Here is a list of all the postings Les Jones 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Faulty LED|
Are you sure that the socket for the tail light and the stop light are the same ? Some car bulbs are single centre contact. On these the connections are the single centre contact and the outer metal. The other type are small bayonet type and they have two have two contacts. The outer metal is not used as a connection on that type. There also combined stop and tail lights that use two contacts and the metal casing but you do not seem to have any of that type.
|Thread: pc based dro|
There is a design that uses and android tablet which sound like what you want to do using a PC. I think the same basic idea could be used on a PC if you want to write the software. It was done many years ago with the "Yadro" DRO. This used a PC running DOS rather than Windows or linux. This is a link to the DRO running on an Android tablet.
|Thread: Universal T milling machine from Chester : Issue with Starting|
Did you get 24 volts AC on the secondary of the 24 volt control transformer and the coil of KM1 ?
First check that you have 24 volts AC on the secondary of of the 24 volt control transformer. I think it is the one at the top right of the control box. I can't see the labels clearly so can you take a properly focused picture (Or pictures.) of the control box with your camera pointing straight at it. (Not looking down at an angle as in your picture in your first post.) If you have 24 volts on the output of the transformer then check if you have 24 volts AC across the coil of KM1. (This contactor should be closed except when the emergency stop button is pressed.)
|Thread: Power Feed on Bridgeport not working.|
Here is the schematic.
Here is a link to a post on another forum that is related to an Erskine power feed. It contains a schematic which should help tracing the problem. You may have to join the forum to view all of the information. If that is the case let me know and I will post the schematic here.
Edited By Les Jones 1 on 23/06/2019 08:58:32
|Thread: DIY magnetic DRO|
|Thread: DRO Z-Axis /4th axis "combiner"|
Code intended for an arduino nano with the following wiring:
The only other connections will be the power to the Arduino.
You will have to make sure that the signal level from the scales is the same as the signal levels on the version of Arduino that you use'
Edited By Les Jones 1 on 27/04/2019 08:42:47
Edited By Les Jones 1 on 27/04/2019 08:43:14
I built a similar device many years ago for my Seig X3 mill and find it very useful. Mine works with the original Chinese scales (2 x 24 bit protocol). Mine is based on a Pic16f628 with a 4 line by 20 LCD display, It displays the reading from each scale and the sum of the readings.
|Thread: edm machines|
I have built an EDM machine based on the bits of information I could find on the web about Ben Fleming's design. It is the capacitor discharge version as I could not fined enough information on his pulse version. (I was too mean to buy his books.) It works quite well.
|Thread: Crabtree B15 3 phase Stop / Start switch|
Edited By Les Jones 1 on 17/02/2019 14:34:14
I don't see the point of of trying to use this starter on the input of the VFD. If you want to put an emergency stop button on the input to the VFD such as this one will be easier than trying to modify your existing 415 volt starter. The start and stop buttons will be connected to the low voltage control terminals on the VFD. (Some VFDs may require a small low voltage 12 or 24 volts relay as well as the two buttons)
Edited By Les Jones 1 on 16/02/2019 20:08:43
Edited By Les Jones 1 on 16/02/2019 20:09:50
|Thread: Problems with NVR switch|
The lamp should be connected to L1 and L3 which are the two phases that feed the solenoid. I think you should put some markers on both ends of each of the red wires so you know which are the real phases and which is the ghost phase.
If the light only works when the machine is running I think you have it wired to the output side of the contactor . (The side connected to the motor.) The incoming three phase from the static converter should be connected to the three lower connections (L1, L2, L3) and the motor connected to the three top connections. (A, B, C) If you have it connected with the incoming three phase to the top three terminals I don't see how it could have worked as there would be no power (From L1 & L3.) to power the solenoid. Can you post a diagram of how you have connected it showing which terminals are connected to the three phase from the static converter, which terminals are connected to the motor and how you have connected the start and stop buttons ? (I can't see any wires that look like they go to the start and stop buttons.
Is there a transformer between where the black cable comes out of the bottom right hand gland of the NVR and the lamp ? I think it is very unlikely that the bulb runs directly of 400 volts. (I am making the assumption that the static converter contains a 240 volt to 400 volt transformer and the motor is wired in star configuration for 400 volts phase to phase and not in delta configuration for 240 volts phase to phase.)
I suspect that a thermal overload has tripped and needs resetting.The round knob on the right looks like it could be to set the thermal overload trip current. I expect there to be something in that area that needs resetting. I would also suggest measuring the resistance of the solenoid coil in case it has gone open circuit. (I am thinking it could be a 240 volt coil which is intended to be powered between a phase and neutral but has been connected to be powered between phases.) You could also check that all safety interlock switches are closed and that the stop buton is not open circuit. (The stop button will be normally closed contact that opens when pressed.)
Edited By Les Jones 1 on 14/02/2019 18:28:10
|Thread: Telephone / Internet Scams|
Update on the scam call I had on 13/02/19.
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