract repeat customers. Add to this it took over a hour and a half just to visit Screwfix; collect a prescription from the surgery and collect the prescription from the pharmacy I lose the will to live. By the time I finally arrive home I don't feel like doing anything. Well that's my moan over for today.
I wonder if I'll receive a reply from the VFD seller on eBay?
Sorry Refugee; I didn't see your last reply before posting. I think you've answered my problem why two 5K pots in series didn't work? If I read your information correctly I need to add a fixed resistor between 10V and ground which in effect is simply connecting to each end of the pot track?
Kind regards, Col.
Thanks Lawrence. Ideally I would like to follow Nick's advice and stick with the manufacturers settings but unfortunately I'm unable to do so through lack of information as to what needs adjusting in the parameters; I've done the known things but with only limited success so as you say I can try using Refugee's suggestion and hopefully keep pestering the VFD seller and browsing the web.
What a tremendous difference it has made connecting the feed to the +5V; the pot is now giving a third sweep which is a vast improvement and really I could live with but tomorrow I'll connect a second pot in series with the 5V feed and adjust this until I can obtain full sweep on the original 10K pot. I can get this to very fine limits because the VFD has a rev counter; once the resistance is known I can then add a suitable series permanent resistor in the 5V feed or better still revert back to the 10V feed with a suitable resistor? Connecting the 5V feed didn't cause any problems and there were no obvious signs of distress from the VFD? Many thanks Refugee.
At 3,000 rpm this Graduate is simply wonderful.
Not the best of days for me with a lot of running around and problems at Screwfix in Huddersfield. I wanted a number of items from Screwfix because I'm adding better lighting into the garage. Sorry; we've none of those in stock; sorry we've only got so many of those in stock; OK try another make; I wanted MK single surface boxes so LAP was tried sorry none of those either; right I need oval conduit clips and four packs of five; sorry we've only got three packs. What the heck it is bread and butter stuff I wanted and there should be thousands of these items in stock. I was in the store quite a while and eventually my number was called for me to say I ordered oval conduit and this is round; so another long wait until the correct conduit was located; the staff are always excellent and Screwfix is a favourite store of mine but this sort of thing isn't the way to attract repeat customers. Add to this it took over a hour and a half just to visit Screwfix; collect a prescription from the surgery and collect the prescription from the pharmacy I lose the will to live. By the time I finally arrive home I don't feel like doing anything. Well that's my moan over for today.
I wonder if I'll receive a reply from the VFD seller on eBay?
Sorry Refugee; I didn't see your last reply before posting. I think you've answered my problem why two 5K pots in series didn't work? If I read your information correctly I need to add a fixed resistor between 10V and ground which in effect is simply connecting to each end of the pot track?
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
