Hi Gene,
I found that site a while back, very useful.? The calipers they show are the very cheap ones which, I believe, have a different output format and are usually 1.5v.? The caliper I'm intending to use copies a Mitutoyo item in both operation and output (think it's called Digimatic SPC or similar). I've played with using the cheap ones but have settled on this 3v version for the exact reasons you're suggesting.
The idea is a little different to the usual TouchDRO arrangement in that the MKR wifi 1010 will be located at the back of the lathe saddle as will the caliper pcb and the Z scale reading head.? The whole lot will be powered by a Lipo battery attached to the Arduino board which has a Lipo charging facility.
By this arrangement, assuming it all works, there will be no wires from the lathe to the tablet as the connection is via BT.? The only time a wire needs to be attached is when the battery is charging and this will be whilst the lathe isn't being used.
I had already powered the caliper from the Arduino output prior to my first post, so was fairly confident the data connection would work.? But with my level of electronics knowledge, it's nice to have some reassurance for experts.
?
|
Hey Julian,
Are you planning to keep using the battery in the caliper? Wouldn't it be possible to hook up power from Arduino to supply the caliper with power, getting rid of the battery?
A fresh 3 V (nominal) button cell (e.g. CR2032) may easily measure at up to 3.5 V (no-load) when you first unpack it. I'm reasonably sure a caliper would work fine on a 3.3 V power supply.
I don't know if these links will be of any use to you, but here they are:
Caliper2PC is an interface box for connecting various kinds of linear encoders. I guess it first started off in a similar way as what you're doing now, but by now it supports all kinds of encoders: TTL/quadrature signal glass scales, magnetic scales, rotary encoders, iGaging scales, various kinds of calipers, Mitutoyo Digimatic calipers and indicators, even analog sensors. The author is pretty responsive and helpful, perhaps you might want to discuss with him what you're doing, maybe he could give some helpful tips. I personally have two of these Caliper2PC boxes, one for the lathe and for the mill. I'm using a couple of second-hand Thinkpad X230t 12.5" convertible laptops/tablets as displays.
Keep us posted on your experiments.
Best regards,
Gene
|
Happy to help!
That's not too bad a plug - isn't fun working with such small wires?
Thinking this through - since you have said there is a 3.3v and 3v supply, looking at the Atmel datasheet for Voh and it is probably ok. There looks to be about 0.7v drop max at 5ma Ioh so that is 0.7v/5ma=140 ohms as the highest resistance of the pullup fet and 0.3v/10ma worst case 0.3v/10ma=30 ohms. 140 ohms and 30 ohms is too much a variation, process control looks to be less of that range... Anyway if you put a small resistor (> 10 ohms) in series of the REQ and Arduino pin, you can measure the current and see how much it is. Why might this be important? There might be current flowing from the caliper REQ pin (from the caliper battery) into the Arduino.which would reduce the battery life of the caliper battery.
I am interested in seeing your progress...
On Sun, Jul 24, 2022 at 3:25 PM Julian < julian@...> wrote: Buffalo John, thanks for your reassurance.? I changed the sketch to make the "req" pin normally high and change to low,? hooked up the wiring and amazingly it worked, subject to some adjustments to my rather badly homemade plug for the caliper connection ... don't laugh!
Thanks for pointing it out, I'd forgotten that the Arduino board used 3.3v where as the caliper battery was 3v, but I decided to press ahead anyway ... so far no small mushroom clouds.
John (Lindo) I've had TouchDRO on my mill for years and it transformed the machine.? I've never used a lathe with a readout and I'm hoping it will make a similar difference to the Myford.
The test tonight has proved things will work electronically I now have to graft the caliper pcb and magnetic tape under the cross slide.? If there's interest on here I'll be happy to post progress, but don't hold your breath!
?
--
Buffalo John
|
Buffalo John, thanks for your reassurance.? I changed the sketch to make the "req" pin normally high and change to low,? hooked up the wiring and amazingly it worked, subject to some adjustments to my rather badly homemade plug for the caliper connection ... don't laugh!  Thanks for pointing it out, I'd forgotten that the Arduino board used 3.3v where as the caliper battery was 3v, but I decided to press ahead anyway ... so far no small mushroom clouds. John (Lindo) I've had TouchDRO on my mill for years and it transformed the machine.? I've never used a lathe with a readout and I'm hoping it will make a similar difference to the Myford. The test tonight has proved things will work electronically I now have to graft the caliper pcb and magnetic tape under the cross slide.? If there's interest on here I'll be happy to post progress, but don't hold your breath! ?
|
Hi Julian, nice to hear from you. Mini lathes are always difficult to add on mods due to space constraints. I cheated and used I gaging scales for reading Z saddle movement? and X for cross slide move. By fitting ELS, or RELS, this gives the benefit of removing the compound slide,? basically a redundant slide. This gave me room to connect the scale, the readouts are typical stack. Scales are relatively cheap to buy. I also use on my mill, 3 scales X Y Z , the wires? are attached to a Blu box, and to a Samsung tablet with Yuris app, I have had good success? for 6 years and never let me down. Naturally the LCD? diplays with the scale purchase become redundant I particularly like the hole position calculations that Yuri put into his program.
Admire you making your own, and keep us all up to speed of progress. Regards John
toggle quoted message
Show quoted text
-------- Original message -------- From: Julian <julian@...> Date: 21/07/2022 19:21 (GMT+01:00) Subject: [digitalhobbyist] Lathe DRO #DRO
Hi all,
?
Been a bit quiet on here for a while, hope everyone is well.
?
I thought I’d wake things up a bit by asking some dumb questions about a project I’m currently working on where my knowledge of digital electronics is woefully lacking.
?
I’m trying to add a digital readout to my lathe.? Nothing too ground breaking, as having spent several months playing with rotary encoders to no avail I have reverted back to the idea of using magnetic scales ultimately connected to TouchDRO.
?
I’m intending to use a digital caliper, dismantled to just the PCB and magnetic tape grafted under the cross slide as an attempt to overcome the space issues encountered when fitting a DRO to a small lathe.
?
My mate Mark has perfected getting an Arduino mkr wifi 1010, which operates at 3v, to run standard blue tooth and I’ve found a Chinese caliper also running at 3v claimed to be good measuring down to 5 microns.? It’s a 150mm caliper and the full travel on the Myfords cross slide is 140mm so it should work out OK.
?
I’ve found a sketch and circuit diagram on line where a chap is reading a 1.5v Mitutoyo indicator using an Arduino Nano.
?
This is the circuit diagram he gives …
?
?
?
The indicator requires a request signal before it will send data and he does this via the transistor.? I assume he uses a transistor to pull the REQ pin low because of the different voltages of the indicator and Nano, 1.5v and 5v.? ?I’m not sure how the Nano sees the 1.5v high from the indicator as high on the data and clock pins unless he’s done something fancy in the Arduino code.
?
Anyway that shouldn’t effect what I’m trying to do.? My question is ... as I have a 3v Arduino and a 3v calliper can I just hold pin 5 on the Arduino high and set it low when I want data sent, and do away with the resistor or transistor?
?
Appreciate any assistance provided it’s phrased in terms a 5 year old can understand!
-- John
|
|
|
The 2N2222 is a general purpose NPN transistor and the usage here would certainly be voltage translation.
However - is there a pullup resistor on the REQ pin? This can be checked with a volt meter between REQ and GND. If you don't see a voltage on REQ, a pullup resistor is needed.
If there is a voltage, measure the voltage after you write a 1 to the D5 pin on the CPU. Then the REQ should go to close to ground. If it is above Vil (Voltage Input Low) of the? then that means there is not enough drive on the transistor - so you need to check the B (base) pin of the transistor.
You asked if you can connect D5 to REQ. If both are the same voltage, probably. However, 3.0v and 3.3v might not be compatible, so check that 3v is not 3.3v. If you are satisfied the voltages are the same, do the voltage checks on the REQ pin to verify it works.
Also note that the transistor is acting, which you seem to understand, but I am noting it for others who might be curious.
On Thu, Jul 21, 2022 at 10:21 AM Julian < julian@...> wrote: Hi all,
?
Been a bit quiet on here for a while, hope everyone is well.
?
I thought I’d wake things up a bit by asking some dumb questions about a project I’m currently working on where my knowledge of digital electronics is woefully lacking.
?
I’m trying to add a digital readout to my lathe.? Nothing too ground breaking, as having spent several months playing with rotary encoders to no avail I have reverted back to the idea of using magnetic scales ultimately connected to TouchDRO.
?
I’m intending to use a digital caliper, dismantled to just the PCB and magnetic tape grafted under the cross slide as an attempt to overcome the space issues encountered when fitting a DRO to a small lathe.
?
My mate Mark has perfected getting an Arduino mkr wifi 1010, which operates at 3v, to run standard blue tooth and I’ve found a Chinese caliper also running at 3v claimed to be good measuring down to 5 microns.? It’s a 150mm caliper and the full travel on the Myfords cross slide is 140mm so it should work out OK.
?
I’ve found a sketch and circuit diagram on line where a chap is reading a 1.5v Mitutoyo indicator using an Arduino Nano.
?
This is the circuit diagram he gives …
?
?
?
The indicator requires a request signal before it will send data and he does this via the transistor.? I assume he uses a transistor to pull the REQ pin low because of the different voltages of the indicator and Nano, 1.5v and 5v.? ?I’m not sure how the Nano sees the 1.5v high from the indicator as high on the data and clock pins unless he’s done something fancy in the Arduino code.
?
Anyway that shouldn’t effect what I’m trying to do.? My question is ... as I have a 3v Arduino and a 3v calliper can I just hold pin 5 on the Arduino high and set it low when I want data sent, and do away with the resistor or transistor?
?
Appreciate any assistance provided it’s phrased in terms a 5 year old can understand!
--
Buffalo John
|
Thanks for the prompt reply, Mike.? But it's not really a TouchDRO issue.
All I want to do for the time being is get numbers to the Arduino serial monitor to check the two will talk.
After that Mark (hope you're reading this, Mark) can easily modify the sketch to drive TouchDRO via BT.
|
??? ??? Julian , ,I can't answer your question , but maybe you
might try asking over on the Touch DRO forum over t Yuri's toys .
??? ??? good luck
??? ??? animal
On 7/21/2022 10:21 AM, Julian wrote:
toggle quoted message
Show quoted text
Hi all,
?
Been a bit quiet on here for a while, hope everyone is well.
?
I thought I’d wake things up a bit by asking some dumb
questions about a project I’m currently working on where my
knowledge of digital electronics is woefully lacking.
?
I’m trying to add a digital readout to my lathe.? Nothing too
ground breaking, as having spent several months playing with
rotary encoders to no avail I have reverted back to the idea of
using magnetic scales ultimately connected to TouchDRO.
?
I’m intending to use a digital caliper, dismantled to just
the PCB and magnetic tape grafted under the cross slide as an
attempt to overcome the space issues encountered when fitting a
DRO to a small lathe.
?
My mate Mark has perfected getting an Arduino mkr wifi 1010,
which operates at 3v, to run standard blue tooth and I’ve found
a Chinese caliper also running at 3v claimed to be good
measuring down to 5 microns.? It’s a 150mm caliper and the full
travel on the Myfords cross slide is 140mm so it should work out
OK.
?
I’ve found a sketch and circuit diagram on line where a chap
is reading a 1.5v Mitutoyo indicator using an Arduino Nano.
?
This is the circuit diagram he gives …
?
?
?
The indicator requires a request signal before it will send
data and he does this via the transistor.? I assume he uses a
transistor to pull the REQ pin low because of the different
voltages of the indicator and Nano, 1.5v and 5v.? ?I’m not sure
how the Nano sees the 1.5v high from the indicator as high on
the data and clock pins unless he’s done something fancy in the
Arduino code.
?
Anyway that shouldn’t effect what I’m trying to do.? My
question is ... as I have a 3v Arduino and a 3v calliper can I
just hold pin 5 on the Arduino high and set it low when I want
data sent, and do away with the resistor or transistor?
?
Appreciate any assistance provided it’s phrased in terms a 5
year old can understand!
|
Hi all,
?
Been a bit quiet on here for a while, hope everyone is well.
?
I thought I’d wake things up a bit by asking some dumb questions about a project I’m currently working on where my knowledge of digital electronics is woefully lacking.
?
I’m trying to add a digital readout to my lathe.? Nothing too ground breaking, as having spent several months playing with rotary encoders to no avail I have reverted back to the idea of using magnetic scales ultimately connected to TouchDRO.
?
I’m intending to use a digital caliper, dismantled to just the PCB and magnetic tape grafted under the cross slide as an attempt to overcome the space issues encountered when fitting a DRO to a small lathe.
?
My mate Mark has perfected getting an Arduino mkr wifi 1010, which operates at 3v, to run standard blue tooth and I’ve found a Chinese caliper also running at 3v claimed to be good measuring down to 5 microns.? It’s a 150mm caliper and the full travel on the Myfords cross slide is 140mm so it should work out OK.
?
I’ve found a sketch and circuit diagram on line where a chap is reading a 1.5v Mitutoyo indicator using an Arduino Nano.
?
This is the circuit diagram he gives …
?
?
?
The indicator requires a request signal before it will send data and he does this via the transistor.? I assume he uses a transistor to pull the REQ pin low because of the different voltages of the indicator and Nano, 1.5v and 5v.? ?I’m not sure how the Nano sees the 1.5v high from the indicator as high on the data and clock pins unless he’s done something fancy in the Arduino code.
?
Anyway that shouldn’t effect what I’m trying to do.? My question is ... as I have a 3v Arduino and a 3v calliper can I just hold pin 5 on the Arduino high and set it low when I want data sent, and do away with the resistor or transistor?
?
Appreciate any assistance provided it’s phrased in terms a 5 year old can understand!
|
Re: Can this DRO be used?
??? ??? Well hopefully you luck out , if not take it apart &
clean it again .
??? ??? animal
On 3/24/2022 2:38 PM, Prasad via
groups.io wrote:
toggle quoted message
Show quoted text
Mike
That is something new to me.
I just opened the scale and wiped it all clean. Now I have to
wait and see how reliable it is.?
Thanks for the idea
-Prasad
On Tuesday, March 22, 2022, 08:19:36 PM EDT, mike allen
<animal@...> wrote:
??? ??? Have you tried taking the scale apart &
cleaning it ?
??? ??? animal
On
3/22/2022 4:00 PM, Prasad via groups.io wrote:
Mike, Thanks and OK
I got the set of three iGaging scales
with EZ-DRO displays a few years ago and they worked
for a while but then one of the scales started
misbehaving. It is the Y scale - the 6 inches long
one that jumps. The display would suddenly jump by
an exact 0.2000" for no apparent reason and then
jump again and again. I have tried at least three
"cures" including adding an extra capacitor inside
each display unit to filter out the noise. The
jumping display has reduced but not disappeared.
Still happens randomly. The DRO is not my trusted
device currently.?
I wonder if that problem would still be
around with Yurys Toy TouchDRO. If that happens it
would be a waste of my money.?
-Prasad
On Tuesday, March 22, 2022, 06:27:09 PM EDT,
mike allen <animal@...>
wrote:
??? ??? then you should go with the Touch
DRO
. You need to buy the board that works with
your scales , the web site should tel you
which one you need & then you need a
tablet & your good to go .
??? ??? animal
On
3/22/2022 1:42 PM, Prasad via groups.io
wrote:
I just discovered that the
9-pin D connectors are meant to accept
glass scales.. I already have the iGaging
scales mounted on my mini-mill and I dont
want to start all over again with glass
scales,,
-Prasad
On Tuesday, March 22, 2022, 02:26:24
PM EDT, Prasad via groups.io <ad_prasad@...>
wrote:
Yeah, I looked at
its rear side view and it has 9
pin D style connectors which
appear to be meant for the
scales. I don't see any USB
connector for connecting
standard aluminum scales. It is
obviously meant for some
dedicated scales..?
-Prasad
On Tuesday, March 22,
2022, 10:03:48 AM EDT, Ralph
Hulslander <rhulslander@...>
wrote:
That looks
like it is just the
display. It does not
have any DRO units!
Ralph
While
browsing a link I
found this DRO
available on
Walmart.com. I don't
see any scales
associated with it.?
Any comments??
-Prasad
--
Clausing 8520, Craftsman
12x36 Lathe, 4x12 mini
lathe, 14" Delta drill
press, 40 watt laser,
Consew brushless DC motors
and a non working 3D
printer
|
Re: Can this DRO be used?
Mike
That is something new to me. I just opened the scale and wiped it all clean. Now I have to wait and see how reliable it is.?
Thanks for the idea -Prasad
On Tuesday, March 22, 2022, 08:19:36 PM EDT, mike allen <animal@...> wrote:
??? ??? Have you tried taking the scale apart & cleaning it ?
??? ??? animal
On 3/22/2022 4:00 PM, Prasad via
groups.io wrote:
Mike, Thanks and OK
I got the set of three
iGaging scales with EZ-DRO displays a few years ago and they
worked for a while but then one of the scales started
misbehaving. It is the Y scale - the 6 inches long one that
jumps. The display would suddenly jump by an exact 0.2000" for
no apparent reason and then jump again and again. I have tried
at least three "cures" including adding an extra capacitor
inside each display unit to filter out the noise. The jumping
display has reduced but not disappeared. Still happens
randomly. The DRO is not my trusted device currently.?
I wonder if that problem
would still be around with Yurys Toy TouchDRO. If that happens
it would be a waste of my money.?
-Prasad
On Tuesday, March 22, 2022, 06:27:09 PM EDT, mike allen
<animal@...> wrote:
??? ??? then you should go with the Touch DRO
. You need to buy the board that works with your
scales , the web site should tel you which one you
need & then you need a tablet & your good to
go .
??? ??? animal
On
3/22/2022 1:42 PM, Prasad via groups.io wrote:
I just discovered that the 9-pin D
connectors are meant to accept glass scales.. I
already have the iGaging scales mounted on my
mini-mill and I dont want to start all over again
with glass scales,,
-Prasad
On Tuesday, March 22, 2022, 02:26:24 PM EDT,
Prasad via groups.io <ad_prasad@...>
wrote:
Yeah, I looked at its rear
side view and it has 9 pin D style
connectors which appear to be meant for
the scales. I don't see any USB connector
for connecting standard aluminum scales.
It is obviously meant for some dedicated
scales..?
-Prasad
On Tuesday, March 22, 2022, 10:03:48
AM EDT, Ralph Hulslander <rhulslander@...>
wrote:
That looks like it is
just the display. It does not have
any DRO units!
Ralph
While
browsing a link I found this DRO
available on Walmart.com. I
don't see any scales associated
with it.?
Any comments??
-Prasad
--
Clausing 8520, Craftsman 12x36
Lathe, 4x12 mini lathe, 14" Delta
drill press, 40 watt laser, Consew
brushless DC motors and a non
working 3D printer
|
Re: Can this DRO be used?
If you can find one the old ShumaTech DRO-550 works well with the iGaging scales and gives you nice DRO features (like switching between diameter and radius on a lathe, basic math functions on lathe or mill).
Shumatech DRO-550 was a kit and open source software for a DRO that was available about 10 years ago:.? It was a nice concept and a lot
of functionality for the price, it is too bad that they discontinued it.
I also like that it has extensibility through it's RS-232 port which I've used experimentally (never finished) to interface the X axis on my lathe with my electronic leadscrew.
Alex
toggle quoted message
Show quoted text
The aluminium iGaging scales work great. For the price I would just go for it. Worry about the premium another day.
Ralph
On Thu, Mar 24, 2022 at 7:46 AM < grumpy@...> wrote:
I apologize if I'm getting off topic.
Reading
begs more questions.
From what I see Igaging has "standard" capacitive scales, absolute scales,
and absolute plus scales.
On the touchdro page the display is labeled plus.
But shopping around I don't see the plus model.
And it seems Yuri suggest getting glass scales instead of the plus model.
All very confusing for a beginner.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
Re: Can this DRO be used?
The aluminium iGaging scales work great. For the price I would just go for it. Worry about the premium another day.
Ralph
On Thu, Mar 24, 2022 at 7:46 AM < grumpy@...> wrote: I apologize if I'm getting off topic.
Reading
begs more questions.
From what I see Igaging has "standard" capacitive scales, absolute scales,
and absolute plus scales.
On the touchdro page the display is labeled plus.
But shopping around I don't see the plus model.
And it seems Yuri suggest getting glass scales instead of the plus model.
All very confusing for a beginner.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
Re: Can this DRO be used?
I apologize if I'm getting off topic.
Reading
begs more questions.
From what I see Igaging has "standard" capacitive scales, absolute scales, and absolute plus scales.
On the touchdro page the display is labeled plus.
But shopping around I don't see the plus model.
And it seems Yuri suggest getting glass scales instead of the plus model.
All very confusing for a beginner.
|
Re: Can this DRO be used?
I realize this?started out as a DRO question, but in case you might want to go to CNC in the future...
I started out with linear scales connected to a Mesa interface card into a computer running LinuxCNC. The LinuxCNC display replaces the dro head and has all the capabilities and more.? I added stepper motors (which gives me more features than a powered axis). I went with closed loop steppers and in hindsight I could have gotten rid of the linear scales as the stepper driver alarm gets set if the mill goes off course. I wouldn't omit scales with open loop steppers but I would with closed loop steppers which are probably cheaper than open loop steppers plus scales. Closed loop steppers are about $100/axis which is competitive with powered axis. I recently added a tool touch off sensor and a probe so I can accurately locate work and change tools which is a major accuracy improvement and much easier. Not available with DROs.
If you do go with linear scales, there are cheap scales available that have an index signal (along with the AB quadrature signals). The index signal can be used as a very accurate home signal. I've seen this pin label R or I. If you don't have this signal your linear scales will be relative to whatever you use as your "home" signal which could be a microswitch. It's going to be more accurate if you have an index signal synchronized?to the AB signals.
Here is an eBay solution--(Not my
Auction)
2-3-4-5 axis DRO setup
.
Good Luck
On 3/22/2022 7:09 AM, Prasad via
wrote:
While browsing a link I found this DRO available on Walmart.com. I
don't see any scales associated with it.?
Any comments??
-Prasad
|
Re: Can this DRO be used?
??? ??? Theres a guy that did that online somewhere , let me do
some digging & see if I can find it .?
??? ??? here's one , but I know theres another one I was looking
at .
??? ??? animal
On 3/22/2022 5:58 PM, Julian wrote:
toggle quoted message
Show quoted text
Like the idea of the angular readout very much.? I'll have to sign
up to see the details.
I did look at doing something similar for the X axis ... Removing
the magnetic strip from the scale and gluing it into a machined
recess on the underside of the cross slide then machining a pocket
for the pcb in the saddle, but it didn't seem possible without
weakening the lathe components too much.
|
Re: Can this DRO be used?
Here is an eBay solution--(Not my
Auction)
2-3-4-5 axis DRO setup
.
Good Luck
On 3/22/2022 10:56 AM, John Lindo
wrote:
toggle quoted message
Show quoted text
GoolRC 7 Inch LCD
Large Screen Grating CNC Digital Readout Display Lathe
Control Panel Controller Board Engraving Milling Machine
Control System
Advertised as CNC digital readout FOR and including
milling machines, normally?
the LCD display should contain a Z axis, and preferably
the 4th A axis.
But I see only 2 pinouts X Y. IMHO, no good for mills.
Also I do not see any scale bars.
see link below, and with some careful?shopping and
checking the order boxes, you can have 3 axis?including the
scale bars for about the same money.
Not sure if it is available in the USA Bangood hub, but
order direct from China.
Good hunting.
John
Spain
Probably works with common chinese scales, pinout
unknown from ad, manual unknown...
There are many "rebranded" versions of these items...
are they factory overruns? rejects?
Price for the DRO alone seems high to me, compared to
ebay and amazon...
While browsing a link I
found this DRO available on Walmart.com. I don't see any
scales associated with it.?
Any comments??
-Prasad
--
Buffalo John
--
John
|
Re: Can this DRO be used?
Here is an eBay solution--(Not my
Auction)
2-3-4-5 axis DRO setup
.
Good Luck
On 3/22/2022 7:09 AM, Prasad via
groups.io wrote:
toggle quoted message
Show quoted text
While browsing a link I found this DRO available on Walmart.com. I
don't see any scales associated with it.?
Any comments??
-Prasad
|
Re: Can this DRO be used?
Like the idea of the angular readout very much.? I'll have to sign up to see the details.
I did look at doing something similar for the X axis ... Removing the magnetic strip from the scale and gluing it into a machined recess on the underside of the cross slide then machining a pocket for the pcb in the saddle, but it didn't seem possible without weakening the lathe components too much.
|
BuffaloJohn
John Lindo