15-11-2013, 04:27 PM
Hi,
WOW what a lot of welcome information to digest; my poor brain.
Before going out this morning I logged on and read the most recent posts which I found both very informative and interesting especially your's Refugee with the circuit diagram.
As I was reading I thought all this is getting out of hand and becoming increasingly complicated; at least to me anyway. I was worried about connecting lots of pots with equally lots of wiring with the possibility of accidentally damaging the VFD due to my limited knowledge?
Whilst out we detoured to Maplins where I bought 6M of screened single core cable; they didn't have twin or quad core in stock; also bought were a pair of 8K2 and 7K5 resistors.
Regarding the motor being connected and set up correctly Nick; an excellent question but I'm used to playing around with motors so yes all is OK in this area but many times such a simple question can solve a problem especially for a complete novice.
After dinner I set to with a passion. First things first; try out Refugee's theory regarding 1VDC being equal to 1,000 rpm. I decreased the frequency at PD005 to 40 and at switch on the pot gave even less sweep; I then increased the frequency to 130 at PD005 and sure enough now the pot had a wider sweep so I can confirm you are bang on Refugee; well done.
I'm becoming more agile between laying full out under the hall floor and start/stopping the VFD from the remote controls in the garage. In basic terms what I needed was a voltage dropper? I'm used to these having restored many vintage radios so first thing I did was to attach a pair of short tails to one of the 8K2 resistors using solder.
I removed the cable from +10V on the VFD and connected one end of the resistor into the 10V terminal connecting the other end to the just released lead (Series). This I can understand and sure enough the result was a larger sweep of the wiper but still only giving half sweep which was a big improvement over a sixth sweep without resistor installed.
OK so now I had achieved half sweep at 10V with resistor installed; what if I connect to the 5V terminal on the VFD? I connected to the 5V terminal and great the pot was now giving full sweep at the required top speed of 3,000 rpm with about 10 degrees of dead pot from zero rpm which isn't much of a problem.
So now with all the information kindly supplied by you guys I've now got the answer to my original question and the lathe is fully usable.
I'm downright stubborn though and thinking about the results regarding the 1V = 1,000 rpm and both Nick and Peter saying the VFD should run without modification from the 10V with a 10K pot once again I lay under the hall floor and started to read the instruction manual doing a bit of key pressing having to keep moving between my prone uncomfortable position to standing in the garage to start/stop the lathe.
I knew something had caught my eye previously whilst reading the manual so I took my time reading through each parameter whilst I was growing colder and colder then I spotted it at PD070; Analog Input? This looked good to me so play around a bit; "0" it was set to was giving the current results; "1" increased the sweep and at this point it was still hooked up to 5V. "4" had a dramatic influence; the speed now dropped right back?
Then I thought the pot is giving a much reduced speed to previously and surely this is a step in the right direction and possibly a big breakthrough? I completely removed the resistor and reconnected the pot directly to 10V. What a huge improvement; previously with the current connections and 10K pot into 10V I could only achieve one sixth sweep now with PD070 set at "4" the pot is giving a good half sweep?
I think this result proves the problem to be associated with parameter adjustments and what a positive result for a change?
At this point I simply had to quit as I was by now feeling frozen but I'm now very optimistic about getting this VFD set up as intended by the manufacturer; what a pity though Huanyang are so backwards at coming forwards with information to save all the hours so far put in by me and of course all you guys who are trying your best to help me out which I can't thank you all enough for.
Perhaps PD070 isn't the correct parameter to adjust to achieve the result I'm after but it's only a matter of time before I do stumble upon the answer; PD070 however is a positive step in the right direction; how many more steps to take yet?
I'll spend more time reading the manual looking for "analog" or anything to do with remote controls; the answer is there I just need to identify it?
Any ideas on this new information are still most welcome and I'm pleased this problem has generated so much interest; it's even electrical unlike my usual chimney building or tree felling activities.
Kind regards, Col.
WOW what a lot of welcome information to digest; my poor brain.
Before going out this morning I logged on and read the most recent posts which I found both very informative and interesting especially your's Refugee with the circuit diagram.
As I was reading I thought all this is getting out of hand and becoming increasingly complicated; at least to me anyway. I was worried about connecting lots of pots with equally lots of wiring with the possibility of accidentally damaging the VFD due to my limited knowledge?
Whilst out we detoured to Maplins where I bought 6M of screened single core cable; they didn't have twin or quad core in stock; also bought were a pair of 8K2 and 7K5 resistors.
Regarding the motor being connected and set up correctly Nick; an excellent question but I'm used to playing around with motors so yes all is OK in this area but many times such a simple question can solve a problem especially for a complete novice.
After dinner I set to with a passion. First things first; try out Refugee's theory regarding 1VDC being equal to 1,000 rpm. I decreased the frequency at PD005 to 40 and at switch on the pot gave even less sweep; I then increased the frequency to 130 at PD005 and sure enough now the pot had a wider sweep so I can confirm you are bang on Refugee; well done.
I'm becoming more agile between laying full out under the hall floor and start/stopping the VFD from the remote controls in the garage. In basic terms what I needed was a voltage dropper? I'm used to these having restored many vintage radios so first thing I did was to attach a pair of short tails to one of the 8K2 resistors using solder.
I removed the cable from +10V on the VFD and connected one end of the resistor into the 10V terminal connecting the other end to the just released lead (Series). This I can understand and sure enough the result was a larger sweep of the wiper but still only giving half sweep which was a big improvement over a sixth sweep without resistor installed.
OK so now I had achieved half sweep at 10V with resistor installed; what if I connect to the 5V terminal on the VFD? I connected to the 5V terminal and great the pot was now giving full sweep at the required top speed of 3,000 rpm with about 10 degrees of dead pot from zero rpm which isn't much of a problem.
So now with all the information kindly supplied by you guys I've now got the answer to my original question and the lathe is fully usable.
I'm downright stubborn though and thinking about the results regarding the 1V = 1,000 rpm and both Nick and Peter saying the VFD should run without modification from the 10V with a 10K pot once again I lay under the hall floor and started to read the instruction manual doing a bit of key pressing having to keep moving between my prone uncomfortable position to standing in the garage to start/stop the lathe.
I knew something had caught my eye previously whilst reading the manual so I took my time reading through each parameter whilst I was growing colder and colder then I spotted it at PD070; Analog Input? This looked good to me so play around a bit; "0" it was set to was giving the current results; "1" increased the sweep and at this point it was still hooked up to 5V. "4" had a dramatic influence; the speed now dropped right back?
Then I thought the pot is giving a much reduced speed to previously and surely this is a step in the right direction and possibly a big breakthrough? I completely removed the resistor and reconnected the pot directly to 10V. What a huge improvement; previously with the current connections and 10K pot into 10V I could only achieve one sixth sweep now with PD070 set at "4" the pot is giving a good half sweep?
I think this result proves the problem to be associated with parameter adjustments and what a positive result for a change?
At this point I simply had to quit as I was by now feeling frozen but I'm now very optimistic about getting this VFD set up as intended by the manufacturer; what a pity though Huanyang are so backwards at coming forwards with information to save all the hours so far put in by me and of course all you guys who are trying your best to help me out which I can't thank you all enough for.
Perhaps PD070 isn't the correct parameter to adjust to achieve the result I'm after but it's only a matter of time before I do stumble upon the answer; PD070 however is a positive step in the right direction; how many more steps to take yet?
I'll spend more time reading the manual looking for "analog" or anything to do with remote controls; the answer is there I just need to identify it?
Any ideas on this new information are still most welcome and I'm pleased this problem has generated so much interest; it's even electrical unlike my usual chimney building or tree felling activities.
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
