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Re: Troubleshooting Dead unit
LOL. Been there, done that! Glad it was simple! On Oct 29, 2024, at 7:46?PM, Richard Ferguson via groups.io <richardferguson3.14@...> wrote:
I want to thank everyone for their suggestions, which seemed particularly good.? I was able to print out the schematic, thanks.
?
I started trying to measure voltage on the control board.? Nothing.? ?I could not even see voltage on the AC line......? That is when I checked, and found that the extension cord that the lathe was plugged into had become unplugged somehow.? I had been using that extension cord to power a bandsaw earlier in the day, so I assumed that it was still plugged in.? An embarrassingly simple solution.? ?I know perfectly well that when something is not working, I should first check power, AC or battery.
?
Thanks to all,
Richard
--?
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
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Re: Troubleshooting Dead unit
As a retired I.T. Professional my goto is to usually ask that but sometimes it can come off as sarcastic or rude to ask the universal question (actually there are 2; is it plugged in and did you turn it off then on?) . I'm glad it was a simple fix.?
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Re: Troubleshooting Dead unit
I spent the best part of an hour pulling my “dead” laser cutter apart before realising I’d forgotten to turn the emergency switch back on. ? We all have brain fades occasionally.? At least it’s funny afterwards, ? Tony ? ?
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From: [email protected] <[email protected]> On Behalf Of Arthur Coe via groups.io
Sent: Wednesday, 30 October 2024 4:02 PM
To: [email protected]
Subject: Re: [7x12MiniLathe] Troubleshooting Dead unit? That makes me feel better for my experience of thinking my lathe was dead - only to realize I had activated the emergency shut-off switch. I want to thank everyone for their suggestions, which seemed particularly good.? I was able to print out the schematic, thanks. I started trying to measure voltage on the control board.? Nothing.? ?I could not even see voltage on the AC line......? That is when I checked, and found that the extension cord that the lathe was plugged into had become unplugged somehow.? I had been using that extension cord to power a bandsaw earlier in the day, so I assumed that it was still plugged in.? An embarrassingly simple solution.? ?I know perfectly well that when something is not working, I should first check power, AC or battery.
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Re: Troubleshooting Dead unit
That makes me feel better for my experience of thinking my lathe was dead - only to realize I had activated the emergency shut-off switch.
On Tuesday, October 29, 2024 at 07:46:58 PM PDT, Richard Ferguson via groups.io <richardferguson3.14@...> wrote:
I want to thank everyone for their suggestions, which seemed particularly good.? I was able to print out the schematic, thanks.
?
I started trying to measure voltage on the control board.? Nothing.? ?I could not even see voltage on the AC line......? That is when I checked, and found that the extension cord that the lathe was plugged into had become unplugged somehow.? I had been using that extension cord to power a bandsaw earlier in the day, so I assumed that it was still plugged in.? An embarrassingly simple solution.? ?I know perfectly well that when something is not working, I should first check power, AC or battery.
?
Thanks to all,
Richard
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Re: Troubleshooting Dead unit
I wouldn't be too embarrassed.? That sort of thing happens to most everybody.? And if not, it is because they never DO anything.? And even though a simple fix, it helped to go through some steps and then you got there.
I was once testing a very high impedance op amp amplifier circuit I was designing and was getting all sort of noise.? I checked all sorts of things.? Checked that the oscilloscope was isolated.? Everything.? Was at it a couple of hours.? Then I realized I had not turned on the power supply to the board.? With no power, my circuit was basically just being an antenna.
The GOOD news is that there was no electronic issue with your lathe - this time.? But with a schematic now, you will be better prepared if some issue does arise.
Charles E. "Chuck" Kinzer
On Tuesday, October 29, 2024 at 07:46:58 PM PDT, Richard Ferguson via groups.io <richardferguson3.14@...> wrote:
I want to thank everyone for their suggestions, which seemed particularly good.? I was able to print out the schematic, thanks.
?
I started trying to measure voltage on the control board.? Nothing.? ?I could not even see voltage on the AC line......? That is when I checked, and found that the extension cord that the lathe was plugged into had become unplugged somehow.? I had been using that extension cord to power a bandsaw earlier in the day, so I assumed that it was still plugged in.? An embarrassingly simple solution.? ?I know perfectly well that when something is not working, I should first check power, AC or battery.
?
Thanks to all,
Richard
|
Re: Troubleshooting Dead unit
I want to thank everyone for their suggestions, which seemed particularly good.? I was able to print out the schematic, thanks.
?
I started trying to measure voltage on the control board.? Nothing.? ?I could not even see voltage on the AC line......? That is when I checked, and found that the extension cord that the lathe was plugged into had become unplugged somehow.? I had been using that extension cord to power a bandsaw earlier in the day, so I assumed that it was still plugged in.? An embarrassingly simple solution.? ?I know perfectly well that when something is not working, I should first check power, AC or battery.
?
Thanks to all,
Richard
|
Re: Troubleshooting Dead unit
LMS also has a good troubleshooting guide:
?
?< >
?
Having? said that, a close visual inspection is always a good first step. Look for things like disconnected connectors, foreign objects, broken and/or pinched wires.
?
Roy
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Re: Troubleshooting Dead unit
Had a similar problem with my 7x11 and track it down to the connection to the carbon brush. Good luck
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Re: Troubleshooting Dead unit
How far did you check power?? As in, is the control board even getting power (past the fuse, mag switch, e-switch)?? A VOM is certainly your friend here and even beyond that a scope isn't necessary.? Also, do you switch directions with the lathe powered up?? ?
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Re: Troubleshooting Dead unit
And this site has more detailed info on the (probable) ?controller board, but honestly, unless you’re adept at repairing complex electronics, if it’s the board, getting a new one is the easiest bet.
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On Oct 29, 2024, at 1:42?PM, Bruce J via groups.io <bruce.desertrat@...> wrote:
LMS has wiring diagrams; one will probably match your lathe.
On Oct 29, 2024, at 1:08?PM, Richard Ferguson via groups.io <richardferguson3.14@...> wrote:
My 7x12 Northern Mini-lathe has suddenly quit working.? Previously, when I flipped the switch from forward to reverse I heard relays click.? Now nothing.? The fuse tested good.? I did not see any evidence of burnt parts.? ?
?
I know something about electronics, but it is hard to proceed without a wiring diagram.? I do not have an oscilloscope, but I have a VOM.? I would hate to replace the control board, only to find that the problem is elsewhere......? I looked online, but did not find anything relevant.
?
?
Richard
--?
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
--?
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
Re: Troubleshooting Dead unit
LMS has wiring diagrams; one will probably match your lathe.
|
On Oct 29, 2024, at 1:08?PM, Richard Ferguson via groups.io <richardferguson3.14@...> wrote:
My 7x12 Northern Mini-lathe has suddenly quit working.? Previously, when I flipped the switch from forward to reverse I heard relays click.? Now nothing.? The fuse tested good.? I did not see any evidence of burnt parts.? ?
?
I know something about electronics, but it is hard to proceed without a wiring diagram.? I do not have an oscilloscope, but I have a VOM.? I would hate to replace the control board, only to find that the problem is elsewhere......? I looked online, but did not find anything relevant.
?
?
Richard
--?
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
Troubleshooting Dead unit
My 7x12 Northern Mini-lathe has suddenly quit working.? Previously, when I flipped the switch from forward to reverse I heard relays click.? Now nothing.? The fuse tested good.? I did not see any evidence of burnt parts.? ?
?
I know something about electronics, but it is hard to proceed without a wiring diagram.? I do not have an oscilloscope, but I have a VOM.? I would hate to replace the control board, only to find that the problem is elsewhere......? I looked online, but did not find anything relevant.
?
?
Richard
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Re: SAFETY <<< WAS: RE: [7x12MiniLathe] Mounting PVC Fitting for Boring
Lots of interesting ideas.? I'm particularly interested in working with heating the PVC for future projects.??
In this case, using the PVC coupling, once it was mounted and centered it literally took only 3-4 passes (on each side) with the boring tool in the lathe to zero in on the tapered fit I wanted.? The 90 degree fitting should progress in a similar manner once the mounting is solved.? Seems like that's the easiest solution.
I like the idea of mounting the 90 to a block that I can put in my 4-jaw chuck - I have some aluminum blocks that I had originally planned to use as tool holders that should do nicely.
On Sunday, October 27, 2024 at 11:06:45 PM PDT, Gerald Feldman <gfeldman2904@...> wrote:
Once again an e-mail string has fallen off its original subject and is wandering around aimlessly.? Can we please get back to the original subject of mounting a plastic elbow on a lathe or just stop if enough has been said? ? On the subject of safety, keep in mind that EVERYTHING we do, even breathing the air. carries some degree of risk. ?Machining equipment and the materials we use are inherently dangerous.? Our job is to understand and evaluate the risks, and to take appropriate actions to reduce the risks so that they will not cause us harm.? We do this by recognizing the risks and using APPROPRIATE Personal Protective Equipment (PPEs), procedures, and administrative controls to help keep us safe and off the Darwin Awards page.? ??? ? Jerry F. ?? ?
From: [email protected] [mailto:[email protected]] On Behalf Of Pierre-Raymond Rondelle via groups.io
Sent: Sunday, October 27, 2024 10:57 AM
To: [email protected]
Subject: Re: [7x12MiniLathe] Mounting PVC Fitting for Boring ? So, for those who have no common sense and who are so scared : please don't use nor drink water, whose scientific names are also di-hydrogen monoxide and mono-oxygen di-hydride.
It is well known as being very dangerous. Among the risks are : an excess can cause landslides, it dissolves rocks, perforates stone and metals, and also clouds the pastis. Drinking too much of it can lead to an edema.
That said, whatever the liquid, gas, or material is, always wear googles, use gloves put a breathing mask and avoid breathing the vapors or fumes. I assume that any adult would know this but, you're right, a reminder may be useful.
In addition, don't cross the streets. Finally lots of people die in their bed. A word of advice: don't go to bed. Keep sitting instead :-)
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Re: SAFETY <<< WAS: RE: [7x12MiniLathe] Mounting PVC Fitting for Boring
No need to have a ventriloquist on this forum !
Common sense. Full stop
On 28.10.24 07:06, Gerald Feldman via
groups.io wrote:
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SAFETY <<< WAS: RE: [7x12MiniLathe] Mounting PVC Fitting for Boring
Once again an e-mail string has fallen off its original subject and is wandering around aimlessly.? Can we please get back to the original subject of mounting a plastic elbow on a lathe or just stop if enough has been said? ? On the subject of safety, keep in mind that EVERYTHING we do, even breathing the air. carries some degree of risk. ?Machining equipment and the materials we use are inherently dangerous.? Our job is to understand and evaluate the risks, and to take appropriate actions to reduce the risks so that they will not cause us harm.? We do this by recognizing the risks and using APPROPRIATE Personal Protective Equipment (PPEs), procedures, and administrative controls to help keep us safe and off the Darwin Awards page.? ??? ? Jerry F. ?? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Pierre-Raymond Rondelle via groups.io
Sent: Sunday, October 27, 2024 10:57 AM
To: [email protected]
Subject: Re: [7x12MiniLathe] Mounting PVC Fitting for Boring? So, for those who have no common sense and who are so scared : please don't use nor drink water, whose scientific names are also di-hydrogen monoxide and mono-oxygen di-hydride.
It is well known as being very dangerous. Among the risks are : an excess can cause landslides, it dissolves rocks, perforates stone and metals, and also clouds the pastis. Drinking too much of it can lead to an edema.
That said, whatever the liquid, gas, or material is, always wear googles, use gloves put a breathing mask and avoid breathing the vapors or fumes. I assume that any adult would know this but, you're right, a reminder may be useful.
In addition, don't cross the streets. Finally lots of people die in their bed. A word of advice: don't go to bed. Keep sitting instead :-)
|
Re: Mounting PVC Fitting for Boring
So, for those who have no common sense and who are so scared :
please don't use nor drink water, whose scientific names are also
di-hydrogen monoxide and mono-oxygen di-hydride.
It is well known as being very dangerous. Among the risks are : an
excess can cause landslides, it dissolves rocks, perforates stone
and metals, and also clouds the pastis. Drinking too much of it can
lead to an edema.
That said, whatever the liquid, gas, or material is, always wear
googles, use gloves put a breathing mask and avoid breathing the
vapors or fumes. I assume that any adult would know this but, you're
right, a reminder may be useful.
In addition, don't cross the streets. Finally lots of people die in
their bed. A word of advice: don't go to bed. Keep sitting instead
:-)
|
Re: Mounting PVC Fitting for Boring
HCL?? Reads article… yup, HCL. ? Yeah, don’t heat up PVC so much where it goes past being all gooey, it releases chlorine (nasty stuff) that combines with water in the air to create hydrochloric acid.? Now breathing that isn’t too good for your lungs, but even worse it’ll make your lathe & other tools go rusty really quickly.? That’ll really upset you. ? Like most plastics PVC will start going soft at about 100C (boiling water temperatures), well below the stage where it’ll start outgassing and causing trouble. ? It’ll be fine. ? I once tried laser cutting polycarbonate.? It didn’t work, emitted a nasty looking yellow-brown smoke and made things go rusty, not recommended.? Yep, chlorine & HCL. ? Tony ? ?
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From: [email protected] <[email protected]> On Behalf Of mario mohl via groups.io
Sent: Monday, 28 October 2024 3:39 AM
To: [email protected]
Subject: Re: [7x12MiniLathe] Mounting PVC Fitting for Boring? An anecdote?? ?Wow !? ? At least READ what you post.??exposure to fumes from an overheated (362 degrees C) PVC extruding machine. Fear mongering, pure and simple. ? Not bull... we've had workers that had to be hospitalized due to heating
PVC.
Do what you want.? Not fear mongering.
On 10/27/2024 11:29 AM, mario mohl via wrote:
> Bull....
> Overheating / burning it is a problem you want to avoid for more and bigger
> reasons than some fumes.
>
> Heat it by immersion in boiling water.
>
> Ventilation is also welcome, always, for many reasons as well.
>
> So yeah, don't lock yourself up in an airtight room to burn some PVC. That
> would be just as stupid as it sounds.
>
> Be sensible, the rest is fearmongering.
>
> On Sun, Oct 27, 2024 at 9:06?AM WAM via <ajawam2=
> [email protected]> wrote:
>
>> Careful when heating PVC... It gives off nasty fumes
>>
>>
>>
>>
>> On 10/27/2024 7:00 AM, Pierre-Raymond Rondelle via wrote:
>>> I can confirm that Mario's method is an excellent one.
>>>
>>> In addition, if you want to restrain the diameter, use a glass jar into
>> you push
>>> the elbow in after hot air heating it. Don't use a flame, it may damage
>> the PVC
>>> and/or give a poor result. You also may turn a piece of metal tube at the
>>> required dimension. Keep in mind that in this case the metal tube shall
>> also be
>>> heated otherwise it will be difficult to restrain a plastic tube being
>> cooled by
>>> the cold tube during the operation.
>>>
>>> I used these two methods a lot of times and it always worked. If the
>> result
>>> isn't what you wanted, heat it again and it will almost recover its
>> original
>>> shape :-)
>>>
>>> It also works well on nylon tubing. I purchased 3/8" tube for my
>> compressed air
>>> distribution and it happened to be 10mm. My fittings were 3/8". Instead
>> of
>>> wasting time with a new order, I restrained the nylon tube using the
>> second
>>> method. No leak @ 8 bars for at least12 years.
>>>
>>>
>>> On 27.10.24 02:38, mario mohl via wrote:
>>>> Better still. Turn a wood dowel to the desired ID and use it to expand
>> the PVC
>>>> after slightly heating it
>>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
|
Re: Mounting PVC Fitting for Boring
An anecdote?? ?Wow !? ?
At least READ what you post.??exposure to fumes from an overheated (362 degrees C) PVC extruding machine.
Fear mongering, pure and simple.
Not bull... we've had workers that had to be hospitalized due to heating
PVC.
Do what you want.? Not fear mongering.
On 10/27/2024 11:29 AM, mario mohl via wrote:
> Bull....
> Overheating / burning it is a problem you want to avoid for more and bigger
> reasons than some fumes.
>
> Heat it by immersion in boiling water.
>
> Ventilation is also welcome, always, for many reasons as well.
>
> So yeah, don't lock yourself up in an airtight room to burn some PVC. That
> would be just as stupid as it sounds.
>
> Be sensible, the rest is fearmongering.
>
> On Sun, Oct 27, 2024 at 9:06?AM WAM via <ajawam2=
> [email protected]> wrote:
>
>> Careful when heating PVC... It gives off nasty fumes
>>
>>
>>
>>
>> On 10/27/2024 7:00 AM, Pierre-Raymond Rondelle via wrote:
>>> I can confirm that Mario's method is an excellent one.
>>>
>>> In addition, if you want to restrain the diameter, use a glass jar into
>> you push
>>> the elbow in after hot air heating it. Don't use a flame, it may damage
>> the PVC
>>> and/or give a poor result. You also may turn a piece of metal tube at the
>>> required dimension. Keep in mind that in this case the metal tube shall
>> also be
>>> heated otherwise it will be difficult to restrain a plastic tube being
>> cooled by
>>> the cold tube during the operation.
>>>
>>> I used these two methods a lot of times and it always worked. If the
>> result
>>> isn't what you wanted, heat it again and it will almost recover its
>> original
>>> shape :-)
>>>
>>> It also works well on nylon tubing. I purchased 3/8" tube for my
>> compressed air
>>> distribution and it happened to be 10mm. My fittings were 3/8". Instead
>> of
>>> wasting time with a new order, I restrained the nylon tube using the
>> second
>>> method. No leak @ 8 bars for at least12 years.
>>>
>>>
>>> On 27.10.24 02:38, mario mohl via wrote:
>>>> Better still. Turn a wood dowel to the desired ID and use it to expand
>> the PVC
>>>> after slightly heating it
>>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
|
Re: Mounting PVC Fitting for Boring
Not bull... we've had workers that had to be hospitalized due to heating PVC.
Do what you want.? Not fear mongering.
toggle quoted message
Show quoted text
On 10/27/2024 11:29 AM, mario mohl via groups.io wrote: Bull....
Overheating / burning it is a problem you want to avoid for more and bigger
reasons than some fumes.
Heat it by immersion in boiling water.
Ventilation is also welcome, always, for many reasons as well.
So yeah, don't lock yourself up in an airtight room to burn some PVC. That
would be just as stupid as it sounds.
Be sensible, the rest is fearmongering.
On Sun, Oct 27, 2024 at 9:06?AM WAM via groups.io <ajawam2=
[email protected]> wrote:
Careful when heating PVC... It gives off nasty fumes
On 10/27/2024 7:00 AM, Pierre-Raymond Rondelle via groups.io wrote:
I can confirm that Mario's method is an excellent one.
In addition, if you want to restrain the diameter, use a glass jar into you push
the elbow in after hot air heating it. Don't use a flame, it may damage the PVC
and/or give a poor result. You also may turn a piece of metal tube at the
required dimension. Keep in mind that in this case the metal tube shall also be
heated otherwise it will be difficult to restrain a plastic tube being cooled by
the cold tube during the operation.
I used these two methods a lot of times and it always worked. If the result
isn't what you wanted, heat it again and it will almost recover its original
shape :-)
It also works well on nylon tubing. I purchased 3/8" tube for my compressed air
distribution and it happened to be 10mm. My fittings were 3/8". Instead of
wasting time with a new order, I restrained the nylon tube using the second
method. No leak @ 8 bars for at least12 years.
On 27.10.24 02:38, mario mohl via groups.io wrote:
Better still. Turn a wood dowel to the desired ID and use it to expand the PVC
after slightly heating it
|
Re: Mounting PVC Fitting for Boring
Bull.... Overheating / burning it is a problem you want to avoid for more and bigger reasons than some fumes.
Heat it by immersion in boiling water.
Ventilation is also welcome, always, for many reasons as well.
So yeah, don't lock yourself up in an airtight room to burn some PVC. That would be just as stupid as it sounds.
Be sensible, the rest is fearmongering.
Careful when heating PVC... It gives off nasty fumes
On 10/27/2024 7:00 AM, Pierre-Raymond Rondelle via wrote:
> I can confirm that Mario's method is an excellent one.
>
> In addition, if you want to restrain the diameter, use a glass jar into you push
> the elbow in after hot air heating it. Don't use a flame, it may damage the PVC
> and/or give a poor result. You also may turn a piece of metal tube at the
> required dimension. Keep in mind that in this case the metal tube shall also be
> heated otherwise it will be difficult to restrain a plastic tube being cooled by
> the cold tube during the operation.
>
> I used these two methods a lot of times and it always worked. If the result
> isn't what you wanted, heat it again and it will almost recover its original
> shape :-)
>
> It also works well on nylon tubing. I purchased 3/8" tube for my compressed air
> distribution and it happened to be 10mm. My fittings were 3/8". Instead of
> wasting time with a new order, I restrained the nylon tube using the second
> method. No leak @ 8 bars for at least12 years.
>
>
> On 27.10.24 02:38, mario mohl via wrote:
> > Better still. Turn a wood dowel to the desired ID and use it to expand the PVC
> > after slightly heating it
>
>
|
