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rk425

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  1. Hi Again, per the instruction on the assembly I have "35. Mount the wires from the thermocouple into the thermocouple board. Red wire on the right, yellow wire on the left." Wires and connections are definitely as per the image in the assembly manual.
  2. The voltages at the sensor board leads (measured at back of connector) are: Hi Again, To get a better idea of the situation I took more voltage readings: Readings at the Sensor board connector from temp1 lead (from controller) Red - Black - 3.84v Black - yellow - 4.97v Red - Yellow - 1.12v Voltages at the sensor leads (where thermocouple leads screw into screw block) Yellow - Red - 0.00 V I was not sure if this is just a poor connection onto the terminal blocks, so i disassembled the plastic cover etc and again get 0v from the solder joints for the screw terminal . I hope this
  3. Hi again, I noticed that the thermister (now a thermocouple) didnt exactly look like the one in the data sheet, but they are often packed in a metalic case for high temp apps, and it was on the official ultimaker page as a part number. Have you got a part number on the thermocouple? I did buy it from the Ultimaker shop, not ebay. voltage between yellow and black leads is 5.39 V
  4. Thanks for the reply: I found on the Ultimaker site that the part number is: Manufacturer: Epcos Manufacturer part number: B57540G0104J This corresponds to a 100K base Thermister (data sheet: http://docs-europe.electrocomponents.co ... 659f28.pdf ) Why can I not simply measure the resistance at about 25 degrees and compare to the 25 degree rated ohms (100K) for this device? My understanding is that it is just a resistor which is inversly proportional (non-linear) to temp, at 25 deg it should read 100K but I am reading 1.2 ohms, this would deinitely demonstrate that there is a proble
  5. Thanks for the reply: I have checked all the wiring only way it could be a short is if it is within the metal shielded cable or in the head of the thermister. Roughly what resistance should I see accross the open terminals of the Thermister (i.e. removed from machine ). Anyone know what the specs are as I see no part numbers etc? I have removed the thermister and checked the resistance across it and its 1.2 Ohms @ about 20 degrees, I am guessing it should be alot higher. Anyone got a partnumber?
  6. I recently purchased an ultimaker kit, I have assembled it and was most impressed with the quality of the kit and how everything went together. Once the unit was assembled I installed the software: the ReplicatorG 035 build, drivers installed Manually and connected OK. I had to update the firmware to the Marlin build, this went fine. This is when the following problems started: 1. Attempted to do the motion test as per the Guide: There was no control from the control panel, none of the manual motion controls worked. 2. During several attempts the ReplicatorG would just lock up, and neve
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