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Need help with a Bondtech Extruder with duet 0.8.5

Posted by Northspire 
Need help with a Bondtech Extruder with duet 0.8.5
February 25, 2017 09:05PM
Hi

I am trying to get my Bondtech qr with a duet 0.8.5 to work. I have found the phases and grouped them but it will not extrude or retract. Any help would be great, thanks in advance. I have tried switching the connections around but it did not help. I have tried both e1 and e0. I have the phases grouped a+ a- b+ b-. The wires on my qr are blue green red black. I'mean sure its a configuration problem either with my wiring or the firmware but I can't figure it out. I am using version 1.18 beta 1 of the firmware.Also I have attached my config file







Edited to correct Grammer and to add info.

Edited 4 time(s). Last edit at 02/26/2017 01:32AM by Northspire.
Attachments:
open | download - config.g (3.1 KB)
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 26, 2017 03:45AM
Common reasons why your extruder won't move:

1. You have no tool selected. Send T0 to select your hot end.

2. You haven't heated up the hot end or turned off cold extrusion prevention. Send M302 P1 to allow cold extrusion.

If you go to the GCode Console page of the web interface, you may find an error message telling you what the problem is.

You have the extruder current set to 500mA, which looks rather low to me. What is the rated current of the extruder stepper motor? is the Bondtech extruder geared?



Large delta printer [miscsolutions.wordpress.com], Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 26, 2017 10:12AM
yes the extruder is geared with a 5.18:1 ratio the current is 1.2A
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 26, 2017 05:40PM
Hi Northspire, the connection on the motor is A1 X B1 A2 X B2 where X is empty slot . Have a look at www.bondtech.se/faq
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 26, 2017 07:09PM
Yes it is i was refering to the wiring on the duet end of the cable.
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 08:06PM
I selected the tool,tried both heated up to 180c and with cold extrusion enabled and set the current to 1200 mA. Still no movement from the extruder
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 08:11PM
I've looked at your config.sys and you have three duplicate commands for your extruders.

Here are your config/sys' duplicate M906 commands:

M906 X1000 Y1000 Z1000 E800 ; Set motor currents (mA)
M906 E500:500

If you want to use 500mA for your 2 extruders (I also think that's too low) then you should delete the second M906 line and the single M906 line should then read:

M906 X1000 Y1000 Z1000 E500

Here are your config.sys' duplicate M203 commands

M203 X18000 Y18000 Z18000 E3600 ; Maximum speeds (mm/min)
M203 E500:500

Delete the second M203 command. The first command looks good but the second command is unnecessary and has a syntax error.

Here are you config.sys' duplicate M566 commands:

M566 X600 Y600 Z600 E600 ; Maximum instant speed changes
M566 E500:500

Delete the errant second line. The first command looks good but the second command is unnecessary and has a syntax error.

Hopefully editing these out will fix the issue.
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 08:57PM
ok I have deleted the duplicate lines but still no movement. I have uploaded the edited config.
Attachments:
open | download - config.g (2.2 KB)
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 09:21PM
This config.sys file that you have just uploaded was generated by RepRapFirmware Configuration Tool on Mon Feb 27 2017 17:49:08 GMT-0500 (Eastern Standard Time), about 30 minutes ago. Is it possible that you used this newly generated file instead of simply editing the one that you first posted?
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 09:23PM
Yeah I did but still no movement.

YAHOOOOOOO!!!!!!!! It's Alive IT"S ALIVE......

Edited 1 time(s). Last edit at 02/27/2017 11:12PM by Northspire.
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 11:11PM
I do not think it is a config issue if you have made the suggested edits, so that leaves wiring or something else as the culprit. You can verify the correct pairing of the motor's two pairs and the integrity of the connector most easily with a multi meter. . Snippet below is from the wiki, where several other methods of verifying correct pairing are described if you do not have access to a multi-meter.

"This is about finding the two pairs of wires which are connected to each of the two coils.
Method with an ohm-meter
Simply measure pairs of wires for their resistance. If the resistance is a few ohms ( < 100 Ω) only, you've found a pair. The other two wires should make up the other pair."


This test will verify the paring and if the connector is OK. Good luck.
Re: Need help with a Bondtech Extruder with duet 0.8.5
February 27, 2017 11:40PM
ok thats weird. It worked twice and now it won't. Sounds like a loose connection to me. Time to check the wiring.
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