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Printing issues ...
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Hi,
I would like to try my stepper motors and nothing seems to respond!
The RAMPS is attached to an Arduino board and connected to a power supply (both 11A and 5A).
I have installed the 3 jumpers under a DRV8825 on the X-axis and connected a stepper motor on the X-axis.
The latest version of Marlin was uploaded without error and I am using a RepRapDiscount FULL GRAPHIC Smart Controller.
On t
by
J3d
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Reprappers
I found what the problem was: this temperature sensor has a different characteristic curve
It is a nickel 6180 ppm/K instead of platinum 3850 ppm/K
Therefore I had to change the coefficients A and B for the formula in Marlin - thermistortables.h and use
#define PtA 5.485E-3
#define PtB 6.655E-6
instead of
#define PtA 3.9083E-3
#define PtB -5.775E-7
This seems to have solved the problem, a
by
J3d
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RAMPS Electronics
Thanks Robert
I plugged my PT1000 directly on the RAMPS (defined as TEMP_SENSOR_BED 1047 in Marlin) and I have a PT100 in the hotend (TEMP_SENSOR_0 1).
The two sensors are in front of me, no heating on the heatbed or extruder and the temperature of the room is about 22C.
The reading from the PT100 is 22C and it stays there, however for the PT1000 shows 32C.
When I put them in a glass with ice
by
J3d
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RAMPS Electronics
Hi,
I have PT1000 temperature sensors from a previous project that I would like to use for my RepRap.
Can I simply plug one of these PT1000 (instead of the usual PT100) for the heatbed for example without other physical modifications? and what changes does it require other than :
#define TEMP_SENSOR_BEB 1047?
J3d
by
J3d
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RAMPS Electronics
For the CF rods I found 5x7mm tubes, rolled construction (I understand that the pulltruded are not suited because only strong longitudinally, not across their main axis) for under $2 per 500mm length, how does that sound?
by
J3d
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Reprappers
Your link does not work ("SteppersOnline.com is for sale")
The 6mm rods I found in a Canon and in a Dell branded printer (made by Lexmark): that was a disappointment because what served as guide for their scanner was a mere fold in the plastic frame.
I saw what Tech2C did, and this encouraged me with CF, but he used 10mm diameter tubes which may be a bit much for what I am making.
The price fo
by
J3d
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Reprappers
I have not had any success finding stepper motors, only cheap DC motors, even the large laser printers I dismantled had brushless motors, this is why I ordered them
As for the rods, it seems that only HP uses 8mm stainless steel ones in their scanners, other manufacturers use anything from 6mm to 13mm or so
In case I cannot find all the rods required, I was considering buying 8mm OD (and either
by
J3d
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Reprappers
Thank you all for your help
I have now assembled the 12mm MDF frame with epoxy & pre-drilled/glued wood screws
That seems sturdy enough, so far so good
I have ordered stepper motors, drivers and the other electronic components
And while waiting for my delivery I am salvaging old printers/scanners for 8mm rods...
by
J3d
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Reprappers
I understand that this is the usual way of doing it, but the MDF I have is probably of a lower quality/density and cracks open very easily
Hopefully the epoxy will work...
by
J3d
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Reprappers
I will try with epoxy instead of wood glue and pieces of hardwood in the corners
by
J3d
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Reprappers
I tried to pre-drill and for 16mm MDF (and thicker) it works well, but for this 12mm unless I drill a very large hole (in which case the screw does not do much) it cracks
I also tried doubling the layers but then the screw fall just in between the 2 sheets and only holds thanks to the glue also
by
J3d
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Reprappers
Hi,
I would like to build a wooden frame using 12mm MDF which is the only I can find.
A friend can make straight cuts and I was thinking about making a simple box frame with 100mm (or more) wide strips.
My question is how to assemble the MDF strips to form a sturdy frame?
People normally use plywood, and use glue plus screws.
But 12mm MDF is not thick / strong enough to use wood screws witho
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J3d
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Reprappers
Hi guys
I understand that LCD display itself may work with only 3 pins (MOSI, SCK and CS) + VCC & GND, but what about the beeper & button?
These are the main reason I wanted to use this 12864 Smart LCD Display instead of a mere LCD screen.
There must be a couple more pins to connect, isn't it?
J3d
by
J3d
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RAMPS Electronics
Hi,
Is it possible to connect this LCD display directly to a microcontroler (Arduino, or preferably ESP12/32) without going through the RAMPS 1.4 itself?
J3d
by
J3d
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RAMPS Electronics
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