Richard, I am really leaning towards getting a larger stepper motor for my 8 tpi leadscrew.
I have not mounted the stepper I have.
Do you or anyone have a recommended stepper for the 8 tpi leadscrew?
I would imagine with a larger motor I would direct drive and not use a gear.
I have used in the past.?
I can use the steppers I have when I do my 4x12 mini lathe.
Also I am "thinking" about using the??for my X drive would that work or do I need a larger motor for X as well?
Thanks for all of the help, the heat is letting up so I am headed back outdoors to do those hundred of things I need to do.
Ralph
On Wed, Jul 22, 2020 at 3:18 PM Ralph Hulslander via <rhulslander=
[email protected]> wrote:
These are the steppers I have but I could get different ones if I get another stimulus?check.
?
I have thought of getting some NEMA 34 steppers and driving the leadscrew directly.
Ralph?
On Wed, Jul 22, 2020 at 3:00 PM Richard <
edelec@...> wrote:
Re pitch yes 0.396875mm but I expect you will have problems. What
stepper are you using and how are you driving it?
Best to use Open Office for the moment. We are working to make the
Spreadsheet acceptable to both Open Office and Excel.
Richard
On 22/07/2020 18:03, Ralph Hulslander
wrote:
Thanks Richard, I was using Excel
not Open Office. I do have Open Office so I will try again.
re: "
My leadscrew has a 3mm?pitch but is driven 2:1 so is entered
as 1.5mm.?"?
I have a 8TPI (3.175) Z leadscrew the
stepper motor will have a (motor 8
rpm leadscrew 1 rpm)
re: "
| Z
Leadscrew Pitch mm |
1.5000 |
|
If a gear or timing belt
drive is used enter the pitch as ¡°seen¡± by the
stepper for one revolution
|
"
|
So should I enter 0.396875
(3.175/8)
Ralph |
|
|
|
|
|
|
|
|
|
|
|
|
On Wed, Jul 22, 2020 at 2:15
AM Richard <
edelec@...> wrote:
?I just checked to ensure that the Spreadsheet file was
not locked and it is not so I am not sure why you are? not
seeing the calculations change after changing the
parameters. I did note a single cell error in the
spreadsheet which I have fixed. Please download
RELS_V3.00i.ods and work with that.
I would suggest you rethink your parameters.
An entry for Z pitch of 3.175mm suggests you have a very
large stepper driving the screw. You will see that the entry
for pitch is that "seen" by the stepper. In other words
after any timing belt reduction if used. My leadscrew has a
3mm
pitch but is driven 2:1 so is entered as 1.5mm.
It is unusual to run your motors at full step.
Your encoder needs to installed with a "step up" belt drive.
800ppr will give poor resolution.
Basically the numbers that you are suggesting will give a
very poor setup.
However if just simulating on the bench then no matter. Just
check all of the error messages in the spreadsheet. If the
message indicates that a thread, feed-rate, or taper is
unacceptable a sketch running those derived tables will have
un-determinable results!!!!!!!
Good luck
Richard
?
On 21/07/2020 22:29, Ralph Hulslander wrote:
Thanks Richard, I see you uploaded new
files. THANKS!!
I started looking at the spreadsheet and really got
confused.
I "thought" that if I changed the parameters they
would update through the tables but apparently not.
I have 8 TPI 3.175mm
Encoder 800 ppr
Z Stepper steps 200(? might change)
X Stepper steps 200(?)?
I still need to mount the Z & X steppers but
thought I would do a desktop simulation.
I can use a PWM module for the spindle encoder
pulse.
Actually it is really hot outside so I am able to
steal some time to work on ths. I am supposed?to be
working
in the garden or doing the hundreds of things I
need to finish outside.
You will probably hear a lot of yelling and
screaming and cussing and hair pulling.
But thanks again! This will really be so cool to
get operating. We need videos of RELS in action.
Ralph
On Tue, Jul 21, 2020
at 3:13 PM Richard <
edelec@...>
wrote:
Things have moved on! You would be better
downloading the following files:-
Manual
Parts
Schematic
And the two RELS-V3 files
Bear in mind that the RELS does not allow feeding or
threading at thousands of rpm. However it covers
just about all of the threads you might want with
the capability of adding more. You can work in
metric or imperial. Any taper from parallel to 45
degrees Internal or External. Only 5 buttons plus a
reset. Threading can be plunge or 29.5 degrees.
Allows for checking the thread at the end of an auto
cycle then further cuts if needed. 0 to 3 spring
passes can be set in Auto. Threading is performed at
constant cut area. Not difficult for a layman to
build. Not expensive. Encoder controlled so it can
handle speed droops during a threading pass. Arduino
Mega based so simple to download. Arduino IDE is
required for upload and Open Office required for the
spreadsheet file used to generate the parameters for
YOUR machine.
Any problems just yell.
Richard
On 21/07/2020 18:56, Ralph Hulslander wrote:
Darn I bet?RELS_Metric_2-32.ino? is
the RELS files, duh!
Ralph
--
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
--
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
--
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
--
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
--
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
