Giant Delta printer Slow Homing issue.

[sozkan]

@Veti Actually We have purchased the electronic hardware last year. We had some problem to fin suitable place with in the university. Finally started. But we may upgrade. if really makes difference.

[sozkan]

@Phaedrux width of the belt 25 mm.

[Phaedrux]

Well if you're certain that tooth to tooth distance is 10mm then I guess that's that.

[sozkan]

@Phaedrux said in Giant Delta printer Slow Homing issue.:

Well if you're certain that tooth to tooth distance is 10mm then I guess that's that.

I have confirmed twice also in the video once, step/mm calculation is right according to the 10 mm pitch.
The Actual problem is on the last axis homing.
I will try to setup like a cartesian machine and try homing again.

[dc42]

Please can you show in a video how you measured the tooth pitch to be 10mm.

[Dougal1957]

@sozkan said in Giant Delta printer Slow Homing issue.:

@Phaedrux said in Giant Delta printer Slow Homing issue.:

Well if you're certain that tooth to tooth distance is 10mm then I guess that's that.

I have confirmed twice also in the video once, step/mm calculation is right according to the 10 mm pitch.
The Actual problem is on the last axis homing.
I will try to setup like a cartesian machine and try homing again.

can you also move the 50mm like you did set your callipers to that and then show us the callipers against the belt teeth if you move 50 mm then we should only see 5 teeth if the belts are truly 10 mm pitch (Which I doubt)

[Veti]

as you can see we are all very interested, as we have not seen a belt like that

the white belts tend to have steel cores. they tend to break especially with 180 degree turns.
can you please post a link to the belts used.

[sozkan]

@Dougal1957
Hi, here is the link of the video of breef info about components and measurement proof of belt teeth .
Youtube Link: for the homing calibration and teeth

[sozkan]

This post is deleted!

[sozkan]

@Veti said in Giant Delta printer Slow Homing issue.:

as you can see we are all very interested, as we have not seen a belt like that

the white belts tend to have steel cores. they tend to break especially with 180 degree turns.
can you please post a link to the belts used.

First of all thanks for the concern. There is steel fiber, the Smaller the pulley, the lesser the life span. But 14 teeth hopefully not a big problem.
Here is the link information about belt : Belt info: https://www.maedler.de/Article/16470000

[dc42]

Thanks for confirming the belt pitch; I am sorry that I doubted you.

@sozkan said in Giant Delta printer Slow Homing issue.:

I have changed as you suggested it did not work!
working one as previous :

; Drives
M569 P0 S1 R1 T3:3:5:0                                        ; physical drive 0 goes Forward
M569 P1 S1 R1 T3:3:5:0                                      ; physical drive 1 goes Forward
M569 P2 S1 R1 T3:3:5:0                                       ; physical drive 2 goes Forward
M569 P3 S1 R1 T3:3:5:0                                        ; physical drive 3 goes Forward
M584 X6 Y7 Z8 E5                                   ; set drive mapping

Those M569 commands are definitely wrong. Your external drivers are P5 P6 P7 P8 as @jay_s_uk said. This is probably why the motors move the correct amount when all 3 are moving, but not when just one is moving. That in turn explains the slow down when one carriage reaches the endstop, and the failure to complete homing (because the other carriages are not travelling as far as they should).

[sozkan]

@dc42 said in Giant Delta printer Slow Homing issue.:

P5 P6 P7 P8

Hi, Thank you for concerning and valuable input.
I have changed again M569 values as you mentioned. Motor did not moved. But they became motors off stage. I mean motor enable signal reversed, So motors free while homing but none of them moving.
here is the current code : Do I need to change any other code relative to the Drive P values?

; Drives
M569 P5 S1 R1 T3:3:5:0                                       ; Extruder drive 0 goes Forward
M569 P6 S1 R1 T3:3:5:0                                     	 ; X:A drive 1 goes Forward
M569 P7 S1 R1 T3:3:5:0                                       ; Y:B drive 2 goes Forward
M569 P8 S1 R1 T3:3:5:0                                       ; Z:C physical drive 3 goes Forward
M584 X6 Y7 Z8 E5                                  			 ; set drive mapping
 

Did I miss anything ? I am going to reverse Drivers Enable signal input right now for try. I wonder if that one is the problem.
Thanks.

[jay_s_uk]

That's a good sign as it means your drivers are actually being set by the firmware now.
You can change whether the motors are active high or active low using the R value. So it seems you need them all on active low. Change R1 to R0 on each driver

[sozkan]

@jay_s_uk said in Giant Delta printer Slow Homing issue.:

That's a good sign as it means your drivers are actually being set by the firmware now.
You can change whether the motors are active high or active low using the R value. So it seems you need them all on active low. Change R1 to R0 on each driver

With previously updated values, I have reversed enable cables on driver that makes the motors move with a horrible sound like noisy signals and slow all axis. I will test now with R0 and also revert the enable cable inputs for a try.

[jay_s_uk]

@sozkan what external boards are you using? do you have a link?

[sozkan]

@jay_s_uk said in Giant Delta printer Slow Homing issue.:

@sozkan what external boards are you using? do you have a link?

It seems right this time but with this "P5, P6, P7, P8" values all motors running with noisy signals and slower with vibration. Homing not successful at first. Distancing not correct.

Driver : https://www.act-motor.com/closed-loop-stepper-driver-hbs86h.html
Motor : Motor and Driver Set

[jay_s_uk]

looking at the datasheet I think your timing are not correct for the driver.
there needs to be at least a 6us setup time for direction
I would maybe try a timing of T3:3:6:0

[dc42]

Looking at the data fore the driver that you linked to, the other thing you may need to do is use the alternate connection method to the expansion board:

• Connect PUL+ and DIR+ driver input to the +5V pin on one of the servo headers on the breakout board
• Connect PUL- to STEP- on the breakout board, and DIR- to DIR-.

The data says that you can leave ENA+ and ENA- not connected. This is probably best until you get everything working, however the Duet won't be able to turn the motors off. Therefore, when movement is working correctly, you may wish to connect ENA+ to +5V on the breakout board, and ENA- to ENA-. Use whichever of R0 and R1 works in the M569 commands.

[sozkan]

Hi,
It finally succeeds, running smooth and correct in calibration, homing perfect, by changing ;

• Connect PUL+ and DIR+ driver input to the +5V pin on one of the servo headers on the breakout board
• Keep Remain PUL- to STEP- on the breakout board, and DIR- to DIR-.
• Revert back the P values to "P0, P1, P2, P3" ( Because Correct one Create noise like ball bearings broken and move uncalibrated ). Therefore I cannot control the default direction (S values) ( But however on the drive I managed to change it ).

In a conclusion, even if it is solved, working better with an incorrect parameter. However, a +5V connections make a good job.

I still want to work with the correct parameters as you advise.

Thank you very much.

[droftarts]

@sozkan said in Giant Delta printer Slow Homing issue.:

Revert back the P values to "P0, P1, P2, P3" ( Because Correct one Create noise like ball bearings broken and move uncalibrated ). Therefore I cannot control the default direction (S values) ( But however on the drive I managed to change it ).

Your external axes will be using default timing. Send M569 P5 and see what it says. It did not run well because of the T parameter settings you used: M569 P5 S1 R1 T3:3:5:0

From the product page you linked, there's this, which shows the timing you should be using:

M569 T parameter, where Taa:bb:cc:dd:
aa = Minimum driver step pulse width, in microseconds = t3 in image = not less than 2.5us
bb=step pulse interval, in microseconds = t4 in image = not less than 2.5us
cc=direction setup time, in microseconds = t1/t2/t5 in image = at least 6us
dd=direction hold time, in microseconds = t1/t2/t5 = at least 6us
Enable signal t1 = assume that you have ENA+ an ENA- floating, so constantly enabled. Also, I think t3 and t4 are the wrong way around in the image, but they are the same value.

From this, try:

M569 P5 S1 R1 T2.5:2.5:6:6  ; Extruder drive 0 goes Forward
M569 P6 S1 R1 T2.5:2.5:6:6  ; X:A drive 1 goes Forward
M569 P7 S1 R1 T2.5:2.5:6:6  ; Y:B drive 2 goes Forward
M569 P8 S1 R1 T2.5:2.5:6:6  ; Z:C physical drive 3 goes Forward

Ian