Heated bed wiring January 11, 2014 02:57AM |
Registered: 10 years ago Posts: 145 |
Re: Heated bed wiring January 11, 2014 03:55AM |
Registered: 10 years ago Posts: 14,672 |
Re: Heated bed wiring January 11, 2014 01:12PM |
Registered: 10 years ago Posts: 119 |
Re: Heated bed wiring January 11, 2014 01:14PM |
Registered: 13 years ago Posts: 1,611 |
Re: Heated bed wiring January 11, 2014 01:23PM |
Registered: 10 years ago Posts: 119 |
Quote
droftarts
If you can't crimp the connections, I think the smallest possible 'chocolate block' type connector you can find would be the best choice. Then you could take the bed off when you needed to.
Ian
RepRapPro tech support
Re: Heated bed wiring January 12, 2014 05:21AM |
Registered: 10 years ago Posts: 145 |
Re: Heated bed wiring January 19, 2014 03:04PM |
Registered: 10 years ago Posts: 145 |
Re: Heated bed wiring January 19, 2014 03:18PM |
Registered: 10 years ago Posts: 14,672 |
Quote
GregL
None of the homing worked correctly!!
Z homing just ran into the bed, and eventually unscrewed the threaded rod out of the Z gear
Greg
Re: Heated bed wiring January 20, 2014 04:20AM |
Registered: 10 years ago Posts: 145 |
Re: Heated bed wiring January 20, 2014 04:34AM |
Registered: 10 years ago Posts: 14,672 |
Quote
GregL
Cannot see where G31 is explained in the Commisioning process.
Re: Heated bed wiring January 20, 2014 04:40AM |
Registered: 10 years ago Posts: 1,230 |
Quote
GregL
Cannot see where G31 is explained in the Commisioning process.
Greg
Quote
....Next send a G31 command. This fires the Z probe and reports the measurement it makes in the Serial Monitor window. The measurement should be about 950 or so.
(What’s going on? The Z probe works by reflected IR light. The closer it gets to the aluminium the more light is reflected, and this sends back a bigger voltage to the Duet controller, which converts the voltage into a number. The biggest possible voltage is 3.3 volts, which the Duet would convert to 1023 = 210 – 1. So the 950 means “pretty close”.)
Now. It is not a good idea to zero the Z axis by driving it down and looking for this value for two reasons: 1. the probe is not very accurate or sensitive at the very top end of its range, and 2. it gives us no room for error – we might crash the bed.
So, raise the Z axis in small increments and send a G31 after each movement. As you start, you will see almost no change (not very accurate or sensitive at the top of its range, remember?), but then the readings will start to drop. Stop when they are somewhere between 700 and 600. Suppose the value is 656. Look at the Z position box. Z will probably be between 1 and 2mm off the bed – say it’s 1.8mm.
Now send G31 Z1.8 P656
This use of G31 sets values, rather than reporting them to you. It tells the Duet that a reading of 656 corresponds to Z = 1.8 mm off the bed....
Re: Heated bed wiring January 20, 2014 06:52AM |
Registered: 10 years ago Posts: 145 |
Re: Heated bed wiring January 20, 2014 07:20AM |
Registered: 10 years ago Posts: 145 |
Re: Heated bed wiring January 20, 2014 11:51AM |
Registered: 10 years ago Posts: 578 |