{"__v":1,"_id":"55e896f0315c421700d43b57","category":{"__v":1,"_id":"55e896ef315c421700d43b48","pages":["55e896f0315c421700d43b51","55e896f0315c421700d43b52","55e896f0315c421700d43b53","55e896f0315c421700d43b54","55e896f0315c421700d43b55","55e896f0315c421700d43b56","55e896f0315c421700d43b57","55e896f0315c421700d43b58"],"project":"54f78bd68d53ed17000116b3","version":"55e896ee315c421700d43b47","sync":{"url":"","isSync":false},"reference":false,"createdAt":"2015-03-04T22:48:55.455Z","from_sync":false,"order":0,"slug":"first-use","title":"First Use"},"project":"54f78bd68d53ed17000116b3","user":"54f78bb50a3cbb0d00d6668c","version":{"__v":1,"_id":"55e896ee315c421700d43b47","project":"54f78bd68d53ed17000116b3","createdAt":"2015-09-03T18:52:30.275Z","releaseDate":"2015-09-03T18:52:30.275Z","categories":["55e896ef315c421700d43b48","55e896ef315c421700d43b49","55e896ef315c421700d43b4a","55e896ef315c421700d43b4b"],"is_deprecated":false,"is_hidden":false,"is_beta":false,"is_stable":true,"codename":"","version_clean":"1.2.0","version":"1.2"},"updates":["54f9dc27179d392300695795"],"next":{"pages":[],"description":""},"createdAt":"2015-03-05T01:35:32.871Z","link_external":false,"link_url":"","githubsync":"","sync_unique":"","hidden":false,"api":{"results":{"codes":[]},"settings":"","auth":"required","params":[],"url":""},"isReference":false,"order":6,"body":"If you have an assembled Argentum, the stepper current should already be tuned. It's important to check just incase something has gone wrong during shipping.\n[block:callout]\n{\n  \"type\": \"warning\",\n  \"title\": \"Turn off the power to your Argentum before continuing.\"\n}\n[/block]\nGripping the lowest part of the cartridge carriage (close to the rods), move the carriage to roughly the centre of the the printer area.\n[block:image]\n{\n  \"images\": [\n    {\n      \"image\": [\n        \"https://files.readme.io/30rH8ejnRR2zLR39fbZe_Screen%20Shot%202015-03-05%20at%2011.41.13%20am.png\",\n        \"Screen Shot 2015-03-05 at 11.41.13 am.png\",\n        \"486\",\n        \"400\",\n        \"#b8282e\",\n        \"\"\n      ],\n      \"caption\": \"Carriage assembly in centre of print area.\"\n    }\n  ]\n}\n[/block]\n\n[block:callout]\n{\n  \"type\": \"warning\",\n  \"title\": \"Turn on the power to your Argentum before continuing.\"\n}\n[/block]\nWe will now perform a test of the stepper motors. The below instruction will cause your printer to start oscillating diagonally around the print area.\n[block:callout]\n{\n  \"type\": \"info\",\n  \"title\": \"Stepper motor \\\"skipping\\\"\",\n  \"body\": \"Skipping sounds like your tray-table rattling during takeoff and occurs when the motor does not have access to enough current in order to overcome resistive forces in the desired direction of movement.\"\n}\n[/block]\nStart **ARC** if it is not already running. Select **Printer** from the top menu bar then **Utilites > Stepper Motor Test**.\n\n**Your Argentum will now begin the oscillate and will not stop until you click the *Stop* button in the **Console** tab.\n\nWhile it is still oscillating, use your finger to apply a little resistance in the *X* and *Y* directions alternately. Try to apply approximately the force required to push a full mug of coffee across a smooth surface (or tea). \n\n**If the stepper motors don't move when you apply this force and begin to *skip* you will need to adjust your stepper motor current.**\n[block:callout]\n{\n  \"type\": \"warning\",\n  \"title\": \"Stop!\",\n  \"body\": \"Now stop the test by clicking *Stop* in the **Console** tab.\"\n}\n[/block]\n\n\nIf your stepper motors appear to be functioning correctly, move on to the [**next section**](doc:calibration).\n\nOkay, so your steppers can't push a cup of coffee. Don't worry, everything will be fine. Start by opening the rear panel of your Argentum so that the motherboard is accessible.\n[block:image]\n{\n  \"images\": [\n    {\n      \"image\": [\n        \"https://files.readme.io/BgT4LrhSAeW6j5JODwl3_mobo.png\",\n        \"mobo.png\",\n        \"479\",\n        \"192\",\n        \"#c4292f\",\n        \"\"\n      ],\n      \"caption\": \"Motherboard with x-axis stepper motor driver (top) and y-axis stepper motor driver (bottom) highlighted.\"\n    }\n  ]\n}\n[/block]\nStarting with the x-axis stepper motor driver, adjust the trim pot on the module all the way counter-clockwise. This will stop that motor from moving completely. You may have to reinitiate the stepper motor test multiple times while you configure the motor.\n[block:image]\n{\n  \"images\": [\n    {\n      \"image\": [\n        \"https://files.readme.io/ADyjuH86SI6bSpbtdMAj_stepper%20adjust.png\",\n        \"stepper adjust.png\",\n        \"311\",\n        \"200\",\n        \"#e9171f\",\n        \"\"\n      ],\n      \"caption\": \"How to twiddle the stepper motor driver.\"\n    }\n  ]\n}\n[/block]\nNow turn the stepper motor current back up (turning the trim pot clockwise) until that motor starts to move again. Then turn the trim pot an additional 45-90;&deg to ensure that the motors don't skip if they encounter some small resistance during operation. Check that the application of a small amount of force does not cause the motor to start skipping.\n\nRepeat this procedure for the y-axis motor.\n\n[**Next >**](doc:calibration)","excerpt":"Twiddle it a bunch.","slug":"adjust-motor-current","type":"basic","title":"Adjust Motor Current"}

Adjust Motor Current

Twiddle it a bunch.

If you have an assembled Argentum, the stepper current should already be tuned. It's important to check just incase something has gone wrong during shipping. [block:callout] { "type": "warning", "title": "Turn off the power to your Argentum before continuing." } [/block] Gripping the lowest part of the cartridge carriage (close to the rods), move the carriage to roughly the centre of the the printer area. [block:image] { "images": [ { "image": [ "https://files.readme.io/30rH8ejnRR2zLR39fbZe_Screen%20Shot%202015-03-05%20at%2011.41.13%20am.png", "Screen Shot 2015-03-05 at 11.41.13 am.png", "486", "400", "#b8282e", "" ], "caption": "Carriage assembly in centre of print area." } ] } [/block] [block:callout] { "type": "warning", "title": "Turn on the power to your Argentum before continuing." } [/block] We will now perform a test of the stepper motors. The below instruction will cause your printer to start oscillating diagonally around the print area. [block:callout] { "type": "info", "title": "Stepper motor \"skipping\"", "body": "Skipping sounds like your tray-table rattling during takeoff and occurs when the motor does not have access to enough current in order to overcome resistive forces in the desired direction of movement." } [/block] Start **ARC** if it is not already running. Select **Printer** from the top menu bar then **Utilites > Stepper Motor Test**. **Your Argentum will now begin the oscillate and will not stop until you click the *Stop* button in the **Console** tab. While it is still oscillating, use your finger to apply a little resistance in the *X* and *Y* directions alternately. Try to apply approximately the force required to push a full mug of coffee across a smooth surface (or tea). **If the stepper motors don't move when you apply this force and begin to *skip* you will need to adjust your stepper motor current.** [block:callout] { "type": "warning", "title": "Stop!", "body": "Now stop the test by clicking *Stop* in the **Console** tab." } [/block] If your stepper motors appear to be functioning correctly, move on to the [**next section**](doc:calibration). Okay, so your steppers can't push a cup of coffee. Don't worry, everything will be fine. Start by opening the rear panel of your Argentum so that the motherboard is accessible. [block:image] { "images": [ { "image": [ "https://files.readme.io/BgT4LrhSAeW6j5JODwl3_mobo.png", "mobo.png", "479", "192", "#c4292f", "" ], "caption": "Motherboard with x-axis stepper motor driver (top) and y-axis stepper motor driver (bottom) highlighted." } ] } [/block] Starting with the x-axis stepper motor driver, adjust the trim pot on the module all the way counter-clockwise. This will stop that motor from moving completely. You may have to reinitiate the stepper motor test multiple times while you configure the motor. [block:image] { "images": [ { "image": [ "https://files.readme.io/ADyjuH86SI6bSpbtdMAj_stepper%20adjust.png", "stepper adjust.png", "311", "200", "#e9171f", "" ], "caption": "How to twiddle the stepper motor driver." } ] } [/block] Now turn the stepper motor current back up (turning the trim pot clockwise) until that motor starts to move again. Then turn the trim pot an additional 45-90;&deg to ensure that the motors don't skip if they encounter some small resistance during operation. Check that the application of a small amount of force does not cause the motor to start skipping. Repeat this procedure for the y-axis motor. [**Next >**](doc:calibration)