Instruction/ maintenance manual of the product 1200C HP (Hewlett-Packard)
Go to page of 7
72 February 1994 Hewlett-Packard Journal Media Path for a Small, Low-Cost, Color Thermal Inkjet Printer The DeskJet 1200C media path is heated for media independence, requiring development of a new grit drive roller and pinch wheel combination. A new stepper motor was developed to attain the target speed and accuracy .
February 1994 Hewlett-Packard Journal 73 • Move media very quickly through the print area while main- taining high placement accuracy for good graphics print quality .
74 February 1994 Hewlett-Packard Journal Fig. 3. Heated media path. Preheater Writing Zone Main Heater fed up into the main heater and the writing zone, it is wrapped around the preheater . This contact allows the pre- heater to precondition the media so that when the media reaches the writing zone it is much more dimensionally stable.
February 1994 Hewlett-Packard Journal 75 Stepper Motor Simulation Model The model used to simulate a permanent magnet stepper motor for the simulations described in the accompanying article originated from a classic control systems point of view . The model includes simple position and velocity feedback control algorithms.
76 February 1994 Hewlett-Packard Journal Fig. 2. Simulated velocity profile of a failing motor (8-ohm). –200 0 200 400 600 800 1000 1200 1400 1600 V elocity (steps/s) 0 0.005 0.01 0.015 0.02 0.025 T ime (seconds) Fig. 3. Simulated velocity profile of a good (2-ohm) motor .
February 1994 Hewlett-Packard Journal 77 Reducing Stepper Noise. Once we had the speed that we needed, we had several more hurdles to pass. It was neces- sary to control the motor and make it start and stop pre- cisely without the noises that normally come from stepper motors.
78 February 1994 Hewlett-Packard Journal stepper at slow speeds. For the first time we could measure pinion quality after the gears had been mounted on the motor shaft.
An important point after buying a device HP (Hewlett-Packard) 1200C (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought HP (Hewlett-Packard) 1200C yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data HP (Hewlett-Packard) 1200C - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, HP (Hewlett-Packard) 1200C you will learn all the available features of the product, as well as information on its operation. The information that you get HP (Hewlett-Packard) 1200C will certainly help you make a decision on the purchase.
If you already are a holder of HP (Hewlett-Packard) 1200C, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime HP (Hewlett-Packard) 1200C.
However, one of the most important roles played by the user manual is to help in solving problems with HP (Hewlett-Packard) 1200C. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device HP (Hewlett-Packard) 1200C along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
