40. Lars - 2011-02-14 00:56:23|
Thank you for the very quick response tyo my e-mail.
When I turn the speed control into the speed range the nise is gone but the motor doesn´t start.
I have had contact with the Sieg Co and the engeneer gave me the same advice. "Change the relay" he thought it would be possible to find such a relay in Sweden. I will try to get these relays now.
Thank you for the advice.
I will inform You about the result
39. Eugene and Lars - 2011-02-13 03:14:53|
I have seen a similar problem . Are you saying that motor controller is working fine and the only thing that is bothering you is the noise From relays? If that is the case I would say that your problem is a Relay. You might have to replace the relay on the board. What happens is when power travel through contacts of a relay the copper contacts spark. In the perfect world designer of the controller need to put a capacitor in his design to compensate for the sparking but this motor controller does not have that in it. Sow contacts in the relay spark and eventually carbon film accumulates on the contacts. That is when its starts humming. ( Poor contact makes it hum and overheat). I would recommend Replacing the relays. You can get them on Ebay from China ( Item # 250639479603). Try this It should help with your problem. Let me know if it did. Good Luck .
P.S. The lamp is connected instead of motor to the same connections. ( in the video)
Date; Sun, 13 Feb 2011 01;35;55 +0100
Subject; C2 Lathe Speed control
Dear Mr Romanenco.
Since October 2000 I am owner of a Mini-Lathe. Probably a Sieg C2, with the PC-Board FC 250 J.
I have now trouble with the speed control.
Contact with the Arc Euro Trade gave me your homepage address.
I have been looking at your troubleshooting video and I will try to test the optocopler and the Mosfet transistors. You didnÂ´t say how to connect the bulb but I guess it must be in the motor cable.
I have also been looking at the PC-Board FC 250 J in the AETÂ´s C2 spare parts, but this is of a different layout. It might be so because my lathe is over ten years old. I would like to know if I can use this without new problem. If my attempt to repair the pc.board shouldnÂ´t work.
The problem I have with the Speed control is as follows;
When I put the power on by the Emergency Stop Swtch, the Forward/Stop/ Revers Switch in positiion "Forward" (or "Revers") but the Speed Control Knob in "off" position, I can hear some noise or clatter. It seems to come from a relay in a fast on/off/on/off....switching, but when I turn the speed control knob into the speed range the clatter isnÂ´t there anymore. To me this lookes completely wrong as the clatter starts when the speed controll is in the OFF position and not in the "Speed" range. There isnÂ´t anything wrong with the bridge rectifier. I have made a check on this.
If you have any idea how to get rid of the noise and be able to run yhe lathe again. Do you know if I can use AETÂ´s FC250J pc-board in spite of the difference in the design.
I am eager to get the lathe in runing condition again as I have some projects waiting.
S-194 35 Upplands Vasby
38. Eugene - 2011-01-20 21:07:33|
|Hello Hactor!!! I am Glad my web page is helping people. Usually when motor runs on one speed that indicates that Mosfet Transistor(‘s) need to be replaced. I don’t know how many Mosfets you have. Usually there are 2 of them on the board and both of them need to be replaced to correct the problem. Make sure you follow the guidelines of handling Misfit’s when you solder them. Mosfets are temperature sensitive and static sensitive. It is very easy to overheat them and damage them with static electricity. If you want me to fix it for you; You can ship the board to me and I will give you an estimate. Please let me know If you decide to ship it to me I will provide you with a shipping address.
37. Hector Sanchez - 2011-01-20 20:56:37|
|THANK YOU FOR ALL THE INFORMATION THAT YOU OFFER FREE TO ALL OF US WHO HAVE TROUBLE WITH THE SPEED CONTROL BOARD!; YOUR "SABEE" IS VERY
HELPFUL TO ALL ON THE WEB.
I WOULD LIKE TO KNOW WHAT I SHOULD BE LOOKING ON MY BOARD FOR POSSIBLE DEFECT; THE POTENTIOMETER WILL NOT RESPOND.
THE MOTOR RUN ON ONE SPEED ONLY.
I EXCHANGE IT TO OTHER LATHE THAT I USE AT WORK, AND THE POT. ACTS THE SAME WAY.
MY CONTROL BOARD IS DIFFERENT FROM YOUR PICTURES,THE MODEL NUMBER IS;
WHAT WILL IT COST ME FOR YOU TO REPAIR IT, IF I SEND IT TO YOU?; OR CAN YOU TELL ME WHAT SHOULD I BE CHECKING IN THIS BOARD?
I HAVE SOME KNOWLEDGE ON P.C. BOARDS; I AM A RETIRED INDUSTRIAL SEWING MACHINE MECHANIC .
36. Eugene Romanenko - 2010-11-22 20:54:15|
|Thank you William!!!!
I am glad that information is useful to you. I hope you will be able to fix your lathe. If you have any specific questions I might be able to answer them.
35. William - 2010-11-22 18:42:48|
|THANK YOU VERY MUCH FOR SUPPLYING THIS INFORMATION. What otherwise is a neat lathe falls short on its electronic design or quality in my opinion. I have been having a years worth of frustration ever since I bought the thing (after shutting down after only five minutes of initial use - Harbor freight said I was out of luck due to waiting for the expiration of its warranty. Bought on sale and waited to set-up after building my bench). You have cleared a lot of the fog out of the way. ANYWAY JUST WANTED TO SAY THANK YOU FOR YOUR HELP. EXCELLENT!! |
34. Eugene Romanenko - 2010-10-22 19:14:04|
|Hello Dan!!! No problem!!! If you feel confident trying to fix it yourself you can try replacing Mosfit transistors. Most likely this is the problem with your board. If not you can ship the board to me and I can fix it for you. If you decide that you are going to send the board to me then send me an email () and I will provide you with my address and other important information.
Good Luck to you
33. Dan - 2010-10-22 16:30:42|
|GOOD MORNING EUGENE FOUND YOUR SITE AND LIKE WHAT I SEE. NOT SURE IF YOU CAN HELP ME ,I HAVE A CRAFTEX MINI LATHE CJ9516 7"X8" MY PROBLEM IS WHEN I TURN THE POWER ON THE LATHE STARTS BEFORE I TOUCH THE START BUTTON AND IT GOES TO FULL SPEED THE VARIABLE SPEED CONTROL HAS NO EFFECT . MY QUESTION FOR YOU SIR IS IT POSSIBLE TO SHIP THE CONTROL BOARD TO YOU FOR REPAIR. I WOULD PAY FOR YOUR TIME PLUS SHIPPING COSTS .NOT SURE WHERE YOU LIVE I AM IN ONTARIO OR MAYBE YOU COULD POINT ME IN THE RIGHT DIRECTION FOR REPAIRS THANKS DAN|
32. Eugene Romanenko - 2010-09-22 02:14:11|
|Hello Jim!!! See That is exactly the problem. I was right. Controller is Programmed to turn off if the motor is not encountering resistance. I would do the research and find out if maybe there is potentiometer on the controller( computer) board that you can adjust the torque requirement ( Torque or Resistance Regulator). If that is not possible then you might going to have to create a counter shaft or (another pulley) with a mechanical torsion regulator to accommodate sufficient resistance for the controller(computer) to stay running. But in reality you are better off with the original motor and factory controller. If the original controller in your lathe is not powerful enough for you, then you can replace the controller with FC350BJ/110V and motor for 350 Watts from the Chinese Mini Mill. This unit is 350 Watts. Most likely it’s going to be tolerable amount of power for your application.
31. - 2010-09-22 00:31:14|
|thanks for the info.. is there anything i can do or change to over come this problem? bye the way,the motor comes on fine if i hold the shaft. Jim|