Wonder why you decided to go with belts rather than leadscrews, it's interesting ? I see people using the white steel reinfored belts when used on the Z axis, I guess to try to reduce ringing and stretching ? I've used a 2:1 belt on my cart printer .. (no 3D printed parts were used or harmed in the making of this printer) Like in his Z axis ... Belted Z axis He's using this worm gear setby Pippy - General
QuoteWescherry Best to ignore MkSA. He is very rude and brings a dark cloud to this forum. I come here for digital-dentists wisdom but get really turned off by MKSA’s outright abrasivemess. mmm, any other forum and they'd have been booted a long time ago. The 'guy' (I presume ?) certainly has or has had a few life problemsby Pippy - CoreXY Machines
oh good Have they added the fix permanently to the Marlin code I wonder ? Had a look in 2.0 and they have .. #if HAS_Z_MIN #if ENABLED(Z_TRIPLE_ENDSTOPS) PROCESS_TRIPLE_ENDSTOP(Z, Z2, Z3, MIN); #elif ENABLED(Z_DUAL_ENDSTOPS) PROCESS_DUAL_ENDSTOP(Z, Z2, MIN); #else #if ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN) if (z_proby Pippy - Printing
Could maybe comment out (preceed the line with double forward slash // .. from #define USE_ZMIN_PLUG #define USE_ZMAX_PLUG to //#define USE_ZMIN_PLUG //#define USE_ZMAX_PLUG in your Configuration.h file. Then recompile and upload the firmware.by Pippy - Printing
I did one too a while back from the schematic I found on the net, but I've slightly modified mine to protect the gate of the fet (with a zener) and improve the gate drive voltage when the supply is on the low end.by Pippy - Controllers
A 32-bit ARM board for £15 is quite amazing really, no more messy TMC added wiring. Just goes to show how the rest of the world inflates their prices, plus how little the chinese workers get paid etc. As much as I dislike what the chinese get up too (some of it out strips your worst nightmares by far), this new board together with the new TMC 5160/5161's I'm sure is going to be the go too combinby Pippy - Controllers
QuoteNitroFreak SInce we had a severe time constraint during the competition, some parts are not built quite up to spec or visual pleasure. Quite the opposite, I find all the engineering extremely visually pleasing myself. Really nice! Oh to have the tools to build a nice machine.by Pippy - General New Machines Topics
So far only the TMC2130 and TMC2660 source code in the TMCStepper library supports sensorless homing (stallguard). I guess in time (hopefully very soon) it will be added to the TMC5160 source code driver too, especially as the TMC5160 is very nice indeed with the external mosfets (loads more current and easy to repair the output stage if need be). If I had a TMC5160 module I'd work on it straigby Pippy - Firmware - Marlin
You can't print faster than the max feed rate without stepper motor stalls and/or missed steps, so I guess you need to ensure you don't over step the max feed rate whilst extruding. It doesn't matter if you're just moving the extruder nozzle from point to point without extruding.by Pippy - Firmware - Marlin
What's the voltage on the RADDS board thermistor pins (between 0V and the signal pin) with the thermistor disconnected ? If it's still not 3.3V then it sounds like something on the board(s) is pulling the pin down slightly or the 4k7 pull-up resistor on the RADDS board is not soldered/missing/damaged.by Pippy - Printing
Prise off the two plastic display connector shrouds on the MKS Gen board (EXP1 & EXP2), then turn them 180deg and put them back on. MKS have built ALL their boards with the two display connectors on back to front. So everyone who buys their boards have to put their own boards right, because MKS won't.by Pippy - Delta Machines
A while back I received two SOT-23 SMD transistors last year in a 12" cube cardboard box, it took me a good few minutes to find them amongst all the bubble rap. Today, I received a short piece of silicone rubber tube (see attached) off ebay from a UK seller.by Pippy - General
The "feedrate" value sets the maximum speed the motor runs at. Reduce that value down to slow things down. The steps/mm has to be right (2 x 829 for your extruder I guess) no matter what other settings you have.by Pippy - Firmware - Marlin
Hello -27C normally means a missing or open circuit thermistor, or the analogue pin is high (+5V on 8-bit Atmel, +3.3V/+3V on 32-bit). Put your multimeter/scope on the thermistor pin on the RADDS board/connector and see what the DC voltage is - it should be around 3.17V at 22 deg C (B3950 100k therm) with a DUE board. Thermistor resistance/voltage calculator If it looks OK, then follow it bacby Pippy - Printing
Well, I wouldn't mind a duet 2 wifi with the reprap firmware ! When we're done with this horrible mks rubbish (hardware/soldering faults are many with brand new controller & driver boards) and marlin we will get a duet for sure. In the mean time, we'll battle our way through the sub-low end .. not by choice I should add - at this present time.by Pippy - Stepper Motors, Servo Motors, DC Motors
According to Gates, their GT2 drive belts are rated for a working temperature range of -54°C to +85°C. Gates Polychain GT2 I guess you'll have to swap to leadscrews if the belts fail when you use them in your 160°C chamber ?by Pippy - CoreXY Machines
I was wondering what the reason is for the TMC2208 driver used in Marlin to have short circuit protection disabled for both the low side and high side MOSFETS's ? I've enabled the short circuit protection with so far no ill effects by adding the following into the TMC driver section in Configuration_ADV.h file (we use UART comms from MCU to each TMC2208) .. // enable low-side and high-side sby Pippy - Stepper Motors, Servo Motors, DC Motors
Are drive belts OK to work in those conditions as well I wonder ?by Pippy - CoreXY Machines
Hello Which external MOSFET module do you have exactly I wonder? Their are a few different types .. MOSFET modules Most all MCU's have their pins in high impedance mode when in reset/boot-up mode, so if the pin has an external pull-up then that would turn a FET on during that period (which you do not want). But it all depends on how you have it wired and on the external MOSFET schematic etc.by Pippy - Controllers
Just did a quick first PID auto tune of the bed. Looks as though it's just right really. 16V'ish bed voltage, Marlin PWM'ing the external 210Amp FET switching the bed on/off. Have embedded 4 * 100k B3950 thermistors into the base of the bed, silicon thermal rubber glued into holes. The 4 thermistors are equally spaced to ensure a good average temperature reading of the 4mm aluminium bed plate.by Pippy - Mechanics
As the TMC2208 uses a single pin for UART comms MCU<>TMC2208, I thought it was a waste using separate Rx/Tx pins on the MCU that combined via a 1k resistor anyway. So I've made a very small change to Arduino's SoftwareSerial module to allow the use of a single Rx/Tx pin .. this freed up the Tx pins on the mega's that were being used for my TMC2208's. I'll do a 32-bit STM32F4 version of Soby Pippy - Firmware - Marlin
Doesn't all that dirt/dust get into your linear rails and filament path ways etc ? It's a shame to expose an already poorly printer to such an environment.by Pippy - CoreXY Machines
If you release the belts and move the X/Y by hand, does it bind or not feel smooth I wonder ? and do all the pulleys rotate smoothly without binding when turned with the belts released ?by Pippy - CoreXY Machines
Two small corrections .. C12 and a labeled pin.by Pippy - Controllers
This is the noise level I'm getting with the board using a 12V cheap PSU feeding a 150W boost DC-DC to 24V feeding the board/stepper motor. The peak-peak noise is within 1 ADC bit - the Marlin code averages ADC samples to obtain sub-bit temperature sensor sampling. It's still a little up and down with the noise so could be better, but it's more than good enough for the intended purpose really. Rby Pippy - Controllers
We put the scope on the +5V supply (after F3) on the MKS GEN V1.4 and found a fair bit of switch mode PSU output ripple (100mV p-p), so then soldered a 1000uF 10V cap and a 100n cap on the back side of the board on the track directly under neath F3. The +5V ripple was reduced by quite a bit (down to approx 10mV p-p). It's no surprise at all because the chinese do not fit decoupling caps if theyby Pippy - Controllers
Fixed a couple more errors and found out MKS's documentation is wrong .. incorrect pins listed.by Pippy - Controllers
Forgot to connect the AVCC pin of the MCU to +5Vby Pippy - Controllers
Here's the schematic of the MKS Gen v1.4 board, might interest someone out there ? I think I've got it just about right. Let me know if you spot anything that appears incorrect.by Pippy - Controllers
QuoteShreks donkeyMy biggest point of contention (with ebay) is when sellers falsely represent the product as coming from Australia and state that the postage is fast and free, then they drop ship it from China and it takes 3 weeks to turn up, then when you get it it's in a China post satchel complete with a Chinese shipping label. It's getting really hard to find a genuine local seller for electby Pippy - Controllers